FREQ CV
AMOUNT
(unlabeled –
bottom right
knob)
If no cable is inserted into the cutoff frequency CV jack,
this acts as a secondary cutoff frequency control, which is
added to the current FREQ setting. The range of this knob
is limited, making it a control for fine adjustments. The
full range can only be accessed by adjusting both knobs,
however, with this knob set to the 12 o’clock position, the
FREQ knob by itself should cover most use cases.
If a cable is inserted into the cutoff frequency CV jack,
this
attenuates
the
CV
signal.
In
the
fully
counterclockwise position, no CV modulation occurs. With
some skill and possibly the use of a tuner app, it is
possible
to
get
1V/Octave
tracking
for
the
cutoff
frequency.
Note:
The cutoff frequency depends on the RESO setting, so
changing
the
resonance
will
also
slightly
adjust
the
cutoff.
This
is
inherent
to
the
Steiner-Parker
filter
design.
If
you
need 1V/Octave tracking throughout your
track or performance, do not change the RESO setting once a
satisfactory tracking has been established.
Control Voltage (CV) Inputs
Both CV inputs expect signals within the 0V to +10V range. Don’t worry
about supplying a higher or lower CV though: It will not harm the
module. CV modulation at frequencies within the audio range is both
possible and recommended.
Input
Function
RESO
This controls the intensity of the filter resonance, similar
to the RESO knob. If a cable is inserted, both the incoming
CV and the knob will manipulate the resonance amount.
FREQ
This adjusts the filter cutoff frequency. The intensity of
CV modulation is determined by the unlabelled FREQ CV AMOUNT
knob (bottom right knob). The front panel graphics indicate
the multiplication taking place between the CV and the FREQ
CV
AMOUNT
value.
The
LED
behind
the
X
indicates
the
resulting FREQ setting.
