Moog LABYRINTH User Manual page 22

EXPLORING LABYRINTH
THE FILTER PATH
As a complement to the Voltage-Controlled Wavefolder (VCW), Labyrinth also contains a Voltage-
Controlled Filter (VCF) which will subtract spectral components away. You are likely already much
more familiar with the concept of a filter since filters have been a mainstay of Moog instruments since
the 1960s, but the filter in Labyrinth creates a different tonal palette from previous Moog filters.
MOD VCO LVL RING MOD LVL
VCF CUTOFF will control the cutoff frequency of the filter, sweeping high
frequencies away as it is turned counterclockwise. Just like with the VCW
FOLD control, we have the EG1/CV AMT control to scale envelope modulation
from EG1 (or from an external CV patched into the CUTOFF input) to the VCF
CUTOFF. SEQ2 AMT will route the control voltages from SEQ2 to modulate the
VCF CUTOFF, providing per-step tonal shaping possibilities.
Turn up RESONANCE to add filter feedback, creating a peak in the frequency
spectrum at the VCF CUTOFF frequency. Instead of using the classic Moog
ladder filter, Labyrinth uses a 2-pole state-variable filter design which, in
addition to changing the sonic characteristics of the filter, will not attenuate low
frequencies when RESONANCE is turned up.
(Continued)
Turn the BLEND control fully clockwise and make sure that
ORDER is set to PARALLEL (more on these controls below)
to hear only the filter path and not the wavefolder. Playing
with the VCF CUTOFF now will not show the full timbral
possibilities of this control—sending a sine wave to a filter
doesn't give the filter very much to grab on to.
Turn up VCO LVL, RING MOD LVL,
and MOD VCO LVL all the way in the
mixer to mix all three signals and add
MOD VCO LVL
lots of saturating overdrive. Turn up
the NOISE LVL slightly as well to add
some noise on top, and feel free to
turn up MOD VCO FM AMT as well.
Now we have a signal full of harmonics
for the filter to carve up.
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