---
title: "Changes voice in the audio file using voice pack"
method: POST
path: "/api/v1/change_voice/"
tags: ["Voice Change"]
---

# Changes voice in the audio file using voice pack

`POST /api/v1/change_voice/`

For 'voice_pack_id' parameter use 'pack_id' from /voice_packs/list/ endpoint or one of legal packs: ['ALEX_KAYE', 'STASIA_FAYE', 'NICOLAAS_HAAS', 'NIK_ZEL', 'OLIA_CHEBO', 'YVAR_DE_GROOT', 'VETRANA']

    Result of /check/ includes 1 track with label 'converted_mix'.
    {"label":"converted_mix", "type":"back", "url":"..."}

## Request body

- VoiceChangeParameters
  - `source_id` string, uuid4, required — ID of the source file to be processed.
  - `presets` VoiceChangePresetsV1, required
    - `voice_pack_id` string, required — ID of the voice pack to be used for voice conversion. Could be one of the legal packs, provided by us. Could be a custom voice pack from voice cloner, trained by the user(see /voice_packs/list/).
    - `accent` number — Float value, changing intensity in range from 0.0 to 1.0 0.0 preserves the source file accent and 1.0 applies the voice pack accent.
    - `tonality_reference` 'source_file' | 'voice_pack'
    - `dereverb_enabled` boolean — Enabling dereverb removes echo from the audio for clarity, which may slightly alter the voice. Disabling dereverb preserves the natural echo of the recording for authenticity.
    - `encoder_format` 'mp3' | 'wav' | 'flac' | 'aac' | 'ogg'
  - `idempotency_key` string, uuid4, nullable — Unique uuid4 key to ensure idempotent requests. Prevents duplicate task execution with the same parameters. Can be reused until the task starts. Once processing begins, reusing this key will return an error.

## Response `200`

OK

- TaskResponse
  - `task_id` string, required — ID of the created task.

## Other responses

- `400` — Bad Request
- `422` — Unprocessable Entity

---

[API](https://skmtc.net/lalal/apis/lalal-ai-api.md) · [All operations](https://skmtc.net/lalal/apis/lalal-ai-api/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/lalal/lalal-ai-api/revisions/ebb545e26e94/schema)