The createStereoPanner()
method of the BaseAudioContext
interface creates a StereoPannerNode
, which can be used to apply stereo panning to an audio source. It positions an incoming audio stream in a stereo image using a low-cost equal-power panning algorithm.
Syntax
baseAudioContext.createStereoPanner();
Returns
Example
In our StereoPannerNode example (see source code) HTML we have a simple <audio>
element along with a slider <input>
to increase and decrease pan value. In the JavaScript we create a MediaElementAudioSourceNode
and a StereoPannerNode
, and connect the two together using the connect()
method. We then use an oninput
event handler to change the value of the StereoPannerNode.pan
parameter and update the pan value display when the slider is moved.
Moving the slider left and right while the music is playing pans the music across to the left and right speakers of the output, respectively.
var audioCtx = new (window.AudioContext || window.webkitAudioContext)(); var myAudio = document.querySelector('audio'); var panControl = document.querySelector('.panning-control'); var panValue = document.querySelector('.panning-value'); pre.innerHTML = myScript.innerHTML; // Create a MediaElementAudioSourceNode // Feed the HTMLMediaElement into it var source = audioCtx.createMediaElementSource(myAudio); // Create a stereo panner var panNode = audioCtx.createStereoPanner(); // Event handler function to increase panning to the right and left // when the slider is moved panControl.oninput = function() { panNode.pan.setValueAtTime(panControl.value, audioCtx.currentTime); panValue.innerHTML = panControl.value; } // connect the MediaElementAudioSourceNode to the panNode // and the panNode to the destination, so we can play the // music and adjust the panning using the controls source.connect(panNode); panNode.connect(audioCtx.destination);
Specifications
Specification | Status | Comment |
---|---|---|
Web Audio API The definition of 'createStereoPanner()' in that specification. |
Working Draft |
Browser compatibility
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
createStereoPanner | Chrome Full support 42 | Edge Full support ≤18 | Firefox
Full support
53
| IE No support No | Opera No support No | Safari No support No | WebView Android Full support Yes | Chrome Android Full support Yes | Firefox Android
Full support
53
| Opera Android No support No | Safari iOS No support No | Samsung Internet Android Full support Yes |
Legend
- Full support
- Full support
- No support
- No support
- See implementation notes.
- See implementation notes.