Erica Synths LXR Eurorack Drum Module (28 HP) - Manual (Page 26)

Peak
The peak filter amplifies frequencies around the filter frequency, but lets the other frequencies pass
nearly unaltered. The resonance controls the amount of amplification.
LP2 Type
This type is a special case. It replaces the SVF model with a simpler implementation of the SVF
topology with much more digital resonance. Use it for those screaming acid sounds!
6.3. Envelopes
Envelopes are used to generate a varying control signal that can control other synthesis parameters.
Whenever a voice is triggered, the envelope is restarted. The signal rises with the speed selected by
the attack setting until it reaches the maximum amplitude. Then it will fall back down to zero, with
the speed set by the decay parameter.
LXR Owners Manual - 26 -