exponentialRampToValueAtTime

Summary

Schedules an exponential continuous change in parameter value from the previous scheduled parameter value to the given value. Parameters representing filter frequencies and playback rate are best changed exponentially because of the way humans perceive sound.

Method of apis/webaudio/AudioParamapis/webaudio/AudioParam

Syntax

var  = AudioParam.exponentialRampToValueAtTime(value, endTime);

Parameters

value

Data-type

Number

The value the parameter will exponentially ramp to at the given time. An exception will be thrown if this value is less than or equal to 0, or if the value at the time of the previous event is less than or equal to 0.

endTime

Data-type

Number

The time in the same time coordinate system as AudioContext.currentTime.

Return Value

Returns an object of type

Examples

var gainNode = audioCtx.createGain();
gainNode.gain.exponentialRampToValueAtTime(1.0, audioCtx.currentTime + 2); //'gain' is the AudioParam

Related specifications

W3C Web Audio API

W3C Editor’s Draft