User`s Manual - Rack Extension

3.2.9. Amplitude Envelope

The amplitude envelope works just like the filter envelope, but controls the volume of the sound, rather than its timbre (see fig. 3.2.9).

Attack

The Attack knob sets the duration it takes for the envelope to reach its maximum value.

Most sounds use a setting near the minimum in order to create a snappy attack.

Decay

Level

Attack Decay

Key pressed

Sustain

Release

Key released

Fig. 3.2.9. The amplitude envelope

Time

After reaching the peak, the decay stage commences. During the decay stage, the envelope falls back to a lower level, the sustain level. The Decay parameter specifies the duration of the decay stage, i.e. how long it takes to fall back to the sustain level.

Sustain

This parameter specifies the sustain level that is reached after the decay stage ends. The sustain stage lasts as long as a key is depressed.

Release

The release stage is triggered whenever a key is released. The release parameter specifies the duration it takes the envelope to hit zero. Note that when the sustain level is set to zero, the release parameter may have no effect if the envelope has previously reached zero already.

The Legend User’s Manual - 17