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
Options are as follows:
  • 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' in that specification.
Working Draft Initial definition.

Browser CompatibilityUpdate compatibility data on GitHub

Chrome Edge Firefox Internet Explorer Opera Safari
Basic support 55 ? 53 No 42 ?
Android webview Chrome for Android Edge Mobile Firefox for Android Opera for Android iOS Safari Samsung Internet
Basic support 55 55 ? 53 42 ? 6.0

See also

© 2005–2018 Mozilla Developer Network and individual contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.