The muted read-only property of the MediaStreamTrack interface returns a Boolean value indicating whether or not the track is currently unable to provide media output.

To implement a way for users to mute and unmute a track, use the enabled property. When a track is disabled by setting enabled to false, it generates only empty frames (audio frames in which every sample is 0, or video frames in which every pixel is black).


mutedFlag = MediaStreamTrack.muted;


A Boolean which is true if the track is currently muted, or false if the track is currently unmuted.

When possible, avoid polling muted to monitor the track's muting status. Instead, add event listeners for the mute and unmute events.


This example counts the number of tracks in an array of MediaStreamTrack objects which are currently muted.

var mutedCount = 0;

trackList.forEach(function(track) {
  if (track.muted) {
    mutedCount += 1;


Specification Status Comment
Media Capture and Streams
The definition of 'muted' in that specification.
Candidate Recommendation Initial definition.

Browser compatibilityUpdate compatibility data on GitHub

Chrome Edge Firefox Internet Explorer Opera Safari
Basic support Yes 12 59 No Yes ?
Android webview Chrome for Android Edge Mobile Firefox for Android Opera for Android iOS Safari Samsung Internet
Basic support Yes Yes Yes 59 ? ? Yes

© 2005–2018 Mozilla Developer Network and individual contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.