AnalyserNode: AnalyserNode() constructor

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since April 2021.

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

new AnalyserNode(context)
new AnalyserNode(context, options)

An object with the following properties, all 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.
channelCount: Represents an integer used to determine how many channels are used when up-mixing and down-mixing connections to any inputs to the node. (See AudioNode.channelCount for more information.) Its usage and precise definition depend on the value of channelCountMode.
channelCountMode: Represents an enumerated value describing the way channels must be matched between the node's inputs and outputs. (See AudioNode.channelCountMode for more information including default values.)
channelInterpretation: Represents an enumerated value describing the meaning of the channels. This interpretation will define how audio up-mixing and down-mixing will happen. The possible values are "speakers" or "discrete". (See AudioNode.channelCountMode for more information including default values.)

Specification
Web Audio API # dom-analysernode-analysernode

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