PeriodicWave: PeriodicWave() 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 PeriodicWave()
constructor of the Web Audio API creates a new
PeriodicWave
object instance.
Syntax
new PeriodicWave(context)
new PeriodicWave(context, options)
Parameters
context
-
A
BaseAudioContext
representing the audio context you want the node to be associated with. options
Optional-
A
PeriodicWaveOptions
dictionary object defining the properties you want thePeriodicWave
to have (It also inherits the options defined in the PeriodicWaveConstraints dictionary.):real
-
A
Float32Array
containing the cosine terms that you want to use to form the wave (equivalent to thereal
parameter ofBaseAudioContext.createPeriodicWave
). imag
-
A
Float32Array
containing the sine terms that you want to use to form the wave (equivalent to theimag
parameter ofBaseAudioContext.createPeriodicWave
). 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.)
Return value
A new PeriodicWave
object instance.
Examples
const real = new Float32Array(2);
const imag = new Float32Array(2);
const ac = new AudioContext();
real[0] = 0;
imag[0] = 0;
real[1] = 1;
imag[1] = 0;
const wave = new PeriodicWave(ac, {
real,
imag,
disableNormalization: false,
});
Specifications
Specification |
---|
Web Audio API # dom-periodicwave-periodicwave |
Browser compatibility
BCD tables only load in the browser