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ScaledEnvelop is an envelope which can be scaled to any range

summary (oneliner)



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Audio In (Object)

Attack (Number)

The attack time is the amount of time it takes for the envelope to reach it's maximum value

Decay (Number)

After the attack portion of the envelope, the value will fall over the duration of the decay time to it's sustain value

Sustain (Number)

The sustain value is the value which the envelope rests at after triggerAttack is called, but before triggerRelease is invoked

Release (Number)

After triggerRelease is called, the envelope's value will fall to it's miminum value over the duration of the release time

Attack Curve (Number)

Release Curve (Number)

The shape of the release

Min (Number)

The envelope's min output value. This is the value which it starts at and where it will end

Max (Number)

The envelope's max output value. In other words, the value at the peak of the attack portion of the envelope

Exponent (Number)

The envelope's exponent value


Audio Out (Object)

ScaledEnvelope on Oscillator Frequency Example:

A «ScaledEnvelope»-op is connected to the «Frequency»-port of an «Oscillator». On click the «Trigger Attack / Release»-port of the Envelope is triggered which changes the frequency of the Oscillator. It is important to set the «Min» and «Max» of the ScaledEnvelope right, in this case «Min» is set to a «10» – a very low frequency which cannot be heard, and «Max» is set to «400». When the envelope reached the «Release»-portion of the ADSR-envelope, the signal will remain the «Min»-signal, in this case the Oscillator will oscillate at 10Hz.


  • Uses library: Tone.js (Webaudio Library)

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Examples using ScaledEnvelope

Public Patches using ScaledEnvelope