IIRFilterNode()
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 |
|---|
| Web Audio API # dom-iirfilternode-constructor-iirfilternode |
Browser compatibility
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