ADSR Envelope — Iris Lab

Attack, Decay, Sustain, Release — the four parameters that shape how a synthesizer note evolves over time. Drag the envelope handles or use sliders.

Envelope Editor — drag handles

A D S R

Output Waveform

Parameters

Attack: 50 ms Decay: 200 ms Sustain: 70% Release: 500 ms Oscillator waveform

Note duration (hold): 800 ms

Attack: time to peak from silence
Decay: fall from peak to sustain level
Sustain: held level while key is pressed
Release: fade to silence after key release

Piano — click any key