AnalyserNode: AnalyserNode() constructor
The AnalyserNode()
constructor of the Web Audio API creates a new AnalyserNode
object instance.
Syntax
js
new AnalyserNode(context)
new AnalyserNode(context, options)
Parameters
context
-
A reference to an
AudioContext
orOfflineAudioContext
. options
Optional-
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 ofchannelCountMode
. 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"
. (SeeAudioNode.channelCountMode
for more information including default values.)
Specifications
Specification |
---|
Web Audio API # dom-analysernode-analysernode |
Browser compatibility
BCD tables only load in the browser
See also
BaseAudioContext.createAnalyser()
, the equivalent factory method