class AnalyserNode

package js.html.audio

extends AudioNode › EventTarget

Available on HTML5

The AnalyserNode interface represents a node able to provide real-time frequency and time-domain analysis information. It is an AudioNode that passes the audio stream unchanged from the input to the output, but allows you to take the generated data, process it, and create audio visualizations.

Documentation AnalyserNode by Mozilla Contributors, licensed under CC-BY-SA 2.5.

See:

https://developer.mozilla.org/en-US/docs/Web/API/AnalyserNode

Variables

fftSize:Int

Is an unsigned long value representing the size of the FFT (Fast Fourier Transform) to be used to determine the frequency domain.

read onlyfrequencyBinCount:Int

Is an unsigned long value half that of the FFT size. This generally equates to the number of data values you will have to play with for the visualization.

maxDecibels:Float

Is a double value representing the maximum power value in the scaling range for the FFT analysis data, for conversion to unsigned byte values — basically, this specifies the maximum value for the range of results when using getByteFrequencyData().

minDecibels:Float

Is a double value representing the minimum power value in the scaling range for the FFT analysis data, for conversion to unsigned byte values — basically, this specifies the minimum value for the range of results when using getByteFrequencyData().

smoothingTimeConstant:Float

Is a double value representing the averaging constant with the last analysis frame — basically, it makes the transition between values over time smoother.

Methods

getByteFrequencyData (array:Uint8Array):Void

Copies the current frequency data into a Uint8Array (unsigned byte array) passed into it.

getByteTimeDomainData (array:Uint8Array):Void

Copies the current waveform, or time-domain, data into a Uint8Array (unsigned byte array) passed into it.

getFloatFrequencyData (array:Float32Array):Void

Copies the current frequency data into a Float32Array array passed into it.

getFloatTimeDomainData (array:Float32Array):Void

Copies the current waveform, or time-domain, data into a Float32Array array passed into it.

Inherited Variables

Defined by AudioNode

channelCount:Int

Represents an integer used to determine how many channels are used when up-mixing and down-mixing connections to any inputs to the node. Its usage and precise definition depend on the value of AudioNode.channelCountMode.

channelCountMode:ChannelCountMode

Represents an enumerated value describing the way channels must be matched between the node's inputs and outputs.

channelInterpretation: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".

read onlycontext:AudioContext

Returns the associated AudioContext, that is the object representing the processing graph the node is participating in.

read onlynumberOfInputs:Int

Returns the number of inputs feeding the node. Source nodes are defined as nodes having a numberOfInputs property with a value of 0.

read onlynumberOfOutputs:Int

Returns the number of outputs coming out of the node. Destination nodes — like AudioDestinationNode — have a value of 0 for this attribute.

Inherited Methods

Defined by AudioNode

connect (destination:AudioParam, output:Int = 0):Void

connect (destination:AudioNode, output:Int = 0, input:Int = 0):AudioNode

Throws:

null

DOMError

disconnect (output:Int = 0):Void

Throws:

null

DOMError

Defined by EventTarget

addEventListener (type:String, listener:Function, capture:Bool = false):Void

addEventListener (type:String, listener:EventListener, capture:Bool = false, ?wantsUntrusted:Bool):Void

Throws:

null

DOMError

dispatchEvent (event:Event):Bool

Throws:

null

DOMError

removeEventListener (type:String, listener:Function, capture:Bool = false):Void

removeEventListener (type:String, listener:EventListener, capture:Bool = false):Void

Throws:

null

DOMError