The createBiquadFilter()
method of the AudioContext
interface creates a BiquadFilterNode
, which represents a second order filter configurable as several different common filter types.
Syntax
var audioCtx = new AudioContext(); var biquadFilter = audioCtx.createBiquadFilter();
Returns
Example
The following example shows basic usage of an AudioContext to create a Biquad filter node. For a complete working example, check out our voice-change-o-matic demo (look at the source code too).
var audioCtx = new (window.AudioContext || window.webkitAudioContext)(); //set up the different audio nodes we will use for the app var analyser = audioCtx.createAnalyser(); var distortion = audioCtx.createWaveShaper(); var gainNode = audioCtx.createGain(); var biquadFilter = audioCtx.createBiquadFilter(); var convolver = audioCtx.createConvolver(); // connect the nodes together source = audioCtx.createMediaStreamSource(stream); source.connect(analyser); analyser.connect(distortion); distortion.connect(biquadFilter); biquadFilter.connect(convolver); convolver.connect(gainNode); gainNode.connect(audioCtx.destination); // Manipulate the Biquad filter biquadFilter.type = "lowshelf"; biquadFilter.frequency.value = 1000; biquadFilter.gain.value = 25;
Specifications
Specification | Status | Comment |
---|---|---|
Web Audio API The definition of 'createBiquadFilter()' in that specification. |
Working Draft |
Browser compatibility
Feature | Chrome | Edge | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
---|---|---|---|---|---|---|
Basic support | 10.0webkit | (Yes) | 25.0 (25.0) | No support | 15.0 webkit 22 |
6.0webkit |
Feature | Android | Edge | Firefox Mobile (Gecko) | Firefox OS | IE Mobile | Opera Mobile | Safari Mobile | Chrome for Android |
---|---|---|---|---|---|---|---|---|
Basic support | ? | (Yes) | 26.0 | 1.2 | ? | ? | ? | 33.0 |