Web/API/MediaStream/getAudioTracks

The getAudioTracks() method of the MediaStream interface returns a sequence that represents all the MediaStreamTrack objects in this stream's track set where MediaStreamTrack.kind is audio.

Syntax

var mediaStreamTracks = mediaStream.getAudioTracks()

Parameters

None.

Return value

An array of MediaStreamTrack objects, one for each audio track contained in the stream. Audio tracks are those tracks whose kind property is audio. The array is empty if the stream contains no audio tracks.

Note: The order of the returned tracks is not defined by the specification and may, in fact, change from one call to getAudioTracks() to the next.

Early versions of this API included a special AudioStreamTrack interface which was used as the type for each entry in the list of audio streams; however, this has since been merged into the main MediaStreamTrack interface.

Example

This example gets a webcam's audio and video in a stream using getUserMedia(), attaches the stream to a <video> element, then sets a timer that, upon expiring, will stop the first audio track found on the stream.

navigator.mediaDevices.getUserMedia({audio: true, video: true})
.then(mediaStream => {
  document.querySelector('video').srcObject = mediaStream;
  // Stop the audio stream after 5 seconds
  setTimeout(() => {
    const tracks = mediaStream.getAudioTracks()
    tracks[0].stop()
  }, 5000)
})

Specifications

Specification	Status	Comment
Media Capture and StreamsThe definition of 'getAudioTracks()' in that specification.	Candidate Recommendation	Initial definition.

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`getAudioTracks`	Chrome Full support 26	Edge Full support 12	Firefox Full support 22 Notes' Full support 22 Notes' Notes' Prior to Firefox 64, this method returned an array of `AudioStreamTrack` objects. However, `MediaStreamTrack` has now subsumed that interface's functionality.	IE No support No	Opera Full support Yes	Safari Full support Yes	WebView Android Full support 37	Chrome Android Full support 26	Firefox Android Full support 22 Notes' Full support 22 Notes' Notes' Prior to Firefox 64, this method returned an array of `AudioStreamTrack` objects. However, `MediaStreamTrack` has now subsumed that interface's functionality.	Opera Android No support No	Safari iOS Full support Yes	Samsung Internet Android Full support 1.5

Legend

Full support: Full support
No support: No support
See implementation notes.': See implementation notes.

MediaStream.getAudioTracks() by Mozilla Contributors is licensed under CC-BY-SA 2.5.