Add Instrumental

Endpoint

POST /api/v1/music/add-instrumental

Asynchronous. Returns a task_id. Poll Get Task for results. Takes a vocal audio clip (uploaded via Upload Audio) and adds AI-generated instrumental music underneath it.

Request body

Field	Type	Required	Description
`clip_id`	string	Yes	Clip ID of the source vocal audio (from Upload Audio).
`start_s`	float	No	Start time in seconds of the vocal segment to use. Default `0`.
`end_s`	float	No	End time in seconds of the vocal segment. Default `0` (use full clip).
`mv`	string	No	Model version (e.g. `"chirp-v3-5"`). Uses default if omitted.
`callback_url`	string	No	Webhook URL for completion notification. See Webhooks.
`retention_days`	integer	No	Days to retain audio files. Default `7`.

Response

{
  "code": 0,
  "message": "ok",
  "request_id": "req-1710000000000",
  "data": {
    "task_id": "64f3a1b2c8d9e0f1a2b3c4d5",
    "status": "queuing"
  }
}

Workflow

Upload your vocal audio via Upload Audio → get clipId
Call this endpoint with the clipId → get task_id
Poll Get Task until status = "completed"
Access the generated track via results[].audio_url

Example

# 1. Upload vocal audio
CLIP_ID=$(curl -s -X POST https://api.example.com/api/v1/music/upload \
  -H "Authorization: Bearer sk-mm-your-key" \
  -H "Content-Type: application/json" \
  -d '{"audio_url":"https://example.com/my-vocals.mp3"}' \
  | jq -r '.data.clipId')

# 2. Add instrumental
curl -X POST https://api.example.com/api/v1/music/add-instrumental \
  -H "Authorization: Bearer sk-mm-your-key" \
  -H "Content-Type: application/json" \
  -d "{
    \"clip_id\": \"$CLIP_ID\",
    \"start_s\": 0,
    \"end_s\": 30
  }"

Getting Started

Overview

Music Generation

Lyrics

Audio Processing

AI Singer (Persona)

Tasks & Results

Endpoint

Request body

Response

Workflow

Example

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Endpoint

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Example