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


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


Inherits parameters from the AudioNodeOptions dictionary.

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.


Specification Status Comment
Web Audio API
The definition of 'AnalyserNode() constructor' in that specification.
Working Draft Initial definition.

Browser Compatibility

ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
AnalyserNode() constructorChrome Full support 55Edge Full support ≤79Firefox Full support 53IE No support NoOpera Full support 42Safari Full support 6WebView Android Full support 55Chrome Android Full support 55Firefox Android Full support 53Opera Android Full support 42Safari iOS Full support 6Samsung Internet Android Full support 6.0


Full support
Full support
No support
No support

See also