OCTA FILTER
A funkier version of the previous circuit: Oct 2 is bypassed and
now sets an envelope follower controlling the filters of the
second octave down. This filter process BOTH the dry and the
octave down signal.
POLY
This mod replaces the entire circuit with a polyphonic octaver.
RAW SYNTH
This mod outputs the unfiltered octaves, resulting in a very raw
and aggressive tone.
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