---
title: "Voice isolation"
method: POST
path: "/v1/voice_isolation"
tags: ["Start generating"]
---

# Voice isolation

`POST /v1/voice_isolation`

This endpoint will start a new task to isolate the voice from the background audio. Audio duration must be greater than 4.6 seconds and less than 3600 seconds.

## Headers

- `X-Runway-Version` '2024-11-06', required

## Request body

- object
  - `audioUri` union, required — A HTTPS URL, Runway or data URI containing an encoded audio. See [our docs](/assets/inputs#audio) on audio inputs for more information.
    - string — A HTTPS URL, Runway upload URI, or base64 data URI (e.g. `data:audio/mp3;base64,...`, up to 16MB) containing an encoded audio. See [our docs](/assets/inputs#audio) on audio inputs for more information.
    - string — A Runway upload URI. See https://docs.dev.runwayml.com/assets/uploads for more information.
    - string — A data URI containing encoded media.
  - `model` 'eleven_voice_isolation', required

## Response `200`

The task that was created.

- object
  - `id` string, uuid, required — The ID of the task that was created. Use this to retrieve the task later.
  - `estimatedCost` object, required — The maximum credits this task may charge. The final amount may be lower after the task completes.
    - `credits` number, required — Estimated cost of the generation in credits.

## Other responses

- `400` — The request was rejected. Inspect `error` or `issues` (when present) and retry with a corrected request.
- `429` — You have exceeded the rate limit for this endpoint.

## Changes

- **2026-08-07** `73a12c23285c` — 2 info
  - added the non-success response with the status `400`
  - added the required property `estimatedCost` to the response with the `200` status
- **2025-12-04** `6dab1bdab5d3` — 2 info
  - the `model` request property default value `eleven_voice_isolation` was removed
  - added the media type `application/json` for the response with the status `429`
- **2025-12-03** `c2a88516fa0c` — 1 info
  - the `model` request property default value `eleven_voice_isolation` was added
- **2025-12-03** `76b3962cf49e` — 1 info
  - the `model` request property default value `eleven_voice_isolation` was removed
- **2025-11-04** `6902fa9494c5` — 1 breaking, 2 info
  - removed `subschema #1, subschema #2` from the `oneOf[subschema #1: eleven_voice_isolation]/audioUri` request property `anyOf` list
  - added `subschema #1, subschema #2, subschema #3` to the `oneOf[subschema #1: eleven_voice_isolation]/audioUri` request property `anyOf` list
  - the `model` request property default value `eleven_voice_isolation` was added

[Full history](https://skmtc.dev/runwayml/apis/runwayml-api/changes/v1/voice_isolation/post.md)

---

[API](https://skmtc.dev/runwayml/apis/runwayml-api.md) · [All operations](https://skmtc.dev/runwayml/apis/runwayml-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/runwayml/runwayml-api/revisions/efc9e5abc4d0/schema)