IIRFilterNode.getFrequencyResponse()
The getFrequencyResponse()
method of the IIRFilterNode
interface takes the current filtering algorithm's settings and calculates the frequency response for frequencies specified in the frequencyHz
array of frequencies.
The results are stored in two preexisting output arrays:
magResponse
receiving the linear magnitudephaseResponse
receiving the phase response in radians.
Syntax
JavaScript
Copy Code
var audioCtx = new AudioContext(); var iirFilter = audioCtx.createIIRFilter(); iirFilter.getFrequencyResponse(myFrequencyArray,magResponseOutput,phaseResponseOutput);
Returns
None.
Parameters
getFrequencyResponse()
takes as parameters three Float32Array
s:
- frequencyHz
- An array containing hertz values that you want the frequency response for.
- magResponse
- An array that will contain the outputted magnitude of the frequency response for each inputted frequency (hertz) value. The magnitude values are unitless.
- phaseResponse
- An array that will contain the outputted phase of the frequency response for each inputted frequency (hertz) value, measured in radians.
Specifications
Specification | Status | Comment |
---|---|---|
Web Audio API The definition of 'getFrequencyResponse()' in that specification. |
Working Draft |
Browser compatibility
Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
---|---|---|---|---|---|
Basic support | 49.0 | ? | ? | ? | ? |
Feature | Android | Android Webview | Firefox Mobile (Gecko) | Firefox OS | IE Mobile | Opera Mobile | Safari Mobile | Chrome for Android |
---|---|---|---|---|---|---|---|---|
Basic support | No support | 49.0 | ? | ? | ? | ? | ? | 49.0 |
See also
License
© 2016 Mozilla Contributors
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-us/docs/web/api/iirfilternode/getfrequencyresponse()