MediaStreamTrackAudioSourceNode()
The Web Audio API's MediaStreamTrackAudioSourceNode()
constructor creates and returns a new MediaStreamTrackAudioSourceNode
object whose audio is taken from the MediaStreamTrack
specified in the given options object.
Another way to create a MediaStreamTrackAudioSourceNode
is to call theAudioContext.createMediaStreamTrackSource()
method, specifying the MediaStreamTrack
from which you want to obtain audio.
Syntax
audioTrackNode = new MediaStreamTrackAudioSourceNode(context, options);
Parameters
context
-
An
AudioContext
representing the audio context you want the node to be associated with. options
-
A
MediaStreamTrackAudioSourceOptions
object defining the properties you want theMediaStreamTrackAudioSourceNode
to have:mediaStreamTrack
-
The
MediaStreamTrack
from which to take audio data for this node's output.
Return value
A new MediaStreamTrackAudioSourceNode
object representing the audio node whose media is obtained from the specified media track.
Exceptions
-
NotSupportedError
DOMException
-
Thrown if the specified
context
is not anAudioContext
. -
InvalidStateError
DOMException
-
Thrown if the specified
MediaStreamTrack
isn't an audio track (that is, itskind
property isn'taudio
.
Example
This example uses getUserMedia()
to obtain access to the user's camera, then creates a new MediaStreamAudioSourceNode
from the first audio track provided by the device.
let audioCtx = new (window.AudioContext || window.webkitAudioContext)(); if (navigator.mediaDevices.getUserMedia) { navigator.mediaDevices.getUserMedia ( { audio: true, video: false }).then(function(stream) { let options = { mediaStreamTrack: stream.getAudioTracks()[0]; } let source = new MediaStreamTrackAudioSourceNode(audioCtx, options); source.connect(audioCtx.destination); }).catch(function(err) { console.log('The following gUM error occurred: ' + err); }); } else { console.log('new getUserMedia not supported on your browser!'); }
Specifications
Browser compatibility
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
MediaStreamTrackAudioSourceNode |
No |
No |
68
Firefox 68 implements the updated standard's definition of the "first" audio track; now the first track is the one whose ID comes first lexicographically.
|
No |
No |
No |
No |
No |
68
Firefox 68 implements the updated standard's definition of the "first" audio track; now the first track is the one whose ID comes first lexicographically.
|
No |
No |
No |
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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/MediaStreamTrackAudioSourceNode/MediaStreamTrackAudioSourceNode