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    AudioContext.createBiquadFilter()

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    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

    A BiquadFilterNode.

    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 Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
    Basic support 10.0webkit 25.0 (25.0)  Not supported 15.0 webkit
    22    		 6.0webkit
    Feature Android Firefox Mobile (Gecko) Firefox OS IE Mobile Opera Mobile Safari Mobile Chrome for Android
    Basic support ? 26.0 1.2 ? ? ? 33.0

    See also

    Schlagwörter des Dokuments und Mitwirkende

    Schlagwörter: 
     Mitwirkende an dieser Seite: Jeremie, teoli, chrisdavidmills
     Zuletzt aktualisiert von: Jeremie,