setPlaybackRate

setPlaybackRate(id: string, rate: number, skipDispatchEvent?: boolean): void;

Set the playback speed of a sound. A rate of 1 is normal speed; 0.5 is half speed; 2 is double speed. Pitch changes along with the rate (Web Audio API behaviour).

Parameter	Type	Description
`id`	`string`	ID of the sound
`rate`	`number`	Playback speed multiplier (e.g. `0.5`, `1`, `2`)
`skipDispatchEvent`	`boolean` (optional)	When `true`, skips dispatching the rate change event

tip

You can also set the initial rate at play time via PlayOptions.playbackRate.

Example

await soundManager.loadSounds([{ id: 'intro', url: 'intro.mp3' }]);

soundManager.play('intro');

// Half speed
soundManager.setPlaybackRate('intro', 0.5);

// Double speed
soundManager.setPlaybackRate('intro', 2);

// Back to normal
soundManager.setPlaybackRate('intro', 1);

⚡ Playback Rate1× (normal)

0.25×1× (normal)2×

Try it: Play the intro speech and drag the slider to hear the rate change in real time. Note that pitch shifts along with speed — this is native Web Audio API behaviour.

Example​

Example