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The createIIRFilter() method of the AudioContext interface creates an IIRFilterNode, which represents a general infinite impulse response (IIR) filter which can be configured to serve as various types of filter.
Syntax
var iirFilter = AudioContext.createIIRFilter(feedforward, feedback);
Parameters
feedforward- An array of floating-point values specifying the feedforward (numerator) coefficients for the transfer function of the IIR filter. The maximum length of this array is 20, and at least one value must be nonzero.
feedback- An array of floating-point values specifying the feedback (denominator) coefficients for the transfer function of the IIR filter. This array may have up to 20 members, the first of which must not be zero.
Return value
An IIRFilterNode implementing the filter with the specified feedback and feedforward coefficient arrays.
Exceptions
InvalidStateError- All of the
feedforwardcoefficients are 0, and/or the firstfeedbackcoefficient is 0. NotSupportedError- One or both of the input arrays exceeds 20 members.
Specifications
| Specification | Status | Comment |
|---|---|---|
| Web Audio API The definition of 'createIIRFilter()' in that specification. |
Working Draft |
Browser compatibility
| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
|---|---|---|---|---|---|
| Basic support | 49.0 | 50 (50) | ? | ? | ? |
| Feature | Android | Android Webview | Firefox Mobile (Gecko) | Firefox OS | IE Mobile | Opera Mobile | Safari Mobile | Chrome for Android |
|---|---|---|---|---|---|---|---|---|
| Basic support | No support | 49.0 | 50.0 (50) | ? | ? | ? | ? | 49.0 |