User Manual

DR. OCTO REX LOOP PLAYER
(RECORD+REASON)
712
Resonance
The filter resonance parameter affects the character of the filter sound. For lowpass filters, raising the resonance will
emphasize the frequencies around the set filter frequency. This produces a generally thinner sound, but with a
sharper, more pronounced filter frequency “sweep”. The higher the resonance value, the more resonant the sound be-
comes until it produces a whistling or ringing sound. If you set a high value for the resonance parameter and then vary
the filter frequency, this will produce a very distinct sweep, with the ringing sound being very evident at certain fre-
quencies.
• For the highpass filter, the resonance parameter operates just like for the lowpass filters.
• When you use the Bandpass or Notch filter, the resonance setting adjusts the width of the band.
When you raise the resonance, the band where frequencies are let through (Bandpass), or cut (Notch) will become
narrower. Generally, the Notch filter produces more musical results using low resonance settings.
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).