NANO Modules - València 2019 ©
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Controls
• Frequency (FREQ)
With this control you adjust the Cut-Off
Frequency fc, above which the filter
attenuates all frequencies. At maximum
level, the filter is fully open. The more you
turn down this control, the more the high
frequencies are filtered.
The sound becomes mellower and less
bright (see Fig. 1) until at minimum level the
filter is completely shut, and there will be no
output signal at all.
/CVF
Frequency attenuverter. Adjusts the
amount and polarity of frequency
modulation from the CVF input.
• Resonance (RES)
With this control you adjust the filter’s
resonance (emphasis) - the parameter
which emphasises the frequencies around
the cut-off point fC (see Fig. 2 on p.4).
Close to its maximum setting, the filter
becomes so resonant that it goes into
self-oscillation, and starts behaving like a
sine wave. Self-oscillation occurs at about
80% of the course of this potentiometer. You
can take advantage of this effect, and use
the VCF as an additional oscillator.
/CVR
Resonance attenuverter. Adjusts the
amount and polarity of resonance
modulation from the CVR input.
fc
frequency
out
fc
resonance
frequency
out
Fig.1 Low Pass Filter
Fig.3 Low Pass Filter
Fig. 4 Band Pass Filter
Fig. 2 Band Pass Filter
fc
frequency
out
resonance
frequency
out
fc
