Web/API/AnalyserNode/AnalyserNode

The AnalyserNode constructor of the Web Audio API creates a new AnalyserNode object instance.

Syntax

var analyserNode = new AnalyserNode(context, ?options);

Parameters

Inherits parameters from the AudioNodeOptions dictionary.

context

A reference to an AudioContext or OfflineAudioContext.

options Optional

 

fftSize

• The desired initial size of the FFT for frequency-domain analysis.  The default is 2048.
• maxDecibels: The desired initial maximum power in dB for FFT analysis. The default is -30.
• minDecibels: The desired initial minimum power in dB for FFT analysis. The default is -100.
• smoothingTimeConstant: The desired initial smoothing constant for the FFT analysis. The default is 0.8.

Return value

A new AnalyserNode object instance.

Specifications

Specification	Status	Comment
Web Audio APIThe definition of 'AnalyserNode() constructor' 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.

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
AnalyserNode() constructor	Chrome Full support 55	Edge Full support 79	Firefox Full support 53	IE No support No	Opera Full support 42	Safari No support No	WebView Android Full support 55	Chrome Android Full support 55	Firefox Android Full support 53	Opera Android Full support 42	Safari iOS No support No	Samsung Internet Android Full support 6.0

Legend

Full support  

Full support

No support  

No support

See also

• BaseAudioContext.createAnalyser(), the equivalent factory method

AnalyserNode.AnalyserNode() by Mozilla Contributors is licensed under CC-BY-SA 2.5.