BaseAudioContext.createIIRFilter()

The createIIRFilter() method of the BaseAudioContext 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 feedforward coefficients are 0, and/or the first feedback coefficient 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

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidiOS SafariSamsung Internet
Basic supportChrome Full support 49Edge Full support YesFirefox Full support 50IE ? Opera ? Safari ? WebView Android Full support 49Chrome Android Full support 49Edge Mobile Full support YesFirefox Android Full support 50Opera Android ? Safari iOS ? Samsung Internet Android ?

Legend

Full support  
Full support
Compatibility unknown  
Compatibility unknown

See also

Document Tags and Contributors

Last updated by: fscholz,