diff --git a/ARCHITECTURE.md b/ARCHITECTURE.md
index f161c37..5789525 100644
--- a/ARCHITECTURE.md
+++ b/ARCHITECTURE.md
@@ -141,7 +141,7 @@ Fachliche Annahmen, getroffen weil das Lastenheft an der Stelle keine eindeutige
 19. **Backups versiegelt**: AES-256-GCM über das gzip-Bundle, Schlüssel aus dem Schlüsselbund `BACKUP_ENCRYPTION_KEY` (+ `BACKUP_ENCRYPTION_KEY_PREVIOUS`, in Produktion Pflicht, siehe Annahme 22); Dateien von vor dem Schlüsselbund (Schlüssel per HKDF aus `JWT_ACCESS_SECRET`) bleiben lesbar, solange `JWT_ACCESS_SECRET` unverändert ist. Nur versiegelte Dateien stellen vollständig wieder her (und überschreiben). Eine unversiegelte (alte v2-)Datei darf nur die 27 Stamm- und Feldtabellen der Erlaubt-Liste `LEGACY_UNSEALED_TABLES` ergänzen – fehlende Zeilen anlegen, bestehende nie ändern. Alles andere (Benutzer, Rollen, Webhooks, Audit-Log, Kalender-Sync, Backup- und Website-Einstellungen, Nummernkreise, Bestands- und Chargenbewegungen, Shop-Anfragen, Rohstoffe/Herstellung, Dokumente, Benachrichtigungen samt Einstellungen, Vorschläge, Pflanzenentwicklungs-Meldungen und jede künftige Tabelle) kommt nur aus versiegelten Dateien; die Oberfläche listet übersprungene Tabellen auf; Import verlangt Passwort (+ TOTP). MFA- und Webhook-Secrets liegen mit eigenen Schlüsseln (`MFA_ENCRYPTION_KEY`, `WEBHOOK_ENCRYPTION_KEY`) verschlüsselt in der DB und damit auch im Backup – für eine Wiederherstellung in einem anderen Deployment dort dieselben Schlüssel setzen (oder als `*_PREVIOUS`), sonst müssen Webhook-Secrets und MFA neu eingerichtet werden.
 20. **Bearbeiten-Regel für `null`** (Grundsatz „alles bearbeitbar“): In jeder Bearbeiten-Anfrage bleibt ein weggelassenes Feld unverändert, `null` leert ein Feld, das leer sein darf, und `null` auf einem Pflichtfeld wird mit 400 abgelehnt (statt still ignoriert oder als 500). Umgesetzt über `PartialType(..., { skipNullProperties: false })` in den Update-DTOs, `@IsOptionalNotNull()` (`src/common/validation/is-optional-not-null.ts`) für weglassbare, aber nicht leerbare Felder und `optionalDate()` (`src/common/patch-values.ts`) für leerbare Datumsfelder; `update-dto-null-handling.spec.ts` hält den Vertrag je DTO fest. Das Frontend sendet geleerte optionale Felder über `emptyToNull` (`ApiCore-Frontend/src/lib/forms/empty-to-null.ts`) als `null`. Für Regel-Configs gilt dasselbe Muster: `null` löscht einen optionalen Schlüssel (z. B. `dueInDays`, `windowDays`, `minGrams`, einzelne GTS-Schwellen), ein Pflichtschlüssel (z. B. `queenMaxAgeYears`, `notify`, die Gruppe `swarmSeason`) lehnt `null` mit 400 ab (Abschnitt 11.2). Neu leerbar sind `Colony.occupiedFrames`, `VarroaMeasurement.sampleBees` und `Inspection.feedStatus`.
 21. **Lebende Völker**: „Lebend“ heißt jeder Status außer `DISSOLVED`, `SOLD`, `DECEASED`, `MERGED` – also auch `WEAK`, `CONSPICUOUS`, `QUEENLESS`. Backend-Abfragen filtern über `LIVING_COLONY_WHERE` (`colonies/colony-status.ts`), das Frontend über `isLivingColony` (`lib/colonies/status.ts`); `status = ACTIVE` steht nur dort, wo wirklich genau dieser Status gemeint ist.
-22. **Schlüsselbund**: Jeder Zweck hat einen eigenen Schlüssel, nie ein JWT-Secret: `MFA_ENCRYPTION_KEY` (TOTP-Secrets), `WEBHOOK_ENCRYPTION_KEY` (Webhook-Signaturschlüssel), `BACKUP_ENCRYPTION_KEY` (Backup-Dateien). In Produktion Pflicht: je ≥ 32 Zeichen, paarweise verschieden und verschieden von `JWT_ACCESS_SECRET`/`JWT_REFRESH_SECRET` – sonst startet kein Prozess (`src/runtime/startup-checks.ts`). Außerhalb der Produktion fällt ein fehlender Schlüssel je Zweck auf eine Ableitung aus `JWT_ACCESS_SECRET` zurück. Format `k<8 hex>:<iv>.<tag>.<data>` (Base64-Teile, AES-256-GCM, 128-Bit-Tag Pflicht); AES-Schlüssel = HKDF-SHA256(Secret, Salt `apicore-key-ring`, Info `apicore-<zweck>-v1`), Schlüssel-ID = `k` + die ersten 8 Hex-Zeichen von sha256(Schlüssel). Backups behalten Dateiformat v3 und ihre bisherige Ableitung (`keyId` 12 Hex), folgen aber denselben Ring-Regeln. Code: `src/common/crypto/key-ring.ts`. In Produktion lehnt der Start außerdem Platzhalterwerte ab (`change-me…`, ohne Groß-/Kleinschreibung) – für beide JWT-Secrets, die drei Schlüssel und ihre `*_PREVIOUS`, ein gesetztes `OIDC_CLIENT_SECRET` und das Passwort in `DATABASE_URL`; auch `*_PREVIOUS` muss von den JWT-Secrets verschieden sein. Außerhalb der Produktion meldet jeder Prozess einmal je Variable, dass ein aus `JWT_ACCESS_SECRET` abgeleiteter Entwicklungsschlüssel einspringt.
+22. **Schlüsselbund**: Jeder Zweck hat einen eigenen Schlüssel, nie ein JWT-Secret: `MFA_ENCRYPTION_KEY` (TOTP-Secrets), `WEBHOOK_ENCRYPTION_KEY` (Webhook-Signaturschlüssel), `BACKUP_ENCRYPTION_KEY` (Backup-Dateien), `VOICE_ENCRYPTION_KEY` (Sprachnotizen: Transkript, Vorschlag, Aufnahme; seit T7, AAD `capture:<id>:<art>`). In Produktion Pflicht: je ≥ 32 Zeichen, paarweise verschieden und verschieden von `JWT_ACCESS_SECRET`/`JWT_REFRESH_SECRET` – sonst startet kein Prozess (`src/runtime/startup-checks.ts`). Außerhalb der Produktion fällt ein fehlender Schlüssel je Zweck auf eine Ableitung aus `JWT_ACCESS_SECRET` zurück. Format `k<8 hex>:<iv>.<tag>.<data>` (Base64-Teile, AES-256-GCM, 128-Bit-Tag Pflicht); AES-Schlüssel = HKDF-SHA256(Secret, Salt `apicore-key-ring`, Info `apicore-<zweck>-v1`), Schlüssel-ID = `k` + die ersten 8 Hex-Zeichen von sha256(Schlüssel). Backups behalten Dateiformat v3 und ihre bisherige Ableitung (`keyId` 12 Hex), folgen aber denselben Ring-Regeln. Code: `src/common/crypto/key-ring.ts`. In Produktion lehnt der Start außerdem Platzhalterwerte ab (`change-me…`, ohne Groß-/Kleinschreibung) – für beide JWT-Secrets, die vier Schlüssel und ihre `*_PREVIOUS`, ein gesetztes `OIDC_CLIENT_SECRET` und das Passwort in `DATABASE_URL`; auch `*_PREVIOUS` muss von den JWT-Secrets verschieden sein. Außerhalb der Produktion meldet jeder Prozess einmal je Variable, dass ein aus `JWT_ACCESS_SECRET` abgeleiteter Entwicklungsschlüssel einspringt. Der Job `rekey` versiegelt beim Schlüsseltausch nur offene Sprachnotizen neu (bestätigte, verworfene und abgelaufene haben keinen Inhalt mehr). **Rollout:** Ein Image mit T7 startet in Produktion in keiner Rolle ohne `VOICE_ENCRYPTION_KEY` in `apicore-backend-secret`; vorher `deploy/k8s/scripts/ensure-secrets.sh` ausführen und den Schlüssel wie die anderen sichern.
 23. **Öffentliche Herkunftsseite ohne Standort**: Sie nennt nur `Apiary.publicLocationLabel` (je Stand, z. B. „Nordhessen“) und `SiteSettings.originCountry`. Name, Ort, Adresse und Koordinaten eines Stands werden nie öffentlich ausgeliefert (Diebstahlschutz). Ohne Label erscheint nur das Land. Eine Label-Änderung kann am Edge bis zu 1 h verzögert sichtbar werden.
 **Rotation über `*_PREVIOUS`:** alten Wert nach `<NAME>_PREVIOUS` (öffnet weiter, versiegelt nie), neuen `<NAME>` setzen, api und worker neu starten (sonst versiegeln sie weiter mit dem alten Schlüssel), Job `rekey` laufen lassen; danach muss `rekey --dry-run` bei `rekeyed`, `plaintextSealed`, `changedMeanwhile` und `failed` 0 melden, erst dann `*_PREVIOUS` entfernen. Backup-Dateien werden nicht umgeschlüsselt: `BACKUP_ENCRYPTION_KEY_PREVIOUS` bleibt gesetzt, solange ältere Dateien einspielbar sein sollen.
 **Altchiffrate sind nur lesbar** (nie geschrieben), **und nur, solange `JWT_ACCESS_SECRET` unverändert ist**: MFA-Secrets ohne Präfix und Webhook-Secrets mit `enc:v1:` (beide AES-Schlüssel sha256(`JWT_ACCESS_SECRET`)), Webhook-Secrets im Klartext, Backup-Dateien mit JWT-abgeleiteter `keyId`. Liest ein Prozess ein solches MFA- oder Webhook-Secret, warnt er einmal je Zweck „legacy ciphertext read – run the rekey job“ (ohne Werte). Reihenfolge darum: Schlüssel setzen → `rekey` → neues Backup ziehen → erst dann die JWT-Secrets rotieren (alle Sitzungen enden einmal; JWT-versiegelte Backup-Dateien sind danach nicht mehr einspielbar).
diff --git a/ApiCore-Backend/.env.example b/ApiCore-Backend/.env.example
index 98359ad..3b65b95 100644
--- a/ApiCore-Backend/.env.example
+++ b/ApiCore-Backend/.env.example
@@ -82,9 +82,12 @@ BACKUP_RETENTION_COUNT=14
 # MFA_ENCRYPTION_KEY=""
 # WEBHOOK_ENCRYPTION_KEY=""
 # BACKUP_ENCRYPTION_KEY=""
+# Seals voice notes (audio, transcripts, suggestions); required in production.
+# VOICE_ENCRYPTION_KEY=""
 # MFA_ENCRYPTION_KEY_PREVIOUS=""
 # WEBHOOK_ENCRYPTION_KEY_PREVIOUS=""
 # BACKUP_ENCRYPTION_KEY_PREVIOUS=""
+# VOICE_ENCRYPTION_KEY_PREVIOUS=""
 
 # Entra ID SSO. Ohne alle vier Werte bleibt SSO deaktiviert
 # (GET /api/v1/auth/sso/status meldet enabled: false, kein Fehler beim Start).
diff --git a/ApiCore-Backend/src/common/crypto/key-ring.ts b/ApiCore-Backend/src/common/crypto/key-ring.ts
index 1ba5235..d9e6ede 100644
--- a/ApiCore-Backend/src/common/crypto/key-ring.ts
+++ b/ApiCore-Backend/src/common/crypto/key-ring.ts
@@ -9,7 +9,7 @@ import {
 
 /**
  * Secrets the server must read back (TOTP secrets, webhook signing secrets,
- * backup files) are encrypted with a key of their own per purpose, never
+ * voice notes, backup files) are encrypted with a key of their own per purpose, never
  * with a JWT secret. Each purpose has a key ring: the current key from
  * `<VARIABLE>` seals, the previous one from `<VARIABLE>_PREVIOUS` still
  * opens, so a key can be rotated without losing data. A sealed value names
@@ -33,13 +33,14 @@ export const ENCRYPTION_KEY_VARIABLES = {
   mfa: 'MFA_ENCRYPTION_KEY',
   webhook: 'WEBHOOK_ENCRYPTION_KEY',
   backup: 'BACKUP_ENCRYPTION_KEY',
+  voice: 'VOICE_ENCRYPTION_KEY',
 } as const;
 
 export type EncryptionKeyVariable =
   (typeof ENCRYPTION_KEY_VARIABLES)[keyof typeof ENCRYPTION_KEY_VARIABLES];
 
 /** Purposes sealed in the `k…:` string format; backups have their own envelope (backup-crypto.ts). */
-export type SecretPurpose = 'mfa' | 'webhook';
+export type SecretPurpose = 'mfa' | 'webhook' | 'voice';
 
 export interface RingKey {
   id: string;
diff --git a/ApiCore-Backend/src/jobs/rekey.job.spec.ts b/ApiCore-Backend/src/jobs/rekey.job.spec.ts
index 815fbf9..ed33257 100644
--- a/ApiCore-Backend/src/jobs/rekey.job.spec.ts
+++ b/ApiCore-Backend/src/jobs/rekey.job.spec.ts
@@ -10,6 +10,14 @@ import {
   openWebhookSecret,
   sealWebhookSecret,
 } from '../webhooks/webhook-secret';
+import {
+  isVoiceSealedWithCurrentKey,
+  openVoiceBytes,
+  openVoiceText,
+  sealVoiceBytes,
+  sealVoiceText,
+  voiceAad,
+} from '../voice/core/voice-crypto';
 import { RekeyJob } from './rekey.job';
 
 // Written by the code before the key ring, with JWT_ACCESS_SECRET = 'x' * 40
@@ -67,11 +75,139 @@ function sealedWithPrevious(variable: string, seal: () => string): string {
   }
 }
 
+interface CaptureRow {
+  id: string;
+  status: string;
+  transcriptEnc: string | null;
+  suggestionEnc: string | null;
+}
+
+interface AudioRow {
+  captureId: string;
+  dataEnc: Buffer;
+}
+
+interface VoiceFixture {
+  captures: CaptureRow[];
+  audio: AudioRow[];
+}
+
+interface StatusFilter {
+  status?: { notIn: string[] };
+  capture?: { status: { notIn: string[] } };
+  transcriptEnc?: { not: null } | string;
+  suggestionEnc?: { not: null } | string;
+}
+
+interface CaptureUpdate {
+  where: { id: string; status: { notIn: string[] } } & Record<string, unknown>;
+  data: Record<string, string>;
+}
+
+interface AudioUpdate {
+  where: {
+    captureId: string;
+    dataEnc: Buffer;
+    capture: { status: { notIn: string[] } };
+  };
+  data: { dataEnc: Buffer };
+}
+
+/** The voice tables, in memory, with the where-shapes the job uses. */
+function fakeVoice({ captures, audio }: VoiceFixture) {
+  const captureRows = new Map(captures.map((row) => [row.id, { ...row }]));
+  const audioRows = new Map(audio.map((row) => [row.captureId, { ...row }]));
+  const open = (id: string, notIn: string[]): boolean => {
+    const row = captureRows.get(id);
+    return row !== undefined && !notIn.includes(row.status);
+  };
+  const voiceCapture = {
+    findMany: jest.fn(({ where }: { where: StatusFilter }) =>
+      Promise.resolve(
+        [...captureRows.values()].filter(
+          (row) =>
+            open(row.id, where.status?.notIn ?? []) &&
+            (where.transcriptEnc === undefined || row.transcriptEnc !== null) &&
+            (where.suggestionEnc === undefined || row.suggestionEnc !== null),
+        ),
+      ),
+    ),
+    updateMany: jest.fn<Promise<UpdateResult>, [CaptureUpdate]>(
+      ({ where, data }) => {
+        const row = captureRows.get(where.id);
+        const column =
+          'transcriptEnc' in where ? 'transcriptEnc' : 'suggestionEnc';
+        if (
+          !row ||
+          !open(where.id, where.status.notIn) ||
+          row[column] !== where[column]
+        ) {
+          return Promise.resolve({ count: 0 });
+        }
+        captureRows.set(where.id, { ...row, [column]: data[column] });
+        return Promise.resolve({ count: 1 });
+      },
+    ),
+  };
+  const voiceCaptureAudio = {
+    findMany: jest.fn(({ where }: { where: StatusFilter }) =>
+      Promise.resolve(
+        [...audioRows.values()]
+          .filter((row) =>
+            open(row.captureId, where.capture?.status.notIn ?? []),
+          )
+          .map((row) => ({ captureId: row.captureId })),
+      ),
+    ),
+    findFirst: jest.fn(
+      ({ where }: { where: { captureId: string } & StatusFilter }) => {
+        const row = audioRows.get(where.captureId);
+        return Promise.resolve(
+          row && open(row.captureId, where.capture?.status.notIn ?? [])
+            ? { ...row }
+            : null,
+        );
+      },
+    ),
+    updateMany: jest.fn<Promise<UpdateResult>, [AudioUpdate]>(
+      ({ where, data }) => {
+        const row = audioRows.get(where.captureId);
+        if (
+          !row ||
+          !open(where.captureId, where.capture.status.notIn) ||
+          !row.dataEnc.equals(where.dataEnc)
+        ) {
+          return Promise.resolve({ count: 0 });
+        }
+        audioRows.set(where.captureId, { ...row, dataEnc: data.dataEnc });
+        return Promise.resolve({ count: 1 });
+      },
+    ),
+  };
+  return {
+    voiceCapture,
+    voiceCaptureAudio,
+    transcript: (id: string): string =>
+      captureRows.get(id)?.transcriptEnc ?? '',
+    suggestion: (id: string): string =>
+      captureRows.get(id)?.suggestionEnc ?? '',
+    audio: (id: string): Buffer =>
+      audioRows.get(id)?.dataEnc ?? Buffer.alloc(0),
+    captureRows,
+    audioRows,
+  };
+}
+
 /**
- * The two tables, in memory. updateMany behaves like the SQL compare-and-
+ * The tables, in memory. updateMany behaves like the SQL compare-and-
  * swap: it writes only while id and old value still match.
  */
-function fakeDb(users: UserRow[], subscriptions: SubscriptionRow[]) {
+function fakeDb(
+  users: UserRow[],
+  subscriptions: SubscriptionRow[],
+  voiceFixture: VoiceFixture = { captures: [], audio: [] },
+) {
+  const voice = fakeVoice(voiceFixture);
   const userRows = new Map(users.map((row) => [row.id, row]));
   const subscriptionRows = new Map(subscriptions.map((row) => [row.id, row]));
   const user = {
@@ -105,9 +241,15 @@ function fakeDb(users: UserRow[], subscriptions: SubscriptionRow[]) {
     ),
   };
   return {
-    prisma: { user, webhookSubscription } as unknown as PrismaService,
+    prisma: {
+      user,
+      webhookSubscription,
+      voiceCapture: voice.voiceCapture,
+      voiceCaptureAudio: voice.voiceCaptureAudio,
+    } as unknown as PrismaService,
     user,
     webhookSubscription,
+    voice,
     userRows,
     subscriptionRows,
     mfaSecret: (id: string): string => userRows.get(id)?.mfaSecret ?? '',
@@ -118,6 +260,15 @@ function fakeDb(users: UserRow[], subscriptions: SubscriptionRow[]) {
 
 const keyIdOf = (stored: string): string => stored.split(':')[0];
 
+const NO_VOICE = {
+  'voice.total': 0,
+  'voice.rekeyed': 0,
+  'voice.alreadyCurrent': 0,
+  'voice.plaintextSealed': 0,
+  'voice.changedMeanwhile': 0,
+  'voice.failed': 0,
+};
+
 describe('RekeyJob', () => {
   const originalEnv = { ...process.env };
   let warn: jest.SpyInstance<void, unknown[]>;
@@ -129,6 +280,8 @@ describe('RekeyJob', () => {
     process.env.MFA_ENCRYPTION_KEY_PREVIOUS = 'n'.repeat(40);
     process.env.WEBHOOK_ENCRYPTION_KEY = 'w'.repeat(40);
     process.env.WEBHOOK_ENCRYPTION_KEY_PREVIOUS = 'v'.repeat(40);
+    process.env.VOICE_ENCRYPTION_KEY = 'c'.repeat(40);
+    process.env.VOICE_ENCRYPTION_KEY_PREVIOUS = 'p'.repeat(40);
     warn = jest
       .spyOn(Logger.prototype, 'warn')
       .mockImplementation(() => undefined);
@@ -192,6 +345,7 @@ describe('RekeyJob', () => {
       'webhook.plaintextSealed': 1,
       'webhook.changedMeanwhile': 0,
       'webhook.failed': 0,
+      ...NO_VOICE,
     };
 
     it('rekeys legacy MFA and webhook secrets and seals legacy plaintext webhook secrets', async () => {
@@ -411,7 +565,7 @@ describe('RekeyJob', () => {
 
     it('dry-run opens them and fails the run on a value that does not open', async () => {
       await expect(new RekeyJob(db.prisma).run(['--dry-run'])).rejects.toThrow(
-        /^rekey: 2 secret\(s\) could not be rekeyed - dryRun=true, mfa\.total=2, mfa\.rekeyed=0, mfa\.alreadyCurrent=1, .*mfa\.failed=1, webhook\.total=2, webhook\.rekeyed=0, webhook\.alreadyCurrent=1, .*webhook\.failed=1$/,
+        /^rekey: 2 secret\(s\) could not be rekeyed - dryRun=true, mfa\.total=2, mfa\.rekeyed=0, mfa\.alreadyCurrent=1, .*mfa\.failed=1, webhook\.total=2, webhook\.rekeyed=0, webhook\.alreadyCurrent=1, .*webhook\.failed=1, voice\..*$/,
       );
       expect(db.user.updateMany).not.toHaveBeenCalled();
       expect(db.webhookSubscription.updateMany).not.toHaveBeenCalled();
@@ -490,7 +644,7 @@ describe('RekeyJob', () => {
 
     it('dry-run reports them too and writes nothing', async () => {
       await expect(new RekeyJob(db.prisma).run(['--dry-run'])).rejects.toThrow(
-        /^rekey: 3 secret\(s\) could not be rekeyed - dryRun=true, .*mfa\.rekeyed=1, .*mfa\.failed=2, .*webhook\.plaintextSealed=1, .*webhook\.failed=1$/,
+        /^rekey: 3 secret\(s\) could not be rekeyed - dryRun=true, .*mfa\.rekeyed=1, .*mfa\.failed=2, .*webhook\.plaintextSealed=1, .*webhook\.failed=1, voice\..*$/,
       );
       expect(db.user.updateMany).not.toHaveBeenCalled();
       expect(db.webhookSubscription.updateMany).not.toHaveBeenCalled();
@@ -566,4 +720,253 @@ describe('RekeyJob', () => {
       expect(db.user.findMany).not.toHaveBeenCalled();
     },
   );
+
+  describe('voice content', () => {
+    const TRANSCRIPT = 'Koenigin gesehen, acht Waben besetzt';
+    const SUGGESTION = '{"suggestions":[{"field":"queenSeen"}]}';
+    const AUDIO = Buffer.from([0x1a, 0x45, 0xdf, 0xa3, 9, 8, 7]);
+
+    /** Seals with the key that VOICE_ENCRYPTION_KEY_PREVIOUS names, as before a rotation. */
+    function underPrevious<T>(seal: () => T): T {
+      const current = process.env.VOICE_ENCRYPTION_KEY;
+      process.env.VOICE_ENCRYPTION_KEY =
+        process.env.VOICE_ENCRYPTION_KEY_PREVIOUS;
+      try {
+        return seal();
+      } finally {
+        process.env.VOICE_ENCRYPTION_KEY = current;
+      }
+    }
+
+    function openFixture(): ReturnType<typeof fakeDb> {
+      return fakeDb([], [], {
+        captures: [
+          {
+            // READY, everything under the previous key.
+            id: 'c1',
+            status: 'READY',
+            transcriptEnc: underPrevious(() =>
+              sealVoiceText(TRANSCRIPT, voiceAad('c1', 'transcript')),
+            ),
+            suggestionEnc: underPrevious(() =>
+              sealVoiceText(SUGGESTION, voiceAad('c1', 'suggestion')),
+            ),
+          },
+          {
+            // QUEUED, audio under the previous key, no text yet.
+            id: 'c2',
+            status: 'QUEUED',
+            transcriptEnc: null,
+            suggestionEnc: null,
+          },
+          {
+            // TRANSCRIBED, already current.
+            id: 'c3',
+            status: 'TRANSCRIBED',
+            transcriptEnc: sealVoiceText(
+              TRANSCRIPT,
+              voiceAad('c3', 'transcript'),
+            ),
+            suggestionEnc: null,
+          },
+          {
+            // CONFIRMED rows hold no content any more; a leftover is not touched.
+            id: 'c4',
+            status: 'CONFIRMED',
+            transcriptEnc: underPrevious(() =>
+              sealVoiceText(TRANSCRIPT, voiceAad('c4', 'transcript')),
+            ),
+            suggestionEnc: null,
+          },
+        ],
+        audio: [
+          {
+            captureId: 'c2',
+            dataEnc: underPrevious(() =>
+              sealVoiceBytes(AUDIO, voiceAad('c2', 'audio')),
+            ),
+          },
+          {
+            captureId: 'c4',
+            dataEnc: underPrevious(() =>
+              sealVoiceBytes(AUDIO, voiceAad('c4', 'audio')),
+            ),
+          },
+        ],
+      });
+    }
+
+    it('rekey reseals open voice content and skips confirmed rows', async () => {
+      const db = openFixture();
+      const confirmedTranscript = db.voice.transcript('c4');
+      const confirmedAudio = db.voice.audio('c4');
+
+      const result = await new RekeyJob(db.prisma).run([]);
+
+      // c1: transcript + suggestion, c2: audio, c3: already current.
+      expect(result).toMatchObject({
+        'voice.total': 4,
+        'voice.rekeyed': 3,
+        'voice.alreadyCurrent': 1,
+        'voice.plaintextSealed': 0,
+        'voice.changedMeanwhile': 0,
+        'voice.failed': 0,
+      });
+      expect(isVoiceSealedWithCurrentKey(db.voice.transcript('c1'))).toBe(true);
+      expect(isVoiceSealedWithCurrentKey(db.voice.suggestion('c1'))).toBe(true);
+      expect(isVoiceSealedWithCurrentKey(db.voice.audio('c2'))).toBe(true);
+      expect(db.voice.transcript('c4')).toBe(confirmedTranscript);
+      expect(db.voice.audio('c4').equals(confirmedAudio)).toBe(true);
+      // Every filter excludes the three finished states.
+      expect(db.voice.voiceCapture.findMany).toHaveBeenCalledWith(
+        expect.objectContaining({
+          where: expect.objectContaining({
+            status: { notIn: ['CONFIRMED', 'DISCARDED', 'EXPIRED'] },
+          }) as unknown,
+        }),
+      );
+    });
+
+    it('leaves voice content that opens to the original after the previous key is gone', async () => {
+      const db = openFixture();
+      await new RekeyJob(db.prisma).run([]);
+      delete process.env.VOICE_ENCRYPTION_KEY_PREVIOUS;
+
+      expect(
+        openVoiceText(db.voice.transcript('c1'), voiceAad('c1', 'transcript')),
+      ).toBe(TRANSCRIPT);
+      expect(
+        openVoiceText(db.voice.suggestion('c1'), voiceAad('c1', 'suggestion')),
+      ).toBe(SUGGESTION);
+      expect(
+        openVoiceBytes(db.voice.audio('c2'), voiceAad('c2', 'audio')).equals(
+          AUDIO,
+        ),
+      ).toBe(true);
+    });
+
+    it('dry-run counts voice content and writes nothing', async () => {
+      const db = openFixture();
+      const before = db.voice.transcript('c1');
+
+      const result = await new RekeyJob(db.prisma).run(['--dry-run']);
+
+      expect(result).toMatchObject({
+        dryRun: true,
+        'voice.total': 4,
+        'voice.rekeyed': 3,
+        'voice.alreadyCurrent': 1,
+      });
+      expect(db.voice.voiceCapture.updateMany).not.toHaveBeenCalled();
+      expect(db.voice.voiceCaptureAudio.updateMany).not.toHaveBeenCalled();
+      expect(db.voice.transcript('c1')).toBe(before);
+    });
+
+    it('does not overwrite voice content that changed since it was read', async () => {
+      const db = openFixture();
+      const newer = sealVoiceText('neu', voiceAad('c1', 'transcript'));
+      db.voice.voiceCapture.findMany.mockImplementationOnce(() => {
+        const read = [...db.voice.captureRows.values()]
+          .filter(
+            (row) => row.transcriptEnc !== null && row.status !== 'CONFIRMED',
+          )
+          .map((row) => ({ ...row }));
+        const row = db.voice.captureRows.get('c1');
+        if (row) {
+          db.voice.captureRows.set('c1', { ...row, transcriptEnc: newer });
+        }
+        return Promise.resolve(read);
+      });
+
+      const result = await new RekeyJob(db.prisma).run([]);
+
+      expect(result).toMatchObject({ 'voice.changedMeanwhile': 1 });
+      expect(db.voice.transcript('c1')).toBe(newer);
+    });
+
+    it('fails the run on a voice value that cannot be opened and never logs content', async () => {
+      const db = fakeDb([], [], {
+        captures: [
+          {
+            id: 'c1',
+            status: 'READY',
+            // Bound to another capture: does not authenticate here.
+            transcriptEnc: underPrevious(() =>
+              sealVoiceText(TRANSCRIPT, voiceAad('other', 'transcript')),
+            ),
+            suggestionEnc: null,
+          },
+        ],
+        audio: [],
+      });
+
+      const message = await new RekeyJob(db.prisma).run([]).then(
+        () => '',
+        (failure: Error) => failure.message,
+      );
+
+      expect(message).toContain('voice.failed=1');
+      expect(logged()).toContainEqual(
+        expect.stringContaining(
+          'VoiceCapture c1: voice secret not rekeyed: ciphertext failed authentication',
+        ),
+      );
+      for (const text of [message, ...logged()]) {
+        expect(text).not.toContain('Koenigin');
+      }
+    });
+
+    it('reads audio one blob at a time and never selects the data in the id listing', async () => {
+      const db = openFixture();
+
+      await new RekeyJob(db.prisma).run([]);
+
+      expect(db.voice.voiceCaptureAudio.findMany).toHaveBeenCalledWith(
+        expect.objectContaining({ select: { captureId: true } }),
+      );
+      expect(db.voice.voiceCaptureAudio.findFirst).toHaveBeenCalled();
+    });
+
+    it('does not write audio of a capture that was confirmed since it was read', async () => {
+      const db = openFixture();
+      const before = db.voice.audio('c2');
+      db.voice.voiceCaptureAudio.findFirst.mockImplementationOnce(
+        ({ where }: { where: { captureId: string } }) => {
+          const read = { captureId: where.captureId, dataEnc: before };
+          const row = db.voice.captureRows.get(where.captureId);
+          if (row) {
+            db.voice.captureRows.set(where.captureId, {
+              ...row,
+              status: 'CONFIRMED',
+            });
+          }
+          return Promise.resolve(read);
+        },
+      );
+
+      const result = await new RekeyJob(db.prisma).run([]);
+
+      expect(result).toMatchObject({ 'voice.changedMeanwhile': 1 });
+      expect(db.voice.audio('c2').equals(before)).toBe(true);
+      expect(db.voice.voiceCaptureAudio.updateMany).toHaveBeenCalledWith(
+        expect.objectContaining({
+          where: expect.objectContaining({
+            capture: {
+              status: { notIn: ['CONFIRMED', 'DISCARDED', 'EXPIRED'] },
+            },
+          }) as unknown,
+        }),
+      );
+    });
+
+    it('fails before reading any row when the voice key is unusable', async () => {
+      const db = openFixture();
+      process.env.VOICE_ENCRYPTION_KEY = 'too-short';
+
+      await expect(new RekeyJob(db.prisma).run([])).rejects.toThrow(
+        'VOICE_ENCRYPTION_KEY must be at least 32 characters',
+      );
+      expect(db.voice.voiceCapture.findMany).not.toHaveBeenCalled();
+    });
+  });
 });
diff --git a/ApiCore-Backend/src/jobs/rekey.job.ts b/ApiCore-Backend/src/jobs/rekey.job.ts
index 81631d2..2b39e2e 100644
--- a/ApiCore-Backend/src/jobs/rekey.job.ts
+++ b/ApiCore-Backend/src/jobs/rekey.job.ts
@@ -13,13 +13,29 @@ import {
   sealWebhookSecret,
   webhookSecretNeedsRekey,
 } from '../webhooks/webhook-secret';
+import { VoiceCaptureStatus } from '../../generated/prisma';
+import {
+  isVoiceSealedWithCurrentKey,
+  openVoiceBytes,
+  openVoiceText,
+  sealVoiceBytes,
+  sealVoiceText,
+  voiceAad,
+} from '../voice/core/voice-crypto';
 import { Job, JobResult } from './job';
 import { JobName } from './job-names';
 
 /** `rekey --dry-run`: open and count every secret, write none. */
 export const REKEY_DRY_RUN_ARG = '--dry-run';
 
-/** What one run did with the secrets of one purpose (mfa, webhook). */
+/** Voice content of these states is already deleted (or about to be) and is not resealed. */
+const FINISHED_VOICE_STATUSES: VoiceCaptureStatus[] = [
+  VoiceCaptureStatus.CONFIRMED,
+  VoiceCaptureStatus.DISCARDED,
+  VoiceCaptureStatus.EXPIRED,
+];
+
+/** What one run did with the secrets of one purpose (mfa, webhook, voice). */
 export interface RekeyCounts {
   /** Rows with a stored secret. */
   total: number;
@@ -51,6 +67,13 @@ interface SecretColumn {
   /** How log lines name a row: "<entity> <id>". */
   entity: string;
   read(): Promise<StoredSecret[]>;
+  /**
+   * Instead of read(): the ids first, then one row at a time with readOne(),
+   * so large values (audio) are never held all at once. readOne gives null
+   * for a row that is gone or no longer eligible.
+   */
+  readIds?(): Promise<string[]>;
+  readOne?(id: string): Promise<StoredSecret | null>;
   /**
    * Writes `next` only while the row still holds `previous` - one UPDATE
    * with both in its WHERE, so a value written meanwhile (a new MFA setup,
@@ -59,8 +82,9 @@ interface SecretColumn {
   swap(id: string, previous: string, next: string): Promise<boolean>;
   needsRekey(stored: string): boolean;
   isPlaintext(stored: string): boolean;
-  open(stored: string): string;
-  seal(plaintext: string): string;
+  /** `id` binds voice content to its row (associated data); the other purposes ignore it. */
+  open(stored: string, id: string): string;
+  seal(plaintext: string, id: string): string;
 }
 
 /** Refuses anything but --dry-run: a typo must never start the real run. */
@@ -87,6 +111,20 @@ function countOutcomes(outcomes: readonly RowOutcome[]): RekeyCounts {
   };
 }
 
+/** Sums the counts of columns that share one purpose (voice has three). */
+function sumCounts(all: readonly RekeyCounts[]): RekeyCounts {
+  const sum = (key: keyof RekeyCounts): number =>
+    all.reduce((total, each) => total + each[key], 0);
+  return {
+    total: sum('total'),
+    rekeyed: sum('rekeyed'),
+    alreadyCurrent: sum('alreadyCurrent'),
+    plaintextSealed: sum('plaintextSealed'),
+    changedMeanwhile: sum('changedMeanwhile'),
+    failed: sum('failed'),
+  };
+}
+
 /** `{ dryRun, 'mfa.total', …, 'webhook.failed' }` - counts only, never values. */
 function toJobResult(
   dryRun: boolean,
@@ -112,7 +150,8 @@ function describeResult(result: JobResult): string {
 }
 
 /**
- * Reseals every stored MFA (TOTP) and webhook signing secret with the
+ * Reseals every stored MFA (TOTP) and webhook signing secret, and the
+ * content of open voice notes (transcript, suggestion, audio), with the
  * current key of its purpose (common/crypto/key-ring.ts): values sealed
  * with `*_PREVIOUS` or before the key ring (MFA without key id, webhook
  * `enc:v1:`, both under sha256(JWT_ACCESS_SECRET)), and webhook secrets
@@ -135,15 +174,30 @@ export class RekeyJob implements Job {
 
   async run(args: readonly string[]): Promise<JobResult> {
     const dryRun = isDryRun(args);
-    const columns = [this.mfaColumn(), this.webhookColumn()];
+    const columns = [
+      this.mfaColumn(),
+      this.webhookColumn(),
+      ...this.voiceColumns(),
+    ];
     // A key that is set but unusable fails the run before any row is read.
-    for (const column of columns) {
-      loadKeyRing(column.purpose);
+    for (const purpose of new Set(columns.map((column) => column.purpose))) {
+      loadKeyRing(purpose);
     }
-    const counts: (readonly [SecretPurpose, RekeyCounts])[] = [];
+    const perColumn: (readonly [SecretPurpose, RekeyCounts])[] = [];
     for (const column of columns) {
-      counts.push([column.purpose, await this.rekeyColumn(column, dryRun)]);
+      perColumn.push([column.purpose, await this.rekeyColumn(column, dryRun)]);
     }
+    const counts = (['mfa', 'webhook', 'voice'] as const).map(
+      (purpose) =>
+        [
+          purpose,
+          sumCounts(
+            perColumn
+              .filter(([each]) => each === purpose)
+              .map(([, each]) => each),
+          ),
+        ] as const,
+    );
     const result = toJobResult(dryRun, counts);
     const failed = counts.reduce((sum, [, each]) => sum + each.failed, 0);
     if (failed > 0) {
@@ -158,9 +212,17 @@ export class RekeyJob implements Job {
     column: SecretColumn,
     dryRun: boolean,
   ): Promise<RekeyCounts> {
-    const rows = await column.read();
     const outcomes: RowOutcome[] = [];
-    for (const row of rows) {
+    if (column.readIds && column.readOne) {
+      for (const id of await column.readIds()) {
+        const row = await column.readOne(id);
+        if (row !== null) {
+          outcomes.push(await this.rekeyRow(column, row, dryRun));
+        }
+      }
+      return countOutcomes(outcomes);
+    }
+    for (const row of await column.read()) {
       outcomes.push(await this.rekeyRow(column, row, dryRun));
     }
     return countOutcomes(outcomes);
@@ -185,13 +247,13 @@ export class RekeyJob implements Job {
     const subject = `${column.entity} ${row.id}: ${column.purpose} secret`;
     try {
       // Opened in a dry-run too: it reports what a real run could not reseal.
-      const plaintext = column.open(row.stored);
+      const plaintext = column.open(row.stored, row.id);
       if (dryRun) {
         return outcome;
       }
-      const resealed = column.seal(plaintext);
+      const resealed = column.seal(plaintext, row.id);
       // The swap replaces the only copy of the old value.
-      if (column.open(resealed) !== plaintext) {
+      if (column.open(resealed, row.id) !== plaintext) {
         throw new Error('resealed secret does not open to the same value');
       }
       if (await column.swap(row.id, row.stored, resealed)) {
@@ -262,4 +324,96 @@ export class RekeyJob implements Job {
       seal: sealWebhookSecret,
     };
   }
+
+  /**
+   * Transcript, suggestion and audio of open voice notes. Audio is handled
+   * as base64 text so it shares the row logic; it is read only for open
+   * notes (at most a few small files).
+   */
+  private voiceColumns(): SecretColumn[] {
+    const openStatus = { notIn: FINISHED_VOICE_STATUSES };
+    const textColumn = (
+      field: 'transcriptEnc' | 'suggestionEnc',
+      kind: 'transcript' | 'suggestion',
+    ): SecretColumn => ({
+      purpose: 'voice',
+      entity: 'VoiceCapture',
+      read: async () => {
+        const rows = await this.prisma.voiceCapture.findMany({
+          where: { status: openStatus, [field]: { not: null } },
+          select: { id: true, [field]: true },
+          orderBy: { id: 'asc' },
+        });
+        return rows.flatMap((row) => {
+          const stored = row[field];
+          return typeof stored === 'string' ? [{ id: row.id, stored }] : [];
+        });
+      },
+      swap: async (id, previous, next) => {
+        const { count } = await this.prisma.voiceCapture.updateMany({
+          where: { id, status: openStatus, [field]: previous },
+          data: { [field]: next },
+        });
+        return count === 1;
+      },
+      needsRekey: (stored) => !isVoiceSealedWithCurrentKey(stored),
+      isPlaintext: () => false,
+      open: (stored, id) => openVoiceText(stored, voiceAad(id, kind)),
+      seal: (plaintext, id) => sealVoiceText(plaintext, voiceAad(id, kind)),
+    });
+    const audioColumn: SecretColumn = {
+      purpose: 'voice',
+      entity: 'VoiceCapture',
+      read: () => Promise.resolve([]),
+      readIds: async () => {
+        const rows = await this.prisma.voiceCaptureAudio.findMany({
+          where: { capture: { status: openStatus } },
+          select: { captureId: true },
+          orderBy: { captureId: 'asc' },
+        });
+        return rows.map((row) => row.captureId);
+      },
+      readOne: async (id) => {
+        const row = await this.prisma.voiceCaptureAudio.findFirst({
+          where: { captureId: id, capture: { status: openStatus } },
+          select: { captureId: true, dataEnc: true },
+        });
+        return row
+          ? {
+              id: row.captureId,
+              stored: Buffer.from(row.dataEnc).toString('base64'),
+            }
+          : null;
+      },
+      swap: async (id, previous, next) => {
+        const { count } = await this.prisma.voiceCaptureAudio.updateMany({
+          where: {
+            captureId: id,
+            dataEnc: Buffer.from(previous, 'base64'),
+            capture: { status: openStatus },
+          },
+          data: { dataEnc: Buffer.from(next, 'base64') },
+        });
+        return count === 1;
+      },
+      needsRekey: (stored) =>
+        !isVoiceSealedWithCurrentKey(Buffer.from(stored, 'base64')),
+      isPlaintext: () => false,
+      open: (stored, id) =>
+        openVoiceBytes(
+          Buffer.from(stored, 'base64'),
+          voiceAad(id, 'audio'),
+        ).toString('base64'),
+      seal: (plaintext, id) =>
+        sealVoiceBytes(
+          Buffer.from(plaintext, 'base64'),
+          voiceAad(id, 'audio'),
+        ).toString('base64'),
+    };
+    return [
+      textColumn('transcriptEnc', 'transcript'),
+      textColumn('suggestionEnc', 'suggestion'),
+      audioColumn,
+    ];
+  }
 }
diff --git a/ApiCore-Backend/src/runtime/startup-checks.spec.ts b/ApiCore-Backend/src/runtime/startup-checks.spec.ts
index 8891aba..ffcbf3b 100644
--- a/ApiCore-Backend/src/runtime/startup-checks.spec.ts
+++ b/ApiCore-Backend/src/runtime/startup-checks.spec.ts
@@ -6,6 +6,7 @@ const KEYS = {
   MFA_ENCRYPTION_KEY: 'm'.repeat(32),
   WEBHOOK_ENCRYPTION_KEY: 'w'.repeat(32),
   BACKUP_ENCRYPTION_KEY: 'b'.repeat(32),
+  VOICE_ENCRYPTION_KEY: 'v'.repeat(32),
 };
 const PROD_ENV = {
   ...BASE_ENV,
@@ -81,16 +82,17 @@ describe('assertStartupEnvironment', () => {
   });
 
   describe('encryption keys', () => {
-    it('production refuses to start without MFA_/WEBHOOK_/BACKUP_ENCRYPTION_KEY', () => {
+    it('production refuses to start without MFA_/WEBHOOK_/BACKUP_/VOICE_ENCRYPTION_KEY', () => {
       expect(() =>
         assertStartupEnvironment('worker', {
           ...PROD_ENV,
           MFA_ENCRYPTION_KEY: undefined,
           WEBHOOK_ENCRYPTION_KEY: undefined,
           BACKUP_ENCRYPTION_KEY: undefined,
+          VOICE_ENCRYPTION_KEY: undefined,
         }),
       ).toThrow(
-        'Missing required environment variable(s): MFA_ENCRYPTION_KEY, WEBHOOK_ENCRYPTION_KEY, BACKUP_ENCRYPTION_KEY',
+        'Missing required environment variable(s): MFA_ENCRYPTION_KEY, WEBHOOK_ENCRYPTION_KEY, BACKUP_ENCRYPTION_KEY, VOICE_ENCRYPTION_KEY',
       );
       expect(() =>
         assertStartupEnvironment('job', {
@@ -126,7 +128,7 @@ describe('assertStartupEnvironment', () => {
           WEBHOOK_ENCRYPTION_KEY: KEYS.MFA_ENCRYPTION_KEY,
         }),
       ).toThrow(
-        'MFA_ENCRYPTION_KEY, WEBHOOK_ENCRYPTION_KEY and BACKUP_ENCRYPTION_KEY must be pairwise different',
+        'MFA_ENCRYPTION_KEY, WEBHOOK_ENCRYPTION_KEY, BACKUP_ENCRYPTION_KEY and VOICE_ENCRYPTION_KEY must be pairwise different',
       );
       expect(() =>
         assertStartupEnvironment('api', {
@@ -198,9 +200,11 @@ describe('assertStartupEnvironment', () => {
       'MFA_ENCRYPTION_KEY',
       'WEBHOOK_ENCRYPTION_KEY',
       'BACKUP_ENCRYPTION_KEY',
+      'VOICE_ENCRYPTION_KEY',
       'MFA_ENCRYPTION_KEY_PREVIOUS',
       'WEBHOOK_ENCRYPTION_KEY_PREVIOUS',
       'BACKUP_ENCRYPTION_KEY_PREVIOUS',
+      'VOICE_ENCRYPTION_KEY_PREVIOUS',
     ])('production refuses a change-me placeholder in %s', (name) => {
       expect(() =>
         assertStartupEnvironment('api', { ...PROD_ENV, [name]: PLACEHOLDER }),
@@ -360,4 +364,70 @@ describe('assertStartupEnvironment', () => {
       ).not.toThrow();
     });
   });
+
+  describe('voice', () => {
+    it('production requires VOICE_ENCRYPTION_KEY distinct from the others', () => {
+      expect(() =>
+        assertStartupEnvironment('api', {
+          ...PROD_ENV,
+          VOICE_ENCRYPTION_KEY: undefined,
+        }),
+      ).toThrow(
+        'Missing required environment variable(s): VOICE_ENCRYPTION_KEY',
+      );
+      for (const other of [
+        'MFA_ENCRYPTION_KEY',
+        'WEBHOOK_ENCRYPTION_KEY',
+        'BACKUP_ENCRYPTION_KEY',
+      ] as const) {
+        expect(() =>
+          assertStartupEnvironment('job', {
+            ...PROD_ENV,
+            VOICE_ENCRYPTION_KEY: KEYS[other],
+          }),
+        ).toThrow('must be pairwise different');
+      }
+      expect(() =>
+        assertStartupEnvironment('worker', {
+          ...PROD_ENV,
+          VOICE_ENCRYPTION_KEY: PROD_ENV.JWT_REFRESH_SECRET,
+        }),
+      ).toThrow(
+        'VOICE_ENCRYPTION_KEY must differ from JWT_ACCESS_SECRET and JWT_REFRESH_SECRET',
+      );
+    });
+
+    it('rejects a change-me VOICE_ENCRYPTION_KEY in production', () => {
+      expect(() =>
+        assertStartupEnvironment('api', {
+          ...PROD_ENV,
+          VOICE_ENCRYPTION_KEY: 'change-me-to-a-fifth-random-value-32-chars',
+        }),
+      ).toThrow(
+        'Secret(s) still set to an example placeholder: VOICE_ENCRYPTION_KEY',
+      );
+    });
+
+    it('refuses an unknown VOICE_MODEL in every role', () => {
+      for (const role of ['api', 'worker', 'job', 'all'] as const) {
+        expect(() =>
+          assertStartupEnvironment(role, {
+            ...PROD_ENV,
+            VOICE_MODEL: 'claude-unknown',
+          }),
+        ).toThrow('VOICE_MODEL must be one of');
+      }
+    });
+
+    it('a bad ANTHROPIC_API_KEY never stops a pod', () => {
+      for (const role of ['api', 'worker', 'job', 'all'] as const) {
+        expect(() =>
+          assertStartupEnvironment(role, {
+            ...PROD_ENV,
+            ANTHROPIC_API_KEY: 'change-me-anthropic',
+          }),
+        ).not.toThrow();
+      }
+    });
+  });
 });
diff --git a/ApiCore-Backend/src/runtime/startup-checks.ts b/ApiCore-Backend/src/runtime/startup-checks.ts
index 8f0f4f1..d7fa9d5 100644
--- a/ApiCore-Backend/src/runtime/startup-checks.ts
+++ b/ApiCore-Backend/src/runtime/startup-checks.ts
@@ -4,6 +4,8 @@ import {
   readRingSecrets,
 } from '../common/crypto/key-ring';
 import { assertTelegramToken } from '../telegram/telegram-config';
+import { assertAnthropicKey } from '../voice/anthropic-config';
+import { voiceConfig } from '../voice/voice-config';
 import type { ApicoreRole } from './role';
 
 const REQUIRED_ENV_VARS = ['DATABASE_URL', 'JWT_ACCESS_SECRET'] as const;
@@ -132,8 +134,9 @@ function assertEncryptionKeys(env: NodeJS.ProcessEnv): void {
 /**
  * Startup checks shared by every entry point (API, worker, CLI job). All
  * roles load the same modules and secrets today, so the checks hardly differ
- * per role; the Telegram bot token is the first role-specific one (only the
- * worker holds it).
+ * per role; the Telegram bot token and the Anthropic key are role-specific
+ * (only the worker holds them, both optional). The voice settings are
+ * validated in every role: a mistyped model id stops the pod, not a night job.
  */
 export function assertStartupEnvironment(
   role: ApicoreRole,
@@ -144,4 +147,6 @@ export function assertStartupEnvironment(
   assertNoPlaceholderSecrets(env);
   assertEncryptionKeys(env);
   assertTelegramToken(role, env);
+  voiceConfig(env);
+  assertAnthropicKey(role, env);
 }
diff --git a/ApiCore-Backend/src/voice/anthropic-config.spec.ts b/ApiCore-Backend/src/voice/anthropic-config.spec.ts
new file mode 100644
index 0000000..9db5663
--- /dev/null
+++ b/ApiCore-Backend/src/voice/anthropic-config.spec.ts
@@ -0,0 +1,91 @@
+import { Logger } from '@nestjs/common';
+import { anthropicApiKey, assertAnthropicKey } from './anthropic-config';
+
+const KEY = 'sk-ant-api03-abcdefghijklmnopqrstuvwxyz0123456789';
+
+function fakeLogger() {
+  return { warn: jest.fn(), error: jest.fn() } satisfies Pick<
+    Logger,
+    'warn' | 'error'
+  >;
+}
+
+describe('anthropicApiKey', () => {
+  it('returns a well-formed key, trimmed', () => {
+    expect(anthropicApiKey({ ANTHROPIC_API_KEY: ` ${KEY} ` })).toBe(KEY);
+  });
+
+  it.each([
+    ['unset', {}],
+    ['empty', { ANTHROPIC_API_KEY: '  ' }],
+    ['a placeholder', { ANTHROPIC_API_KEY: 'change-me-anthropic-key' }],
+    ['the wrong format', { ANTHROPIC_API_KEY: 'sk-ant-short' }],
+    ['dummy', { ANTHROPIC_API_KEY: 'dummy' }],
+  ])('returns null for %s', (_label, env) => {
+    expect(anthropicApiKey(env)).toBeNull();
+  });
+});
+
+describe('assertAnthropicKey', () => {
+  it('assertAnthropicKey never throws and disables on a placeholder', () => {
+    for (const value of ['change-me-anthropic-key', 'dummy', '', 'sk-ant-x']) {
+      const logger = fakeLogger();
+      expect(() =>
+        assertAnthropicKey(
+          'worker',
+          { NODE_ENV: 'production', ANTHROPIC_API_KEY: value },
+          logger,
+        ),
+      ).not.toThrow();
+    }
+    const logger = fakeLogger();
+    assertAnthropicKey(
+      'worker',
+      { NODE_ENV: 'production', ANTHROPIC_API_KEY: 'change-me-x' },
+      logger,
+    );
+    expect(logger.error).toHaveBeenCalledTimes(1);
+    expect(anthropicApiKey({ ANTHROPIC_API_KEY: 'change-me-x' })).toBeNull();
+  });
+
+  it('logs the variable name once, never the value', () => {
+    const logger = fakeLogger();
+    assertAnthropicKey(
+      'worker',
+      { ANTHROPIC_API_KEY: 'sk-ant-short-secret' },
+      logger,
+    );
+    const output = JSON.stringify([
+      logger.warn.mock.calls,
+      logger.error.mock.calls,
+    ]);
+    expect(output).toContain('ANTHROPIC_API_KEY');
+    expect(output).not.toContain('short-secret');
+    expect(logger.error).toHaveBeenCalledTimes(1);
+  });
+
+  it('api and job roles skip the Anthropic check', () => {
+    for (const role of ['api', 'job'] as const) {
+      const logger = fakeLogger();
+      assertAnthropicKey(role, { ANTHROPIC_API_KEY: 'garbage' }, logger);
+      expect(logger.error).not.toHaveBeenCalled();
+      expect(logger.warn).not.toHaveBeenCalled();
+    }
+  });
+
+  it('accepts a good key silently in the worker and in all-in-one mode', () => {
+    for (const role of ['worker', 'all'] as const) {
+      const logger = fakeLogger();
+      assertAnthropicKey(role, { ANTHROPIC_API_KEY: KEY }, logger);
+      expect(logger.error).not.toHaveBeenCalled();
+      expect(logger.warn).not.toHaveBeenCalled();
+    }
+  });
+
+  it('warns that extraction stays off when the worker has no key', () => {
+    const logger = fakeLogger();
+    assertAnthropicKey('worker', {}, logger);
+    expect(logger.warn).toHaveBeenCalledTimes(1);
+    expect(logger.error).not.toHaveBeenCalled();
+  });
+});
diff --git a/ApiCore-Backend/src/voice/anthropic-config.ts b/ApiCore-Backend/src/voice/anthropic-config.ts
new file mode 100644
index 0000000..ec7008e
--- /dev/null
+++ b/ApiCore-Backend/src/voice/anthropic-config.ts
@@ -0,0 +1,59 @@
+import { Logger } from '@nestjs/common';
+import type { ApicoreRole } from '../runtime/role';
+
+/** Key format issued by Anthropic: "sk-ant-" followed by URL-safe characters. */
+export const ANTHROPIC_KEY_PATTERN = /^sk-ant-[A-Za-z0-9_-]{20,}$/;
+
+const PLACEHOLDER_PATTERN = /^change-me/i;
+const WORKER_ROLES: readonly ApicoreRole[] = ['worker', 'all'];
+
+function trimmed(value: string | undefined): string | null {
+  const text = value?.trim();
+  return text ? text : null;
+}
+
+/**
+ * The API key for voice extraction, or null if it is unset, a placeholder or
+ * malformed - extraction then stays off (code EXTRACT_DISABLED). Only the
+ * worker holds the key (Secret apicore-anthropic, optional).
+ */
+export function anthropicApiKey(
+  env: NodeJS.ProcessEnv = process.env,
+): string | null {
+  const key = trimmed(env.ANTHROPIC_API_KEY);
+  return key !== null && ANTHROPIC_KEY_PATTERN.test(key) ? key : null;
+}
+
+/**
+ * Startup check, same rules as the Telegram token: optional, a bad value
+ * never stops a pod. In the worker, a missing key is a warning and a
+ * placeholder or malformed key an error, once, naming the variable and
+ * never its value. API and job pods never hold the key and skip the check.
+ */
+export function assertAnthropicKey(
+  role: ApicoreRole,
+  env: NodeJS.ProcessEnv = process.env,
+  logger: Pick<Logger, 'warn' | 'error'> = new Logger('AnthropicStartup'),
+): void {
+  if (!WORKER_ROLES.includes(role)) {
+    return;
+  }
+  const raw = trimmed(env.ANTHROPIC_API_KEY);
+  if (raw === null) {
+    logger.warn(
+      'ANTHROPIC_API_KEY is not set: voice extraction stays off (EXTRACT_DISABLED).',
+    );
+    return;
+  }
+  if (PLACEHOLDER_PATTERN.test(raw)) {
+    logger.error(
+      'ANTHROPIC_API_KEY is still set to an example placeholder: voice extraction stays off - set the real key or remove it.',
+    );
+    return;
+  }
+  if (!ANTHROPIC_KEY_PATTERN.test(raw)) {
+    logger.error(
+      'ANTHROPIC_API_KEY is malformed (expected "sk-ant-..."): voice extraction stays off.',
+    );
+  }
+}
diff --git a/ApiCore-Backend/src/voice/core/inspection-field-specs.spec.ts b/ApiCore-Backend/src/voice/core/inspection-field-specs.spec.ts
new file mode 100644
index 0000000..bc45376
--- /dev/null
+++ b/ApiCore-Backend/src/voice/core/inspection-field-specs.spec.ts
@@ -0,0 +1,155 @@
+import { getMetadataStorage } from 'class-validator';
+import { ColonyCondition } from '../../../generated/prisma';
+import { CreateInspectionDto } from '../../inspections/dto/create-inspection.dto';
+import {
+  FIELD_SPECS,
+  INSPECTION_VOICE_FIELDS,
+  VOICE_EXCLUDED_INSPECTION_FIELDS,
+  checkFieldValue,
+} from './inspection-field-specs';
+
+interface DtoRule {
+  name: string;
+  constraints: unknown[];
+}
+
+/** The class-validator rules of every property of the DTO. */
+function dtoRules(): Map<string, DtoRule[]> {
+  const rules = new Map<string, DtoRule[]>();
+  for (const meta of getMetadataStorage().getTargetValidationMetadatas(
+    CreateInspectionDto,
+    '',
+    false,
+    false,
+  )) {
+    const list = rules.get(meta.propertyName) ?? [];
+    list.push({
+      name: meta.name ?? meta.type,
+      constraints: meta.constraints ?? [],
+    });
+    rules.set(meta.propertyName, list);
+  }
+  return rules;
+}
+
+describe('FIELD_SPECS', () => {
+  it('FIELD_SPECS covers exactly the DTO fields minus the excluded list', () => {
+    const dtoFields = [...dtoRules().keys()];
+    const covered = dtoFields
+      .filter((field) => !(field in VOICE_EXCLUDED_INSPECTION_FIELDS))
+      .sort();
+
+    expect(covered).toEqual([...INSPECTION_VOICE_FIELDS].sort());
+    expect(Object.keys(FIELD_SPECS).sort()).toEqual(covered);
+    expect(INSPECTION_VOICE_FIELDS).toHaveLength(17);
+  });
+
+  it('gives every excluded field a reason', () => {
+    expect(Object.keys(VOICE_EXCLUDED_INSPECTION_FIELDS).sort()).toEqual(
+      [
+        'applyToColony',
+        'broodAmount',
+        'colonyId',
+        'date',
+        'hiveChange',
+        'temperature',
+        'voiceCaptureId',
+        'weather',
+      ].sort(),
+    );
+    for (const reason of Object.values(VOICE_EXCLUDED_INSPECTION_FIELDS)) {
+      expect(reason.length).toBeGreaterThan(10);
+    }
+  });
+
+  it('FIELD_SPECS bounds lie within CreateInspectionDto', () => {
+    const rules = dtoRules();
+    for (const field of INSPECTION_VOICE_FIELDS) {
+      const spec = FIELD_SPECS[field];
+      const fieldRules = rules.get(field) ?? [];
+      if (spec.kind === 'int') {
+        const min = fieldRules.find((rule) => rule.name === 'min');
+        const max = fieldRules.find((rule) => rule.name === 'max');
+        if (min) {
+          expect(spec.min).toBeGreaterThanOrEqual(min.constraints[0] as number);
+        }
+        if (max) {
+          expect(spec.max).toBeLessThanOrEqual(max.constraints[0] as number);
+        }
+        expect(fieldRules.map((rule) => rule.name)).toContain('isInt');
+      }
+      if (spec.kind === 'bool') {
+        expect(fieldRules.map((rule) => rule.name)).toContain('isBoolean');
+      }
+      if (spec.kind === 'text') {
+        expect(fieldRules.map((rule) => rule.name)).toContain('isString');
+      }
+    }
+    // The DTO has no upper bound for broodFrames; the voice path adds one.
+    expect(FIELD_SPECS.broodFrames).toEqual({ kind: 'int', min: 0, max: 40 });
+    expect(FIELD_SPECS.colonyStrength).toEqual({
+      kind: 'int',
+      min: 0,
+      max: 40,
+    });
+  });
+
+  it('feedStatus accepts every ColonyCondition and nothing else', () => {
+    for (const value of Object.values(ColonyCondition)) {
+      expect(checkFieldValue('feedStatus', value)).toMatchObject({
+        ok: true,
+        value,
+      });
+    }
+    for (const value of ['ausreichend', 'good', 'OK', '', 3, null]) {
+      expect(checkFieldValue('feedStatus', value)).toEqual({ ok: false });
+    }
+  });
+});
+
+describe('checkFieldValue', () => {
+  it('accepts integers within the bounds and rejects the rest', () => {
+    expect(checkFieldValue('colonyStrength', 40)).toMatchObject({
+      ok: true,
+      value: 40,
+    });
+    expect(checkFieldValue('colonyStrength', 0)).toMatchObject({ ok: true });
+    for (const value of [41, -1, 7.5, '7', true, null, Number.NaN]) {
+      expect(checkFieldValue('colonyStrength', value)).toEqual({ ok: false });
+    }
+    expect(checkFieldValue('broodPattern', 1)).toMatchObject({ ok: true });
+    expect(checkFieldValue('broodPattern', 5)).toMatchObject({ ok: true });
+    expect(checkFieldValue('broodPattern', 0)).toEqual({ ok: false });
+    expect(checkFieldValue('broodPattern', 6)).toEqual({ ok: false });
+  });
+
+  it('accepts booleans only as booleans', () => {
+    expect(checkFieldValue('queenSeen', false)).toMatchObject({
+      ok: true,
+      value: false,
+    });
+    expect(checkFieldValue('queenSeen', 'true')).toEqual({ ok: false });
+    expect(checkFieldValue('queenSeen', 1)).toEqual({ ok: false });
+  });
+
+  it('sanitizes text and reports shortening', () => {
+    expect(checkFieldValue('notes', 'Ruhig <b>und</b> sanft')).toMatchObject({
+      ok: true,
+      value: 'Ruhig bund/b sanft',
+      truncated: false,
+    });
+    const long = checkFieldValue('healthIssues', 'x'.repeat(700));
+    expect(long).toMatchObject({ ok: true, truncated: true });
+    expect(long.ok && String(long.value)).toHaveLength(500);
+    expect(checkFieldValue('measures', '  <> ')).toEqual({ ok: false });
+    expect(checkFieldValue('measures', 5)).toEqual({ ok: false });
+  });
+
+  it('rejects weather and temperature and unknown fields', () => {
+    expect(checkFieldValue('weather', 'sonnig')).toEqual({ ok: false });
+    expect(checkFieldValue('temperature', 21)).toEqual({ ok: false });
+    expect(checkFieldValue('colonyId', 'abc')).toEqual({ ok: false });
+    expect(checkFieldValue('constructor', 'x')).toEqual({ ok: false });
+    expect(checkFieldValue('__proto__', 'x')).toEqual({ ok: false });
+  });
+});
diff --git a/ApiCore-Backend/src/voice/core/inspection-field-specs.ts b/ApiCore-Backend/src/voice/core/inspection-field-specs.ts
new file mode 100644
index 0000000..e3bfc5b
--- /dev/null
+++ b/ApiCore-Backend/src/voice/core/inspection-field-specs.ts
@@ -0,0 +1,130 @@
+import { ColonyCondition } from '../../../generated/prisma';
+import { sanitizeFreeText } from './voice-text';
+
+/**
+ * The inspection fields a voice note may suggest. The limits follow the
+ * existing form and CreateInspectionDto (ruling 2): strength up to 40, five
+ * feed levels. broodFrames has no upper bound in the DTO; the voice path
+ * adds 40 so a misheard number cannot reach the form.
+ */
+export const INSPECTION_VOICE_FIELDS = [
+  'colonyStrength',
+  'broodFrames',
+  'broodPattern',
+  'openBroodPresent',
+  'cappedBroodPresent',
+  'eggsPresent',
+  'queenSeen',
+  'queenCellsPresent',
+  'swarmMood',
+  'gentleness',
+  'combBehavior',
+  'feedStatus',
+  'honeySuperStatus',
+  'healthIssues',
+  'varroaIssues',
+  'measures',
+  'notes',
+] as const;
+
+export type InspectionVoiceField = (typeof INSPECTION_VOICE_FIELDS)[number];
+
+export type FieldSpec =
+  | { kind: 'int'; min: number; max: number }
+  | { kind: 'bool' }
+  | { kind: 'enum'; values: readonly string[] }
+  | { kind: 'text'; max: 500 };
+
+const TEXT_MAX = 500;
+const FRAME_MAX = 40;
+const SCALE: FieldSpec = { kind: 'int', min: 1, max: 5 };
+const BOOL: FieldSpec = { kind: 'bool' };
+const TEXT: FieldSpec = { kind: 'text', max: TEXT_MAX };
+
+export const FIELD_SPECS: Readonly<Record<InspectionVoiceField, FieldSpec>> = {
+  colonyStrength: { kind: 'int', min: 0, max: FRAME_MAX },
+  broodFrames: { kind: 'int', min: 0, max: FRAME_MAX },
+  broodPattern: SCALE,
+  openBroodPresent: BOOL,
+  cappedBroodPresent: BOOL,
+  eggsPresent: BOOL,
+  queenSeen: BOOL,
+  queenCellsPresent: BOOL,
+  swarmMood: SCALE,
+  gentleness: SCALE,
+  combBehavior: SCALE,
+  feedStatus: { kind: 'enum', values: Object.values(ColonyCondition) },
+  honeySuperStatus: TEXT,
+  healthIssues: TEXT,
+  varroaIssues: TEXT,
+  measures: TEXT,
+  notes: TEXT,
+};
+
+/** DTO properties a voice note never fills, each with the reason. */
+export const VOICE_EXCLUDED_INSPECTION_FIELDS: Readonly<
+  Record<string, string>
+> = {
+  colonyId: 'The colony comes from the voice note itself, never from speech.',
+  date: 'The date comes from the voice note (inspectionDate), not from speech.',
+  weather: 'Weather is fetched from the weather service, not spoken.',
+  temperature: 'Temperature is fetched from the weather service, not spoken.',
+  broodAmount: 'Legacy free text; broodFrames and broodPattern replace it.',
+  applyToColony: 'Taking values over to the colony card is a separate click.',
+  hiveChange: 'Hive operations are never created from speech.',
+  voiceCaptureId: 'Links the voice note; it is not an observation.',
+};
+
+export type CheckedFieldValue =
+  | {
+      ok: true;
+      field: InspectionVoiceField;
+      value: number | boolean | string;
+      truncated: boolean;
+    }
+  | { ok: false };
+
+const REJECTED: CheckedFieldValue = { ok: false };
+
+function accepted(
+  field: InspectionVoiceField,
+  value: number | boolean | string,
+  truncated = false,
+): CheckedFieldValue {
+  return { ok: true, field, value, truncated };
+}
+
+function isVoiceField(field: string): field is InspectionVoiceField {
+  return Object.hasOwn(FIELD_SPECS, field);
+}
+
+/** Checks one suggested value against its limits; text is cleaned and shortened. */
+export function checkFieldValue(
+  field: string,
+  value: unknown,
+): CheckedFieldValue {
+  if (!isVoiceField(field)) {
+    return REJECTED;
+  }
+  const spec = FIELD_SPECS[field];
+  switch (spec.kind) {
+    case 'int':
+      return typeof value === 'number' &&
+        Number.isInteger(value) &&
+        value >= spec.min &&
+        value <= spec.max
+        ? accepted(field, value)
+        : REJECTED;
+    case 'bool':
+      return typeof value === 'boolean' ? accepted(field, value) : REJECTED;
+    case 'enum':
+      return typeof value === 'string' && spec.values.includes(value)
+        ? accepted(field, value)
+        : REJECTED;
+    case 'text': {
+      const text =
+        typeof value === 'string' ? sanitizeFreeText(value, spec.max) : null;
+      return text ? accepted(field, text.text, text.truncated) : REJECTED;
+    }
+  }
+}
diff --git a/ApiCore-Backend/src/voice/core/inspection-scales.ts b/ApiCore-Backend/src/voice/core/inspection-scales.ts
new file mode 100644
index 0000000..73cb7a8
--- /dev/null
+++ b/ApiCore-Backend/src/voice/core/inspection-scales.ts
@@ -0,0 +1,44 @@
+/**
+ * The four 1-5 scales of the inspection form: what the STORED ends mean
+ * (the form shows swarm mood mirrored, but stores 1 = ruhig) and the words
+ * a beekeeper says for them. The same data is in
+ * test/fixtures/voice/inspection-scales.json for the frontend guard; a test
+ * keeps both equal (the TS module cannot import the JSON: it lies outside
+ * src, and the build's root directory must stay src).
+ */
+export interface ScaleSpec {
+  field: 'broodPattern' | 'swarmMood' | 'gentleness' | 'combBehavior';
+  /** Meaning of the stored value 1. */
+  storedOne: string;
+  /** Meaning of the stored value 5. */
+  storedFive: string;
+  /** Spoken word -> stored value. */
+  anchors: Record<string, 1 | 2 | 3 | 4 | 5>;
+}
+
+export const INSPECTION_SCALES: readonly ScaleSpec[] = [
+  {
+    field: 'broodPattern',
+    storedOne: 'lückenhaft',
+    storedFive: 'geschlossen',
+    anchors: { lückenhaft: 1, mittel: 3, geschlossen: 5 },
+  },
+  {
+    field: 'swarmMood',
+    storedOne: 'ruhig',
+    storedFive: 'stark',
+    anchors: { ruhig: 1, mittel: 3, stark: 5 },
+  },
+  {
+    field: 'gentleness',
+    storedOne: 'stechlustig',
+    storedFive: 'sehr sanft',
+    anchors: { stechlustig: 1, normal: 3, 'sehr sanft': 5 },
+  },
+  {
+    field: 'combBehavior',
+    storedOne: 'läuft weg',
+    storedFive: 'sitzt ruhig',
+    anchors: { 'läuft weg': 1, mittel: 3, 'sitzt ruhig': 5 },
+  },
+];
diff --git a/ApiCore-Backend/src/voice/core/transcript.spec.ts b/ApiCore-Backend/src/voice/core/transcript.spec.ts
new file mode 100644
index 0000000..96e6132
--- /dev/null
+++ b/ApiCore-Backend/src/voice/core/transcript.spec.ts
@@ -0,0 +1,122 @@
+import { Logger } from '@nestjs/common';
+import { sealVoiceText, voiceAad } from './voice-crypto';
+import {
+  MAX_TRANSCRIPT_CHARS,
+  type TranscriptPayload,
+  openTranscript,
+  sealTranscript,
+} from './transcript';
+
+describe('transcript', () => {
+  const originalEnv = { ...process.env };
+
+  beforeEach(() => {
+    process.env.JWT_ACCESS_SECRET = 'j'.repeat(40);
+    process.env.VOICE_ENCRYPTION_KEY = 'a'.repeat(40);
+    jest.spyOn(Logger.prototype, 'warn').mockImplementation(() => undefined);
+  });
+
+  afterEach(() => {
+    process.env = { ...originalEnv };
+    jest.restoreAllMocks();
+  });
+
+  it('transcript payload round-trips with segments', () => {
+    const payload: TranscriptPayload = {
+      v: 1,
+      text: 'Königin gesehen. Acht Waben.',
+      durationSec: 12,
+      segments: [
+        { start: 0, end: 3.2, text: 'Königin gesehen.' },
+        { start: 3.2, end: 6, text: 'Acht Waben.' },
+      ],
+    };
+
+    const sealed = sealTranscript('c1', payload);
+
+    expect(sealed).toMatch(/^k[0-9a-f]{8}:/);
+    expect(sealed).not.toContain('Königin');
+    expect(openTranscript('c1', sealed)).toEqual(payload);
+  });
+
+  it('round-trips a text-only payload', () => {
+    const payload: TranscriptPayload = { v: 1, text: 'Nur Text' };
+    expect(openTranscript('c1', sealTranscript('c1', payload))).toEqual(
+      payload,
+    );
+  });
+
+  it('is bound to its capture', () => {
+    const sealed = sealTranscript('c1', { v: 1, text: 'x' });
+    expect(() => openTranscript('c2', sealed)).toThrow(
+      'ciphertext failed authentication',
+    );
+  });
+
+  it('rejects a payload with another version', () => {
+    const sealed = sealVoiceText(
+      JSON.stringify({ v: 2, text: 'geheim' }),
+      voiceAad('c1', 'transcript'),
+    );
+    expect(() => openTranscript('c1', sealed)).toThrow(
+      'unsupported transcript payload',
+    );
+  });
+
+  it.each([
+    ['not json at all geheim', 'unsupported transcript payload'],
+    [JSON.stringify({ v: 1, text: 5 }), 'unsupported transcript payload'],
+    [
+      JSON.stringify({ v: 1, text: 'a', segments: [{ start: 'x' }] }),
+      'unsupported transcript payload',
+    ],
+    [JSON.stringify(null), 'unsupported transcript payload'],
+  ])('rejects a malformed payload without echoing it', (body, message) => {
+    const sealed = sealVoiceText(body, voiceAad('c1', 'transcript'));
+    let thrown = '';
+    try {
+      openTranscript('c1', sealed);
+    } catch (error) {
+      thrown = (error as Error).message;
+    }
+    expect(thrown).toBe(message);
+    expect(thrown).not.toContain('geheim');
+  });
+
+  it('rejects non-finite numbers and oversized text', () => {
+    const open = (body: string): unknown =>
+      openTranscript('c1', sealVoiceText(body, voiceAad('c1', 'transcript')));
+    const bad = 'unsupported transcript payload';
+    expect(() => open('{"v":1,"text":"a","durationSec":1e999}')).toThrow(bad);
+    expect(() =>
+      open(
+        '{"v":1,"text":"a","segments":[{"start":1e999,"end":2,"text":"b"}]}',
+      ),
+    ).toThrow(bad);
+    expect(() =>
+      open(
+        JSON.stringify({ v: 1, text: 'x'.repeat(MAX_TRANSCRIPT_CHARS + 1) }),
+      ),
+    ).toThrow(bad);
+    expect(
+      open(JSON.stringify({ v: 1, text: 'x'.repeat(MAX_TRANSCRIPT_CHARS) })),
+    ).toBeTruthy();
+  });
+
+  it('returns only the known keys', () => {
+    const sealed = sealVoiceText(
+      JSON.stringify({
+        v: 1,
+        text: 'a',
+        extra: 'x',
+        segments: [{ start: 0, end: 1, text: 'b', more: 1 }],
+      }),
+      voiceAad('c1', 'transcript'),
+    );
+    expect(openTranscript('c1', sealed)).toEqual({
+      v: 1,
+      text: 'a',
+      segments: [{ start: 0, end: 1, text: 'b' }],
+    });
+  });
+});
diff --git a/ApiCore-Backend/src/voice/core/transcript.ts b/ApiCore-Backend/src/voice/core/transcript.ts
new file mode 100644
index 0000000..635e3dd
--- /dev/null
+++ b/ApiCore-Backend/src/voice/core/transcript.ts
@@ -0,0 +1,100 @@
+import { openVoiceText, sealVoiceText, voiceAad } from './voice-crypto';
+
+export interface TranscriptSegment {
+  start: number;
+  end: number;
+  text: string;
+}
+
+/** What `transcriptEnc` holds once opened. Segments let part 4 join chunks. */
+export interface TranscriptPayload {
+  v: 1;
+  text: string;
+  durationSec?: number;
+  segments?: TranscriptSegment[];
+}
+
+/**
+ * Upper bound for the text of one transcript. Whisper gets at most 240 s of
+ * speech (a few thousand characters); this leaves room and stops a forged
+ * or damaged payload from growing without limit.
+ */
+export const MAX_TRANSCRIPT_CHARS = 50000;
+const MAX_SEGMENTS = 5000;
+
+const UNSUPPORTED = 'unsupported transcript payload';
+
+function isText(value: unknown): value is string {
+  return typeof value === 'string' && value.length <= MAX_TRANSCRIPT_CHARS;
+}
+
+/** Only the known keys survive. */
+function toSegment(value: unknown): TranscriptSegment | null {
+  if (typeof value !== 'object' || value === null) {
+    return null;
+  }
+  const { start, end, text } = value as Record<string, unknown>;
+  return Number.isFinite(start) && Number.isFinite(end) && isText(text)
+    ? { start: start as number, end: end as number, text }
+    : null;
+}
+
+function toPayload(value: unknown): TranscriptPayload | null {
+  if (typeof value !== 'object' || value === null) {
+    return null;
+  }
+  const { v, text, durationSec, segments } = value as Record<string, unknown>;
+  if (v !== 1 || !isText(text)) {
+    return null;
+  }
+  const payload: TranscriptPayload = { v: 1, text };
+  if (durationSec !== undefined) {
+    if (!Number.isFinite(durationSec)) {
+      return null;
+    }
+    payload.durationSec = durationSec as number;
+  }
+  if (segments !== undefined) {
+    if (!Array.isArray(segments) || segments.length > MAX_SEGMENTS) {
+      return null;
+    }
+    const checked = segments.map(toSegment);
+    if (checked.some((each) => each === null)) {
+      return null;
+    }
+    payload.segments = checked as TranscriptSegment[];
+  }
+  return payload;
+}
+
+export function sealTranscript(
+  captureId: string,
+  payload: TranscriptPayload,
+): string {
+  return sealVoiceText(
+    JSON.stringify(payload),
+    voiceAad(captureId, 'transcript'),
+  );
+}
+
+/**
+ * Opens and checks a transcript. A broken payload throws a fixed message:
+ * JSON.parse errors quote the input, so they are never passed on.
+ */
+export function openTranscript(
+  captureId: string,
+  stored: string,
+): TranscriptPayload {
+  const json = openVoiceText(stored, voiceAad(captureId, 'transcript'));
+  let parsed: unknown;
+  try {
+    parsed = JSON.parse(json);
+  } catch {
+    throw new Error(UNSUPPORTED);
+  }
+  const payload = toPayload(parsed);
+  if (payload === null) {
+    throw new Error(UNSUPPORTED);
+  }
+  return payload;
+}
diff --git a/ApiCore-Backend/src/voice/core/voice-crypto.spec.ts b/ApiCore-Backend/src/voice/core/voice-crypto.spec.ts
new file mode 100644
index 0000000..32f18e9
--- /dev/null
+++ b/ApiCore-Backend/src/voice/core/voice-crypto.spec.ts
@@ -0,0 +1,155 @@
+import { Logger } from '@nestjs/common';
+import { createHash, hkdfSync } from 'node:crypto';
+import { loadKeyRing } from '../../common/crypto/key-ring';
+import {
+  isVoiceSealedWithCurrentKey,
+  openVoiceBytes,
+  openVoiceText,
+  sealVoiceBytes,
+  sealVoiceText,
+  voiceAad,
+} from './voice-crypto';
+
+const JWT_SECRET = 'j'.repeat(40);
+const KEY_A = 'a'.repeat(40);
+const KEY_B = 'b'.repeat(40);
+const AAD = 'capture:c1:transcript';
+
+describe('voice-crypto', () => {
+  const originalEnv = { ...process.env };
+
+  beforeEach(() => {
+    process.env.JWT_ACCESS_SECRET = JWT_SECRET;
+    process.env.VOICE_ENCRYPTION_KEY = KEY_A;
+    delete process.env.VOICE_ENCRYPTION_KEY_PREVIOUS;
+    jest.spyOn(Logger.prototype, 'warn').mockImplementation(() => undefined);
+  });
+
+  afterEach(() => {
+    process.env = { ...originalEnv };
+    jest.restoreAllMocks();
+  });
+
+  it('audio and transcript round-trip through the key ring', () => {
+    const text = 'Königin gesehen, 8 Waben besetzt.';
+    const audio = Buffer.from([0x1a, 0x45, 0xdf, 0xa3, 1, 2, 3, 255, 0]);
+
+    const sealedText = sealVoiceText(text, AAD);
+    const sealedAudio = sealVoiceBytes(audio, 'capture:c1:audio');
+
+    expect(sealedText).toMatch(/^k[0-9a-f]{8}:/);
+    expect(sealedText).not.toContain('Königin');
+    expect(openVoiceText(sealedText, AAD)).toBe(text);
+    expect(openVoiceBytes(sealedAudio, 'capture:c1:audio').equals(audio)).toBe(
+      true,
+    );
+    expect(sealedAudio.length).toBe(1 + 8 + 12 + 16 + audio.length);
+    expect(sealedAudio[0]).toBe(1);
+  });
+
+  it('seals the same text differently every time', () => {
+    expect(sealVoiceText('x', AAD)).not.toBe(sealVoiceText('x', AAD));
+  });
+
+  it('fail with the wrong key', () => {
+    const sealedText = sealVoiceText('geheim', AAD);
+    const sealedAudio = sealVoiceBytes(Buffer.from('geheim'), AAD);
+    process.env.VOICE_ENCRYPTION_KEY = KEY_B;
+
+    expect(() => openVoiceText(sealedText, AAD)).toThrow('unknown key id');
+    expect(() => openVoiceBytes(sealedAudio, AAD)).toThrow('unknown key id');
+  });
+
+  it('opens values sealed with the previous key', () => {
+    const sealedText = sealVoiceText('geheim', AAD);
+    const sealedAudio = sealVoiceBytes(Buffer.from('geheim'), AAD);
+    process.env.VOICE_ENCRYPTION_KEY = KEY_B;
+    process.env.VOICE_ENCRYPTION_KEY_PREVIOUS = KEY_A;
+
+    expect(openVoiceText(sealedText, AAD)).toBe('geheim');
+    expect(openVoiceBytes(sealedAudio, AAD).toString()).toBe('geheim');
+    expect(isVoiceSealedWithCurrentKey(sealedText)).toBe(false);
+    expect(isVoiceSealedWithCurrentKey(sealedAudio)).toBe(false);
+    expect(isVoiceSealedWithCurrentKey(sealVoiceText('neu', AAD))).toBe(true);
+    expect(
+      isVoiceSealedWithCurrentKey(sealVoiceBytes(Buffer.from('neu'), AAD)),
+    ).toBe(true);
+  });
+
+  it('fail when the aad names another capture', () => {
+    const sealedText = sealVoiceText('geheim', voiceAad('c1', 'transcript'));
+    const sealedAudio = sealVoiceBytes(
+      Buffer.from('geheim'),
+      voiceAad('c1', 'audio'),
+    );
+
+    expect(() =>
+      openVoiceText(sealedText, voiceAad('c2', 'transcript')),
+    ).toThrow('ciphertext failed authentication');
+    expect(() =>
+      openVoiceText(sealedText, voiceAad('c1', 'suggestion')),
+    ).toThrow('ciphertext failed authentication');
+    expect(() => openVoiceBytes(sealedAudio, voiceAad('c2', 'audio'))).toThrow(
+      'ciphertext failed authentication',
+    );
+  });
+
+  it('fail on changed bytes, a short value and an unknown format', () => {
+    const sealedAudio = sealVoiceBytes(Buffer.from('geheim'), AAD);
+    const changed = Buffer.from(sealedAudio);
+    changed[changed.length - 1] ^= 0xff;
+
+    expect(() => openVoiceBytes(changed, AAD)).toThrow(
+      'ciphertext failed authentication',
+    );
+    expect(() => openVoiceBytes(sealedAudio.subarray(0, 20), AAD)).toThrow(
+      'malformed ciphertext',
+    );
+    const otherVersion = Buffer.from(sealedAudio);
+    otherVersion[0] = 2;
+    expect(() => openVoiceBytes(otherVersion, AAD)).toThrow(
+      'unsupported ciphertext version',
+    );
+    expect(() => openVoiceText('plain text', AAD)).toThrow('missing key id');
+    expect(() => openVoiceText('k00000000:a.b', AAD)).toThrow('unknown key id');
+  });
+
+  it('use the voice purpose key, not the JWT secret', () => {
+    const key = Buffer.from(
+      hkdfSync('sha256', KEY_A, 'apicore-key-ring', 'apicore-voice-v1', 32),
+    );
+    const keyId = `k${createHash('sha256').update(key).digest('hex').slice(0, 8)}`;
+
+    expect(loadKeyRing('voice').current.id).toBe(keyId);
+    expect(sealVoiceText('x', AAD).startsWith(`${keyId}:`)).toBe(true);
+    expect(
+      sealVoiceBytes(Buffer.from('x'), AAD).subarray(1, 9).toString(),
+    ).toBe(keyId.slice(1));
+    // Rotating the JWT secret changes nothing for stored voice content.
+    const sealed = sealVoiceText('geheim', AAD);
+    process.env.JWT_ACCESS_SECRET = 'z'.repeat(40);
+    expect(openVoiceText(sealed, AAD)).toBe('geheim');
+  });
+
+  it('names the aad per capture and kind', () => {
+    expect(voiceAad('abc', 'transcript')).toBe('capture:abc:transcript');
+    expect(voiceAad('abc', 'suggestion')).toBe('capture:abc:suggestion');
+    expect(voiceAad('abc', 'audio')).toBe('capture:abc:audio');
+  });
+
+  it('rejects a key id that is not eight hex characters', () => {
+    const sealed = sealVoiceBytes(Buffer.from('geheim'), AAD);
+    const bad = [
+      Buffer.from('ZZZZZZZZ'),
+      Buffer.from([0xe1, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68]),
+    ];
+    for (const id of bad) {
+      const changed = Buffer.from(sealed);
+      id.copy(changed, 1);
+      expect(() => openVoiceBytes(changed, AAD)).toThrow(
+        'malformed ciphertext',
+      );
+      expect(isVoiceSealedWithCurrentKey(changed)).toBe(false);
+    }
+  });
+});
diff --git a/ApiCore-Backend/src/voice/core/voice-crypto.ts b/ApiCore-Backend/src/voice/core/voice-crypto.ts
new file mode 100644
index 0000000..2a6b2a3
--- /dev/null
+++ b/ApiCore-Backend/src/voice/core/voice-crypto.ts
@@ -0,0 +1,128 @@
+import {
+  KEY_ID_PATTERN,
+  findRingKey,
+  gcmOpen,
+  gcmSeal,
+  loadKeyRing,
+} from '../../common/crypto/key-ring';
+
+/**
+ * Voice content (audio, transcript, suggestions) is sealed with the key ring
+ * of the purpose `voice` (VOICE_ENCRYPTION_KEY). Every value is bound to its
+ * row through the GCM associated data, so a ciphertext moved to another
+ * capture, or to another kind of content, no longer opens.
+ *
+ * Text: `k<8 hex>:<iv>.<tag>.<data>` (base64 parts), like the other purposes.
+ * Bytes: `[1 byte version][8 byte key id (ASCII hex)][12 iv][16 tag][data]`.
+ * Errors carry no input.
+ */
+export type VoiceContentKind = 'transcript' | 'suggestion' | 'audio';
+
+const BYTES_VERSION = 1;
+const KEY_ID_BYTES = 8;
+const IV_BYTES = 12;
+const TAG_BYTES = 16;
+const KEY_ID_HEX = /^[0-9a-f]{8}$/;
+const BYTES_HEADER = 1 + KEY_ID_BYTES + IV_BYTES + TAG_BYTES;
+
+/** The associated data of one kind of content of one capture. */
+export function voiceAad(captureId: string, kind: VoiceContentKind): string {
+  return `capture:${captureId}:${kind}`;
+}
+
+function aadBuffer(aad: string): Buffer {
+  return Buffer.from(aad, 'utf8');
+}
+
+export function sealVoiceText(plaintext: string, aad: string): string {
+  const { current } = loadKeyRing('voice');
+  const sealed = gcmSeal(
+    current.key,
+    Buffer.from(plaintext, 'utf8'),
+    aadBuffer(aad),
+  );
+  const body = [sealed.iv, sealed.tag, sealed.ciphertext]
+    .map((part) => part.toString('base64'))
+    .join('.');
+  return `${current.id}:${body}`;
+}
+
+export function openVoiceText(stored: string, aad: string): string {
+  if (!KEY_ID_PATTERN.test(stored)) {
+    throw new Error('missing key id');
+  }
+  const separator = stored.indexOf(':');
+  const ringKey = findRingKey(loadKeyRing('voice'), stored.slice(0, separator));
+  if (!ringKey) {
+    throw new Error('unknown key id');
+  }
+  const parts = stored.slice(separator + 1).split('.');
+  if (parts.length !== 3) {
+    throw new Error('malformed ciphertext');
+  }
+  const [iv, tag, ciphertext] = parts.map((part) =>
+    Buffer.from(part, 'base64'),
+  );
+  return gcmOpen(ringKey.key, { iv, tag, ciphertext }, aadBuffer(aad)).toString(
+    'utf8',
+  );
+}
+
+export function sealVoiceBytes(plaintext: Buffer, aad: string): Buffer {
+  const { current } = loadKeyRing('voice');
+  const sealed = gcmSeal(current.key, plaintext, aadBuffer(aad));
+  return Buffer.concat([
+    Buffer.from([BYTES_VERSION]),
+    Buffer.from(current.id.slice(1), 'ascii'),
+    sealed.iv,
+    sealed.tag,
+    sealed.ciphertext,
+  ]);
+}
+
+/** The 8 hex characters after the version byte, or null for anything else. */
+function storedKeyId(stored: Buffer): string | null {
+  const id = stored.subarray(1, 1 + KEY_ID_BYTES).toString('latin1');
+  return KEY_ID_HEX.test(id) ? id : null;
+}
+
+export function openVoiceBytes(stored: Buffer, aad: string): Buffer {
+  if (stored.length < BYTES_HEADER) {
+    throw new Error('malformed ciphertext');
+  }
+  if (stored[0] !== BYTES_VERSION) {
+    throw new Error('unsupported ciphertext version');
+  }
+  const keyId = storedKeyId(stored);
+  if (keyId === null) {
+    throw new Error('malformed ciphertext');
+  }
+  const ringKey = findRingKey(loadKeyRing('voice'), `k${keyId}`);
+  if (!ringKey) {
+    throw new Error('unknown key id');
+  }
+  const ivStart = 1 + KEY_ID_BYTES;
+  const tagStart = ivStart + IV_BYTES;
+  return gcmOpen(
+    ringKey.key,
+    {
+      iv: stored.subarray(ivStart, tagStart),
+      tag: stored.subarray(tagStart, BYTES_HEADER),
+      ciphertext: stored.subarray(BYTES_HEADER),
+    },
+    aadBuffer(aad),
+  );
+}
+
+/** False for anything the rekey job should reseal (previous key, other formats). */
+export function isVoiceSealedWithCurrentKey(stored: string | Buffer): boolean {
+  const { current } = loadKeyRing('voice');
+  if (typeof stored === 'string') {
+    return stored.startsWith(`${current.id}:`);
+  }
+  return (
+    stored.length >= BYTES_HEADER &&
+    stored[0] === BYTES_VERSION &&
+    storedKeyId(stored) === current.id.slice(1)
+  );
+}
diff --git a/ApiCore-Backend/src/voice/core/voice-errors.ts b/ApiCore-Backend/src/voice/core/voice-errors.ts
new file mode 100644
index 0000000..40c4f0d
--- /dev/null
+++ b/ApiCore-Backend/src/voice/core/voice-errors.ts
@@ -0,0 +1,4 @@
+// One source of truth: the list lives in ../voice-error-codes.ts (created with
+// the claims); the core exports it under the name the plan gives it.
+export { VOICE_ERROR_CODES } from '../voice-error-codes';
+export type { VoiceErrorCode } from '../voice-error-codes';
diff --git a/ApiCore-Backend/src/voice/core/voice-text.spec.ts b/ApiCore-Backend/src/voice/core/voice-text.spec.ts
new file mode 100644
index 0000000..c3b31f7
--- /dev/null
+++ b/ApiCore-Backend/src/voice/core/voice-text.spec.ts
@@ -0,0 +1,116 @@
+import {
+  MAX_QUOTE_LENGTH,
+  normalizeForQuote,
+  normalizeInputText,
+  quoteInText,
+  sanitizeFreeText,
+} from './voice-text';
+
+describe('normalizeInputText', () => {
+  it('applies NFKC, keeps newlines, drops other control characters and trims', () => {
+    expect(normalizeInputText('  ① Wabe\u0000\u0007\r\nZweite Zeile\t ')).toBe(
+      '1 Wabe\nZweite Zeile',
+    );
+  });
+});
+
+describe('normalizeForQuote', () => {
+  it('lowercases, turns non-letters into spaces and collapses them', () => {
+    expect(normalizeForQuote('  Königin, GESEHEN!!  8 Waben… ')).toBe(
+      'königin gesehen 8 waben',
+    );
+  });
+
+  it('folds compatibility characters', () => {
+    expect(normalizeForQuote('ＡＢＣ １２')).toBe('abc 12');
+  });
+});
+
+describe('quoteInText', () => {
+  const transcript = 'Also, die Königin habe ich gesehen. Acht Waben besetzt!';
+
+  it('matches the quote across punctuation and case', () => {
+    expect(quoteInText('KÖNIGIN habe ich gesehen', transcript)).toBe(true);
+    expect(quoteInText('acht waben besetzt', transcript)).toBe(true);
+  });
+
+  it('does not match a quote with a changed number', () => {
+    expect(quoteInText('neun Waben besetzt', transcript)).toBe(false);
+    // "12" must not match inside "112".
+    expect(quoteInText('12 Waben', '112 Waben besetzt')).toBe(false);
+    expect(quoteInText('12 Waben', 'Es sind 12 Waben besetzt')).toBe(true);
+  });
+
+  it('rejects empty, punctuation-only and overlong quotes', () => {
+    expect(quoteInText('', transcript)).toBe(false);
+    expect(quoteInText('...', transcript)).toBe(false);
+    const long = 'a '.repeat(MAX_QUOTE_LENGTH);
+    expect(quoteInText(long, long)).toBe(false);
+  });
+});
+
+describe('sanitizeFreeText', () => {
+  it('sanitizeFreeText strips control characters and angle brackets and shortens to 500', () => {
+    expect(sanitizeFreeText('a\u0000b<script>c</script>', 500)).toEqual({
+      text: 'abscriptc/script',
+      truncated: false,
+    });
+    const result = sanitizeFreeText('x'.repeat(600), 500);
+    expect(result?.text).toHaveLength(500);
+    expect(result?.truncated).toBe(true);
+  });
+
+  it('turns line breaks into single spaces', () => {
+    expect(sanitizeFreeText('Zeile eins\n\nZeile\tzwei', 500)?.text).toBe(
+      'Zeile eins Zeile zwei',
+    );
+  });
+
+  it('returns null when nothing is left', () => {
+    expect(sanitizeFreeText('  \u0000<> \n', 500)).toBeNull();
+    expect(sanitizeFreeText('', 500)).toBeNull();
+  });
+
+  it('does not cut a character in half', () => {
+    const result = sanitizeFreeText('\u{1F41D}'.repeat(10), 4);
+    expect(result?.text).toBe('\u{1F41D}'.repeat(4));
+    expect(result?.truncated).toBe(true);
+  });
+});
+
+describe('decimal numbers in quotes', () => {
+  it('keeps a decimal number as one token', () => {
+    expect(quoteInText('5 Waben', 'ungefaehr 3,5 Waben besetzt')).toBe(false);
+    expect(quoteInText('3,5 Waben', 'ungefaehr 3,5 Waben besetzt')).toBe(true);
+    expect(quoteInText('3.5 Waben', 'ungefaehr 3,5 Waben besetzt')).toBe(true);
+    expect(quoteInText('3,5 Waben', 'ungefaehr 3.5 Waben besetzt')).toBe(true);
+    expect(normalizeForQuote('Es sind 8. Waben, 5')).toBe('es sind 8 waben 5');
+  });
+});
+
+describe('hidden characters and limits', () => {
+  it('maps tabs and lone carriage returns to spaces in normalizeInputText', () => {
+    expect(normalizeInputText('a\tb\rc\r\nd')).toBe('a b c\nd');
+  });
+
+  it('strips format characters and line separators', () => {
+    const hidden = 'a\u200Bb\u202Ec\u2028d\u2029e\uFEFFf';
+    expect(normalizeInputText(hidden)).toBe('abc d ef');
+    expect(sanitizeFreeText(hidden, 500)?.text).toBe('abc d ef');
+  });
+
+  it('counts the quote length in code points', () => {
+    const word = 'a'.repeat(MAX_QUOTE_LENGTH);
+    expect(quoteInText(word, word)).toBe(true);
+    expect(quoteInText(word + 'a', word + 'a')).toBe(false);
+    const emoji = '\u{1F41D}'.repeat(MAX_QUOTE_LENGTH);
+    // 120 code points are 240 UTF-16 units: still within the limit.
+    expect(quoteInText(emoji, emoji)).toBe(false); // emoji are not letters or digits
+    const letters = '\u{1D400}'.repeat(MAX_QUOTE_LENGTH);
+    expect(quoteInText(letters, letters)).toBe(true);
+  });
+
+  it('returns null when a cut leaves nothing', () => {
+    expect(sanitizeFreeText('abc', 0)).toBeNull();
+  });
+});
diff --git a/ApiCore-Backend/src/voice/core/voice-text.ts b/ApiCore-Backend/src/voice/core/voice-text.ts
new file mode 100644
index 0000000..4e5c2c2
--- /dev/null
+++ b/ApiCore-Backend/src/voice/core/voice-text.ts
@@ -0,0 +1,84 @@
+/** A quote longer than this is not a quote of one remark (spec 6.5). */
+export const MAX_QUOTE_LENGTH = 120;
+
+const CONTROL_CHARACTERS = /\p{Cc}/gu;
+// Format characters (bidi marks, zero-width, BOM) change how text looks, not what it says.
+const FORMAT_CHARACTERS = /\p{Cf}/gu;
+const LINE_BREAKS = /[\r\n\t\u2028\u2029]+/g;
+// A decimal separator between digits is kept as part of the number.
+const DECIMAL_SEPARATOR = /(\d)[.,](?=\d)/g;
+const DECIMAL_MARK = '\uE000';
+const ANGLE_BRACKETS = /[<>]/g;
+const NOT_LETTER_OR_DIGIT_OR_MARK = /[^\p{L}\p{N}\uE000]+/gu;
+
+/**
+ * NFKC; tabs, lone carriage returns and the Unicode line separators become
+ * spaces; other control and format characters are removed; trimmed. Line
+ * feeds stay.
+ */
+export function normalizeInputText(text: string): string {
+  return text
+    .normalize('NFKC')
+    .replace(/\r(?!\n)|[\t\u2028\u2029]/g, ' ')
+    .replace(/[^\P{Cc}\n]/gu, '')
+    .replace(FORMAT_CHARACTERS, '')
+    .trim();
+}
+
+/**
+ * The form quotes are compared in: NFKC, lower case, only letters and
+ * digits, single spaces. "3,5" and "3.5" stay one token ("3.5"), so a quote
+ * "5 Waben" is not found in "3,5 Waben".
+ */
+export function normalizeForQuote(text: string): string {
+  return text
+    .normalize('NFKC')
+    .toLowerCase()
+    .replace(DECIMAL_SEPARATOR, `$1${DECIMAL_MARK}`)
+    .replace(NOT_LETTER_OR_DIGIT_OR_MARK, ' ')
+    .replaceAll(DECIMAL_MARK, '.')
+    .trim();
+}
+
+/**
+ * Whether the quote stands in the text, whole words only ("12" is not in
+ * "112"). This is the barrier against values the model made up.
+ */
+export function quoteInText(quote: string, text: string): boolean {
+  if (Array.from(quote).length > MAX_QUOTE_LENGTH) {
+    return false;
+  }
+  const wanted = normalizeForQuote(quote);
+  if (wanted === '') {
+    return false;
+  }
+  return ` ${normalizeForQuote(text)} `.includes(` ${wanted} `);
+}
+
+/**
+ * Free text from the model: line breaks become spaces, other control
+ * characters and angle brackets disappear, at most `max` characters
+ * (code points). Null if nothing is left.
+ */
+export function sanitizeFreeText(
+  text: string,
+  max: number,
+): { text: string; truncated: boolean } | null {
+  const cleaned = text
+    .normalize('NFKC')
+    .replace(LINE_BREAKS, ' ')
+    .replace(CONTROL_CHARACTERS, '')
+    .replace(FORMAT_CHARACTERS, '')
+    .replace(ANGLE_BRACKETS, '')
+    .replace(/ {2,}/g, ' ')
+    .trim();
+  if (cleaned === '') {
+    return null;
+  }
+  const characters = Array.from(cleaned);
+  if (characters.length <= max) {
+    return { text: cleaned, truncated: false };
+  }
+  const cut = characters.slice(0, max).join('').trimEnd();
+  return cut === '' ? null : { text: cut, truncated: true };
+}
diff --git a/ApiCore-Backend/src/voice/core/voice-vocabulary.spec.ts b/ApiCore-Backend/src/voice/core/voice-vocabulary.spec.ts
new file mode 100644
index 0000000..689dd68
--- /dev/null
+++ b/ApiCore-Backend/src/voice/core/voice-vocabulary.spec.ts
@@ -0,0 +1,80 @@
+import { readFileSync } from 'node:fs';
+import { join } from 'node:path';
+import { INSPECTION_SCALES } from './inspection-scales';
+import { VOICE_ERROR_CODES } from './voice-errors';
+import { VOICE_VOCABULARY, whisperInitialPrompt } from './voice-vocabulary';
+
+const FIXTURES = join(__dirname, '..', '..', '..', 'test', 'fixtures', 'voice');
+
+function fixture(name: string): unknown {
+  return JSON.parse(readFileSync(join(FIXTURES, name), 'utf8')) as unknown;
+}
+
+describe('voice vocabulary', () => {
+  it('VOICE_VOCABULARY equals the shared fixture', () => {
+    expect([...VOICE_VOCABULARY]).toEqual(fixture('vocabulary.json'));
+  });
+
+  it('has no duplicates or blanks', () => {
+    expect(new Set(VOICE_VOCABULARY).size).toBe(VOICE_VOCABULARY.length);
+    for (const word of VOICE_VOCABULARY) {
+      expect(word.trim()).toBe(word);
+      expect(word.length).toBeGreaterThan(0);
+    }
+  });
+
+  it('whisperInitialPrompt stays below 800 characters', () => {
+    const prompt = whisperInitialPrompt();
+    expect(prompt.length).toBeLessThan(800);
+    for (const word of VOICE_VOCABULARY) {
+      expect(prompt).toContain(word);
+    }
+  });
+});
+
+describe('inspection scales', () => {
+  it('INSPECTION_SCALES equals the shared fixture', () => {
+    expect(JSON.parse(JSON.stringify(INSPECTION_SCALES))).toEqual(
+      fixture('inspection-scales.json'),
+    );
+  });
+
+  it('describes the four 1-5 scales of the form, with the stored ends', () => {
+    expect(INSPECTION_SCALES.map((scale) => scale.field)).toEqual([
+      'broodPattern',
+      'swarmMood',
+      'gentleness',
+      'combBehavior',
+    ]);
+    const swarm = INSPECTION_SCALES.find(
+      (scale) => scale.field === 'swarmMood',
+    );
+    // Stored 1 is the calm end for swarm mood, unlike the other scales.
+    expect(swarm).toMatchObject({ storedOne: 'ruhig', storedFive: 'stark' });
+    for (const scale of INSPECTION_SCALES) {
+      expect(scale.anchors[scale.storedOne]).toBe(1);
+      expect(scale.anchors[scale.storedFive]).toBe(5);
+    }
+  });
+});
+
+describe('voice error codes', () => {
+  it('lists the fourteen fixed codes of the plan', () => {
+    expect([...VOICE_ERROR_CODES]).toEqual([
+      'UNSUPPORTED_AUDIO',
+      'TOO_LARGE',
+      'TOO_MANY_OPEN',
+      'NO_SPEECH',
+      'TOO_LONG',
+      'TRANSCRIBE_FAILED',
+      'AUDIO_EXPIRED',
+      'EXTRACT_DISABLED',
+      'EXTRACT_RETRY',
+      'EXTRACT_FAILED',
+      'DAILY_LIMIT',
+      'EXTRACT_INVALID',
+      'REFUSED',
+      'VOICE_CAPTURE_GONE',
+    ]);
+  });
+});
diff --git a/ApiCore-Backend/src/voice/core/voice-vocabulary.ts b/ApiCore-Backend/src/voice/core/voice-vocabulary.ts
new file mode 100644
index 0000000..67eb569
--- /dev/null
+++ b/ApiCore-Backend/src/voice/core/voice-vocabulary.ts
@@ -0,0 +1,47 @@
+/**
+ * Beekeeping words that speech recognition tends to mishear. One source for
+ * Whisper (initial prompt), the Claude prompt and the browser phrases. The
+ * frontend reads the same list from test/fixtures/voice/vocabulary.json; a
+ * test keeps both equal.
+ */
+export const VOICE_VOCABULARY: readonly string[] = [
+  'Königin',
+  'Stifte',
+  'Weiselzellen',
+  'Brutwaben',
+  'Futterkranz',
+  'Honigraum',
+  'Varroa',
+  'Schwarmstimmung',
+  'sanftmütig',
+  'Wabensitz',
+  'Drohnenbrut',
+  'Brutnest',
+  'Brutfläche',
+  'Spielnäpfchen',
+  'Schwarmzellen',
+  'Absperrgitter',
+  'Futterteig',
+  'Ableger',
+  'Jungvolk',
+  'Rähmchen',
+  'Mittelwand',
+  'Flugloch',
+  'Beute',
+  'Zarge',
+  'Ameisensäure',
+  'Oxalsäure',
+  'Windel',
+  'Faulbrut',
+  'Kalkbrut',
+  'Nosema',
+  'Wachsmotten',
+  'Pollen',
+];
+
+/** Whisper reads about 224 tokens of prompt; 800 characters stay safely below. */
+const PROMPT_PREFIX = 'Durchsicht am Bienenvolk: ';
+
+export function whisperInitialPrompt(): string {
+  return `${PROMPT_PREFIX}${VOICE_VOCABULARY.join(', ')}.`;
+}
diff --git a/ApiCore-Backend/src/voice/voice-config.spec.ts b/ApiCore-Backend/src/voice/voice-config.spec.ts
new file mode 100644
index 0000000..c23c734
--- /dev/null
+++ b/ApiCore-Backend/src/voice/voice-config.spec.ts
@@ -0,0 +1,76 @@
+import { DEFAULT_VOICE_MODEL, VOICE_MODELS, voiceConfig } from './voice-config';
+
+describe('voiceConfig', () => {
+  it('uses the defaults for an empty environment', () => {
+    expect(voiceConfig({})).toEqual({
+      model: 'claude-sonnet-5-5',
+      dailyExtractions: 60,
+      recordingEnabled: false,
+      whisperModel: 'small',
+    });
+    expect(DEFAULT_VOICE_MODEL).toBe('claude-sonnet-5-5');
+    expect(VOICE_MODELS).toEqual([
+      'claude-sonnet-5-5',
+      'claude-haiku-5-5',
+      'claude-opus-5-5',
+    ]);
+  });
+
+  it('reads every setting, trimmed', () => {
+    expect(
+      voiceConfig({
+        VOICE_MODEL: ' claude-haiku-5-5 ',
+        VOICE_DAILY_EXTRACTIONS: '120',
+        VOICE_RECORDING_ENABLED: 'true',
+        WHISPER_MODEL: 'medium',
+      }),
+    ).toEqual({
+      model: 'claude-haiku-5-5',
+      dailyExtractions: 120,
+      recordingEnabled: true,
+      whisperModel: 'medium',
+    });
+  });
+
+  it('treats blank values as unset', () => {
+    expect(
+      voiceConfig({ VOICE_MODEL: ' ', VOICE_DAILY_EXTRACTIONS: '' }),
+    ).toMatchObject({ model: DEFAULT_VOICE_MODEL, dailyExtractions: 60 });
+  });
+
+  it('voiceConfig rejects an unknown model id', () => {
+    expect(() => voiceConfig({ VOICE_MODEL: 'gpt-5' })).toThrow(
+      /VOICE_MODEL must be one of claude-sonnet-5-5, claude-haiku-5-5, claude-opus-5-5/,
+    );
+  });
+
+  it.each(['0', '10001', '-1', '1.5', 'many'])(
+    'rejects %s as VOICE_DAILY_EXTRACTIONS',
+    (value) => {
+      expect(() => voiceConfig({ VOICE_DAILY_EXTRACTIONS: value })).toThrow(
+        'VOICE_DAILY_EXTRACTIONS must be a whole number from 1 to 10000',
+      );
+    },
+  );
+
+  it('rejects unknown switch and Whisper model values', () => {
+    expect(() => voiceConfig({ VOICE_RECORDING_ENABLED: 'yes' })).toThrow(
+      'VOICE_RECORDING_ENABLED must be "true" or "false"',
+    );
+    expect(() => voiceConfig({ WHISPER_MODEL: 'large' })).toThrow(
+      'WHISPER_MODEL must be one of small, medium',
+    );
+  });
+
+  it('reads VOICE_RECORDING_ENABLED case-insensitively', () => {
+    expect(
+      voiceConfig({ VOICE_RECORDING_ENABLED: 'TRUE' }).recordingEnabled,
+    ).toBe(true);
+    expect(
+      voiceConfig({ VOICE_RECORDING_ENABLED: ' False ' }).recordingEnabled,
+    ).toBe(false);
+    expect(() => voiceConfig({ VOICE_RECORDING_ENABLED: '1' })).toThrow(
+      'must be "true" or "false"',
+    );
+  });
+});
diff --git a/ApiCore-Backend/src/voice/voice-config.ts b/ApiCore-Backend/src/voice/voice-config.ts
new file mode 100644
index 0000000..f6fcbac
--- /dev/null
+++ b/ApiCore-Backend/src/voice/voice-config.ts
@@ -0,0 +1,99 @@
+/**
+ * Voice settings from the environment. Model ids live here and nowhere else
+ * (spec 7.1): a change of model is a change of this list and of VOICE_MODEL.
+ */
+export const VOICE_MODELS = [
+  'claude-sonnet-5-5',
+  'claude-haiku-5-5',
+  'claude-opus-5-5',
+] as const;
+export type VoiceModel = (typeof VOICE_MODELS)[number];
+
+export const DEFAULT_VOICE_MODEL: VoiceModel = 'claude-sonnet-5-5';
+
+export const WHISPER_MODELS = ['small', 'medium'] as const;
+export type WhisperModel = (typeof WHISPER_MODELS)[number];
+
+const DEFAULT_DAILY_EXTRACTIONS = 60;
+const MIN_DAILY_EXTRACTIONS = 1;
+const MAX_DAILY_EXTRACTIONS = 10000;
+
+export interface VoiceConfig {
+  model: VoiceModel;
+  /** Operation-wide limit of Claude calls per UTC day. */
+  dailyExtractions: number;
+  /** Switch that shows or hides audio recording in the app (ConfigMap). */
+  recordingEnabled: boolean;
+  whisperModel: WhisperModel;
+}
+
+function trimmed(value: string | undefined): string | null {
+  const text = value?.trim();
+  return text ? text : null;
+}
+
+function oneOf<T extends string>(
+  name: string,
+  raw: string | undefined,
+  allowed: readonly T[],
+  fallback: T,
+): T {
+  const value = trimmed(raw);
+  if (value === null) {
+    return fallback;
+  }
+  const match = allowed.find((each) => each === value);
+  if (match === undefined) {
+    throw new Error(`${name} must be one of ${allowed.join(', ')}`);
+  }
+  return match;
+}
+
+function dailyExtractions(raw: string | undefined): number {
+  const value = trimmed(raw);
+  if (value === null) {
+    return DEFAULT_DAILY_EXTRACTIONS;
+  }
+  const number = /^\d+$/.test(value) ? Number(value) : NaN;
+  if (
+    !Number.isInteger(number) ||
+    number < MIN_DAILY_EXTRACTIONS ||
+    number > MAX_DAILY_EXTRACTIONS
+  ) {
+    throw new Error(
+      `VOICE_DAILY_EXTRACTIONS must be a whole number from ${MIN_DAILY_EXTRACTIONS} to ${MAX_DAILY_EXTRACTIONS}`,
+    );
+  }
+  return number;
+}
+
+function recordingEnabled(raw: string | undefined): boolean {
+  const value = trimmed(raw)?.toLowerCase() ?? null;
+  if (value === null || value === 'false') {
+    return false;
+  }
+  if (value === 'true') {
+    return true;
+  }
+  throw new Error('VOICE_RECORDING_ENABLED must be "true" or "false"');
+}
+
+/** Invalid values fail with the variable name (never a secret): startup refuses them. */
+export function voiceConfig(env: NodeJS.ProcessEnv = process.env): VoiceConfig {
+  return {
+    model: oneOf(
+      'VOICE_MODEL',
+      env.VOICE_MODEL,
+      VOICE_MODELS,
+      DEFAULT_VOICE_MODEL,
+    ),
+    dailyExtractions: dailyExtractions(env.VOICE_DAILY_EXTRACTIONS),
+    recordingEnabled: recordingEnabled(env.VOICE_RECORDING_ENABLED),
+    whisperModel: oneOf(
+      'WHISPER_MODEL',
+      env.WHISPER_MODEL,
+      WHISPER_MODELS,
+      'small',
+    ),
+  };
+}
diff --git a/ApiCore-Backend/test/fixtures/voice/inspection-scales.json b/ApiCore-Backend/test/fixtures/voice/inspection-scales.json
new file mode 100644
index 0000000..2850c06
--- /dev/null
+++ b/ApiCore-Backend/test/fixtures/voice/inspection-scales.json
@@ -0,0 +1,26 @@
+[
+  {
+    "field": "broodPattern",
+    "storedOne": "lückenhaft",
+    "storedFive": "geschlossen",
+    "anchors": { "lückenhaft": 1, "mittel": 3, "geschlossen": 5 }
+  },
+  {
+    "field": "swarmMood",
+    "storedOne": "ruhig",
+    "storedFive": "stark",
+    "anchors": { "ruhig": 1, "mittel": 3, "stark": 5 }
+  },
+  {
+    "field": "gentleness",
+    "storedOne": "stechlustig",
+    "storedFive": "sehr sanft",
+    "anchors": { "stechlustig": 1, "normal": 3, "sehr sanft": 5 }
+  },
+  {
+    "field": "combBehavior",
+    "storedOne": "läuft weg",
+    "storedFive": "sitzt ruhig",
+    "anchors": { "läuft weg": 1, "mittel": 3, "sitzt ruhig": 5 }
+  }
+]
diff --git a/ApiCore-Backend/test/rekey.e2e-spec.ts b/ApiCore-Backend/test/rekey.e2e-spec.ts
index 03741c1..3ae1d97 100644
--- a/ApiCore-Backend/test/rekey.e2e-spec.ts
+++ b/ApiCore-Backend/test/rekey.e2e-spec.ts
@@ -314,6 +314,8 @@ describe('rekey job (e2e)', () => {
         },
       },
       webhookSubscription: prisma.webhookSubscription,
+      voiceCapture: prisma.voiceCapture,
+      voiceCaptureAudio: prisma.voiceCaptureAudio,
     } as unknown as PrismaService;
 
     const result = await new RekeyJob(racing).run([]);
diff --git a/deploy/k8s/base/backend/secret.example.yaml b/deploy/k8s/base/backend/secret.example.yaml
index 08b597c..1a4a80c 100644
--- a/deploy/k8s/base/backend/secret.example.yaml
+++ b/deploy/k8s/base/backend/secret.example.yaml
@@ -17,8 +17,8 @@ stringData:
   JWT_ACCESS_SECRET: "change-me-to-a-random-value-at-least-32-characters-long"
   JWT_REFRESH_SECRET: "change-me-refresh-secret"
   # One encryption key per purpose (TOTP secrets, webhook signing secrets,
-  # backup files). Required in production: at least 32 characters each, all
-  # three different from each other and from both JWT secrets.
+  # backup files, voice notes). Required in production: at least 32 characters
+  # each, all four different from each other and from both JWT secrets.
   # BACKUP_ENCRYPTION_KEY (with MFA_/WEBHOOK_ENCRYPTION_KEY for MFA and webhook
   # secrets) is needed to restore backups on another deployment.
   # Rotation: old value to <NAME>_PREVIOUS, new <NAME>, run the rekey job,
@@ -27,9 +27,13 @@ stringData:
   MFA_ENCRYPTION_KEY: "change-me-to-a-third-random-value-at-least-32-characters"
   WEBHOOK_ENCRYPTION_KEY: "change-me-to-a-fourth-random-value-at-least-32-characters"
   BACKUP_ENCRYPTION_KEY: "change-me-to-another-random-value-at-least-32-characters"
+  # VOICE_ENCRYPTION_KEY seals audio, transcripts and suggestions of voice notes.
+  # It must exist before the T7 backend image rolls out (every role checks it).
+  VOICE_ENCRYPTION_KEY: "change-me-to-a-fifth-random-value-at-least-32-characters"
   # MFA_ENCRYPTION_KEY_PREVIOUS: ""
   # WEBHOOK_ENCRYPTION_KEY_PREVIOUS: ""
   # BACKUP_ENCRYPTION_KEY_PREVIOUS: ""
+  # VOICE_ENCRYPTION_KEY_PREVIOUS: ""
   # Entra ID App-Registrierung (SSO). Siehe configmap.example.yaml
   # fuer OIDC_ISSUER_URL/OIDC_REDIRECT_URI. Wird auch fuer die
   # M365-Kalender-Synchronisation wiederverwendet - dafuer in der
@@ -55,3 +59,18 @@ stringData:
 # type: Opaque
 # stringData:
 #   TELEGRAM_BOT_TOKEN: "<token-from-botfather>"
+
+# Anthropic-API-Schluessel fuer die Auswertung der Sprachnotizen (optional) -
+# NICHT in diesem Secret, sondern im eigenen Secret apicore-anthropic, das nur
+# der Worker einbindet (einzelne secretKeyRef-Variable ANTHROPIC_API_KEY mit
+# optional: true, kein envFrom, kein Volume; Muster apicore-telegram). API- und
+# Job-Pods lesen ihn nie. Der Inhaber legt das Secret selbst an; ohne
+# Schluessel bleibt die Auswertung aus (EXTRACT_DISABLED), alles andere laeuft.
+#
+# apiVersion: v1
+# kind: Secret
+# metadata:
+#   name: apicore-anthropic
+# type: Opaque
+# stringData:
+#   ANTHROPIC_API_KEY: "<key-from-the-anthropic-console>"
diff --git a/deploy/k8s/scripts/ensure-secrets.sh b/deploy/k8s/scripts/ensure-secrets.sh
index cb9f9ae..de4185c 100644
--- a/deploy/k8s/scripts/ensure-secrets.sh
+++ b/deploy/k8s/scripts/ensure-secrets.sh
@@ -6,10 +6,13 @@
 #   bash deploy/k8s/scripts/ensure-secrets.sh --dry-run  # nur anzeigen
 #
 # Werte:
-# - MFA_/WEBHOOK_/BACKUP_ENCRYPTION_KEY: zufaellig (48 Byte, base64url). Die
+# - MFA_/WEBHOOK_/BACKUP_/VOICE_ENCRYPTION_KEY: zufaellig (48 Byte, base64url). Die
 #   App verlangt mindestens 32 Zeichen; "dummy" wuerde den Start abbrechen.
 #   Diese Schluessel nie wieder aendern ohne *_PREVIOUS (sonst sind MFA-
-#   Geheimnisse, Webhook-Secrets und Backups nicht mehr lesbar). Sichern!
+#   Geheimnisse, Webhook-Secrets, Backups und offene Sprachnotizen nicht mehr
+#   lesbar). Sichern!
+#   VOICE_ENCRYPTION_KEY muss vor dem Rollout des T7-Backend-Images existieren:
+#   die App verlangt ihn in Produktion in jeder Rolle und startet sonst nicht.
 # - OPEN_METEO_API_KEY: leer = freie Open-Meteo-API (ein Fantasiewert wuerde
 #   die kostenpflichtige API mit falschem Schluessel ansprechen).
 # - TELEGRAM_BOT_TOKEN (Secret apicore-telegram, nur Worker): "dummy". Die App
@@ -83,9 +86,14 @@ ensure_keys apicore-backend-secret \
   MFA_ENCRYPTION_KEY random \
   WEBHOOK_ENCRYPTION_KEY random \
   BACKUP_ENCRYPTION_KEY random \
+  VOICE_ENCRYPTION_KEY random \
   OPEN_METEO_API_KEY empty
 
 ensure_keys apicore-telegram \
   TELEGRAM_BOT_TOKEN dummy
 
+# apicore-anthropic (ANTHROPIC_API_KEY, nur Worker, optional) legt der Inhaber
+# selbst an; dieses Skript erzeugt es nicht. Ohne Schluessel bleibt die
+# Auswertung der Sprachnotizen aus (EXTRACT_DISABLED), alles andere laeuft.
+
 echo "Fertig. Laufende Pods lesen neue Werte erst nach einem Neustart."