PeriodicWave

The PeriodicWave interface defines a periodic waveform that can be used to shape the output of an OscillatorNode.

Press play, then pick a preset or shape the wave yourself: each slider sets the sine term of one harmonic, a multiple of the oscillator frequency. The upper plot shows the shape of the wave as the harmonics add up, before you play it; the lower one shows the live output.

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Constructor

constructor(context: BaseAudioContext, options?: PeriodicWaveOptions)

PeriodicWaveOptions

Parameter	Type	Default	Description
real Optional	Float32Array	-	Cosine terms.
imag Optional	Float32Array	-	Sine terms.
disableNormalization Optional	boolean	false	When true, disables normalization of the periodic wave.

You can also create a PeriodicWave via the BaseAudioContext.createPeriodicWave(real, imag, constraints?: PeriodicWaveConstraints) factory method.

Properties

PeriodicWave neither owns nor inherits any properties.

Methods

PeriodicWave neither owns nor inherits any methods.

Remarks

real and imag

• If only one is specified, the other one is treated as an array of 0.0 values of the same length.
• If neither is given, values are equivalent to the default 'sine' waveform.
• If both are given, they must have the same length.
• See the Web Audio spec for how values correspond to the output wave.