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AudioParam

There are two kinds of AudioParam, a-rate and k-rate parameters:
API AudioParam Reference Web Audio API

AudioParam.setValueCurveAtTime()

A reference to this AudioParam object. In some browsers older implementations of this interface return void.
API Audio AudioParam Method Reference setValueCurveAtTime Web

AudioParam.cancelScheduledValues()

A reference to this AudioParam object. In some browsers older implementations of this interface return void.
API AudioParam cancelScheduledValues Method Reference Web Audio API

AudioParam.exponentialRampToValueAtTime()

A reference to this AudioParam object. In some browsers older implementations of this interface return void.
API AudioParam exponentialRampToValueAtTime Method Reference Web Audio API

AudioParam.setTargetAtTime()

The change starts at the time specified in startTime and exponentially moves towards the value given by the target parameter. The exponential decay rate is defined by the timeConstant parameter. This is the time it takes a first-order linear continuous time-invariant system to reach the value 1 - 1/e (around 63.2%) given a step input response (transition from 0 to 1 value): basically, the larger it is, the slower the transition will be.  This is useful for decay or release portions of envelopes.
API AudioParam Method Reference setTargetAtTime Web Audio API

AudioParam.setValueAtTime()

A reference to this AudioParam object. In some browsers older implementations of this interface return void.
API AudioParam Method Reference setValueAtTime Web Audio API

AudioParam.value

 Though value can be set, any modifications happening while there are automation events scheduled — that is, events scheduled using the methods of the AudioParam — are ignored, without raising any exception.
API AudioParam Property Reference Référence value Web Audio API