Skip to main content
POST
/
suno
/
v2
/
adjustSpeed
Adjust Speed
curl --request POST \
  --url https://api.mountsea.ai/suno/v2/adjustSpeed \
  --header 'Content-Type: application/json' \
  --data '
{
  "clip_id": "<string>",
  "speed_multiplier": 123,
  "keep_pitch": true,
  "title": "<string>"
}
'
{
  "taskId": "<string>"
}
Adjust the playback speed of an existing clip. Returns a new clip with the adjusted speed.

​
Request Body

​
clip_id
string
required
The source clip ID to adjust speed for.
​
speed_multiplier
number
required
Speed multiplier value between 0.25 and 4.0.
ValueEffect
0.254x slower (minimum)
0.52x slower
1.0Original speed
1.51.5x faster
2.02x faster
4.04x faster (maximum)
​
keep_pitch
boolean
default:"true"
Whether to keep the original pitch when adjusting speed.
  • true: Maintains original pitch (recommended)
  • false: Pitch changes with speed
​
title
string
Optional new title for the adjusted clip.

​
Response

​
taskId
string
The task ID. Use this to query task status via Get Task Status.

​
Example

curl -X POST https://api.mountsea.ai/suno/v2/adjustSpeed \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer your-api-key" \
  -d '{
    "clip_id": "your-clip-id",
    "speed_multiplier": 1.45,
    "keep_pitch": true,
    "title": "My Song (1.45x)"
  }'

​
Response Example

{
  "taskId": "15c257ff-43f7-4678-bd41-202ad6b8488b"
}
Set keep_pitch to true to maintain the original vocal character when speeding up or slowing down. This uses time-stretching algorithms to preserve pitch.
Extreme speed adjustments (close to 0.25 or 4.0) may result in audio artifacts. For best quality, stay within 0.75 - 1.5x range.