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.
new MediaStreamTrackAudioSourceNode(context, options)
A new MediaStreamTrackAudioSourceNode
object representing the audio node whose media is obtained from the specified media track.
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!');
}