ADSR Envelope Calibration

To calibrate attack, you set the decay, sustain and release to zero, press a key on the keyboard (keep it pressed) and measure how long it takes for the note to go from zero to the maximum amplitude (it will drop to zero after the maximum is reached since there's no sustain).

To calibrate decay, you set the attack, sustain and release to zero, press a key (keep it pressed) and measure how long it takes for the note to go from its maximum amplitude to zero.

To calibrate sustain, well, you have nothing to do since sustain is a percentage of the maximum setting.

To calibrate release, you set the attack and decay to zero, you set the sustain to 100%, press a key (and release immediately) and measure how long it takes for the note to go from its maximum amplitude to zero.


Well, here are the calibrated knobs! Notice that the decay and release times appear to be the same.