12.25

DR. OCTO REX LOOP PLAYER714
Envelope section
Envelope generators are used to control several important sound parameters in analog synthesizers, such as pitch,
volume, filter frequency etc. In a conventional synthesizer, envelopes govern how these parameters should respond
over time - from the moment a note is struck to the moment it is released. In the Dr. Octo Rex device however, the en-
velopes are triggered each time a slice is played back.
There are two envelope generators in the Dr. Octo Rex, one for volume, and one for the filter frequency (and/or
pitch). Both have the standard four parameters; Attack, Decay, Sustain and Release
! Please refer to “Envelopes - General” in the Subtractor chapter for a description of the basic envelope param-
eters.
Amplitude Envelope
The Amp Envelope governs how the volume of each slice should change over time, from the time it is triggered (the
slice note starts) until the slice note ends. This can be used to make a loop more distinct (by having a snappy attack
and a short decay time) or more spaced-out (by raising the attack time).
Filter Envelope
The Filter Envelope can be used to control two parameters for all REX loops in the 8 Loop Slots; filter frequency and
overall loop pitch. By setting up a filter envelope you control how the filter frequency and/or the pitch should change
over time for each slice.
The Amount parameter determines to what degree the filter frequency will be affected by the Filter Envelope. The
higher the Amount setting, the more pronounced the effect of the envelope on the filter.
q Try lowering the Frequency slider and raising Resonance and Envelope Amount to get the most effect of the
filter envelope!