MediaStreamAudioSourceNode: mediaStream property

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since April 2021.

The MediaStreamAudioSourceNode interface's read-only mediaStream property indicates the MediaStream that contains the audio track from which the node is receiving audio.

This stream was specified when the node was first created, either using the MediaStreamAudioSourceNode() constructor or the AudioContext.createMediaStreamSource() method.

Value

A MediaStream representing the stream which contains the MediaStreamTrack serving as the source of audio for the node.

The user agent uses the first audio track it finds on the specified stream as the audio source for this node. However, there is no way to be certain which track that will be on multi-track streams. If the specific track matters to you, or you need to have access to the track itself, you should use a MediaStreamTrackAudioSourceNode instead.

Examples

js
const audioCtx = new window.AudioContext();
let options = {
  mediaStream: stream,
};

let source = new MediaStreamAudioSourceNode(audioCtx, options);
console.log(source.mediaStream);

Specifications

Specification
Web Audio API
# dom-mediastreamaudiosourcenode-mediastream

Browser compatibility

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
mediaStream

Legend

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Full support
Full support