User Manual

MODULATION

Iris 2 | ENVELOPES Page 56

Attack controls the speed at which the gain is turned up from silence to full volume. The

default setting is an instantaneous 0 milliseconds. Setting the attack to 500 ms would

cause the gain to ramp up to full volume over half a second (500 ms).

Decay controls the speed at which the gain falls back down to the Sustain level. This value

is in milliseconds.

Sustain controls the value that will continue for the remaining duration of the note that

triggered this envelope.

Release is triggered by the end of a sequencer note. Release controls the speed at which

the gain is turned back down to silence. A shorter value of Release time will cause the

sound to silence faster. A longer Release time will give the sound a “tail” of sound that

takes some time to fade away. Long Release times mixed with many notes played in quick

succession will cause the Iris create many overlapping voices. This can cause Iris’s CPU

usage to jump up due to all the voices sounding at once.

Envelope Curves

The Attack, Decay, and Release parameters each have an additional control that sets the

shape of its segment of the envelope. By clicking and dragging up or down on the curved

line segments that go between the Attack, Decay, and Sustain nodes of the envelope

display, you will curve the line up or down. These curves can give your modulated sound

more “snap” on the attack and decay or a more gentle release tail.