The IIRFilterNode()
constructor of the Web Audio API creates a new IIRFilterNode
object which an AudioNode
processor which implements a general infinite impulse response filter.
Syntax
var iIRFilterNode = new IIRFilterNode(context, options)
Parameters
Inherits parameters from the AudioNodeOptions
dictionary.
- context
- A reference to an
AudioContext
. - options
- Options are as follows:
feedforward
: A sequence of feedforward coefficients.feedback
: A sequence of feedback coefficients.
Unlike other nodes in the Web Audio API, the options passed into the IIR filter upon creation are not optional. The filter needs these values to work and with the vast range of filters available, there is no default.
Return value
A new IIRFilterNode
object instance.
Examples
let feedForward = [0.00020298, 0.0004059599, 0.00020298]; let feedBackward = [1.0126964558, -1.9991880801, 0.9873035442]; const AudioContext = window.AudioContext || window.webkitAudioContext; const audioCtx = new AudioContext(); const iirFilter = new IIRFilterNode(audioCtx, { feedforward: feedForward, feedback: feedBackward });
Specifications
Specification | Status | Comment |
---|---|---|
Web Audio API The definition of 'IIRFilterNode()' in that specification. |
Working Draft | Initial definition. |
Browser Compatibility
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
IIRFilterNode() constructor | Chrome
Full support
55
| Edge Full support ≤79 | Firefox Full support 53 | IE No support No | Opera Full support 42 | Safari ? | WebView Android
Full support
55
| Chrome Android
Full support
55
| Firefox Android Full support 53 | Opera Android Full support 42 | Safari iOS ? | Samsung Internet Android
Full support
6.0
|
Legend
- Full support
- Full support
- No support
- No support
- Compatibility unknown
- Compatibility unknown
- See implementation notes.
- See implementation notes.