Web/API/BaseAudioContext/createStereoPanner

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

A StereoPannerNode.

Example

In our [[../../../../../../../mdn.github.io/webaudio-examples/stereo-panner-node/index|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 APIThe definition of 'createStereoPanner()' in that specification.	Working Draft

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`createStereoPanner`	Chrome Full support 42	Edge Full support ≤18	Firefox Full support 53 Notes' Full support 53 Notes' Notes' Originally implemented on `AudioContext` in Firefox 37.	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 Notes' Full support 53 Notes' Notes' Originally implemented on `AudioContext` in Firefox Android 37.	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.