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Voice Changer API

Convert source vocals with a configured voice pack. The voice changer API supports accent strength, tonality reference, and async output delivery.

Highlights
Voice packs · accent strength control
Best for
Voiceovers, character voices, dubs
Input
Audio file URL + voice pack
Output
Converted audio
Input
0/1 file

MP3 / WAV / AAC / OGG

Required

Any number from 0 to 1; default 1

source_file or voice_pack

Optional

mp3, wav, flac, aac, or ogg

Result

Pricing

Credit-based — 1 credit = $0.001 USD. Pay only for completed generations.

First test cost
$0.2200 credits

One sample at the cheapest tier (1 started minute).

Testing budget guide
Add credits
$10
≈ 50 tests
$50
≈ 250 tests
$100
≈ 500 tests
Source voice
$0.2
Price · 1 started minute

What you can build with this model

Real-world workflows and production use cases you can build and ship with this model.

vocal recording transformed into a target voice pack

Voice changer API for voice pack conversion

Use the voice changer API when your product already has a target voice pack id and needs to convert source vocals through an async backend call. The user chooses a pack, your backend sends voice_pack_id, and the task returns converted_mix output. That fits apps where voice selection happens in your own product before audio processing starts. The voice changer API keeps the audio task focused on conversion while your app owns pack browsing and permissions.

Change a voice
voice style controls for accent and tonality

Voice changer API controls for accent and tonality

Set accent from 0 to 1 and choose source_file or voice_pack tonality. The voice changer API gives product teams clear controls without a complicated audio editor. That keeps the conversion form understandable for non-engineering users. Your UI can expose simple defaults first, then let advanced users tune only the fields they understand. The voice changer API works well when the product needs a guided voice-pack flow rather than a full editing surface.

voice pack library connected to audio conversion tasks

Voice changer API output for publishing flows

Completed voice changer API tasks return the converted voice as a downloadable track. Store it, preview it, or send it into moderation and publishing flows. output.tracks can identify converted_mix when labels are available.

Why reAPI for Voice Changer API

Why this voice changer API requires a voice pack

The voice changer API requires voice_pack_id, so each task targets the configured voice asset your product selected. That keeps conversion behavior tied to a known pack. It also keeps pack selection outside the audio upload itself.

Small controls, useful range

Accent uses a real 0 to 1 value, and tonality_reference accepts source_file or voice_pack. Those fields cover the common style choices without burying users in audio terms. Save the submitted values with each task so support and moderation teams can reproduce a result later.

Voice changer API with the same polling contract

Submit a task and poll /api/v1/tasks/:id until completion. The voice changer API fits the same async model as the other reAPI audio pages. Backend teams can reuse task storage, retries, and result handling. The voice changer API works best when the UI shows queued, processing, completed, and failed states clearly.

Integrate the voice changer API in three steps

  1. step 01

    Create an API key

    Generate a reAPI key from workspace settings. Keep the voice changer API call on your backend so voice pack ids and keys stay server-side.

    Open
  2. step 02

    Submit a conversion task

    POST model audio-voice-change with audio_url and voice_pack_id. Add accent, tonality_reference, dereverb_enabled, or encoder_format when your flow needs them.

    Open
  3. step 03

    Poll and play the result

    GET /api/v1/tasks/:id until completed. Download output.audio_urls or use output.tracks to find the converted_mix track.

    Open
docs/api/voice-changer

API reference

Drop-in code and the full parameter table.

View full reference
curl https://reapi.ai/api/v1/audio/generations \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"audio-voice-change","audio_url":"https://cdn.example.com/source-vocal.wav","voice_pack_id":"voice_pack_id_here","accent":1,"encoder_format":"mp3"}'

Parameter validation failed

Rejected synchronously with the failing field named. Check enum values, ranges, and URL fields — nothing is charged.

Authentication or balance issue

401 means a missing or invalid Bearer key; 402 means the reserve exceeds your balance. Manage keys and credits in the console.

Content or material rejected

Reference material and outputs pass automated moderation. Rejected tasks fail with a clear error and a full refund.

Task failed or timed out

A task that reaches a failed state is never charged — the reserve refunds automatically. Keep the task id and retry when ready.

Frequently asked questions

Common questions about this model.

The voice changer API is an async voice conversion endpoint. Send a source vocal audio_url with a required voice_pack_id, then poll until converted_mix audio output is ready. Use the voice changer API when your product needs voice pack conversion without building an editor.

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Ready to ship?

Try it in the playground or grab an API key to integrate now.

Try voice changeView voice changer docs