---
title: "MusicPlayerSetPlayRateScalar(_:_:)"
framework: audiotoolbox
role: symbol
role_heading: Function
path: "audiotoolbox/musicplayersetplayratescalar(_:_:)"
---

# MusicPlayerSetPlayRateScalar(_:_:)

Sets a playback rate multiplier for a music player.

## Declaration

```swift
func MusicPlayerSetPlayRateScalar(_ inPlayer: MusicPlayer, _ inScaleRate: Float64) -> OSStatus
```

## Parameters

- `inPlayer`: The music player that you want to set a playback rate multiplier on.
- `inScaleRate`: The playback rate multiplier to apply to the music player. For example, setting this parameter to a value of 2 doubles the playback rate. Must be greater than 0.

## Return Value

Return Value A result code

## Discussion

Discussion A music player’s default playback rate multiplier is 1.0.

## See Also

### Managing a Music Player

- [NewMusicPlayer(_:)](audiotoolbox/newmusicplayer(_:).md)
- [DisposeMusicPlayer(_:)](audiotoolbox/disposemusicplayer(_:).md)
- [MusicPlayerGetBeatsForHostTime(_:_:_:)](audiotoolbox/musicplayergetbeatsforhosttime(_:_:_:).md)
- [MusicPlayerGetHostTimeForBeats(_:_:_:)](audiotoolbox/musicplayergethosttimeforbeats(_:_:_:).md)
- [MusicPlayerGetPlayRateScalar(_:_:)](audiotoolbox/musicplayergetplayratescalar(_:_:).md)
- [MusicPlayerGetSequence(_:_:)](audiotoolbox/musicplayergetsequence(_:_:).md)
- [MusicPlayerGetTime(_:_:)](audiotoolbox/musicplayergettime(_:_:).md)
- [MusicPlayerIsPlaying(_:_:)](audiotoolbox/musicplayerisplaying(_:_:).md)
- [MusicPlayerPreroll(_:)](audiotoolbox/musicplayerpreroll(_:).md)
- [MusicPlayerSetSequence(_:_:)](audiotoolbox/musicplayersetsequence(_:_:).md)
- [MusicPlayerSetTime(_:_:)](audiotoolbox/musicplayersettime(_:_:).md)
- [MusicPlayerStart(_:)](audiotoolbox/musicplayerstart(_:).md)
- [MusicPlayerStop(_:)](audiotoolbox/musicplayerstop(_:).md)
- [MusicPlayer](audiotoolbox/musicplayer.md)
- [MusicTimeStamp](audiotoolbox/musictimestamp.md)