UDO Super 6 — Owner’s Manual
41
VCF (Voltage Controlled Filter)
The voltage controlled filter (VCF) is an integral part of the instrument’s
sonic character, shaping the sound of the oscillators by modifying their
signals’ spectral content.
The Super 6’s main filter is an analog 4-pole, 24 dB per octave, resonant
low-pass filter using a classic polysynth filter design from Sound
Semiconductor (SSI). It is preceded in the signal chain by a voltage
controlled high-pass filter (HPF) that can either be off, fixed, or can also
track the low-pass filter cutoff frequency for band-pass operation.
The filter section.
The
low-pass filter subtracts high frequencies above the filter cutoff
frequency (
FREQ). The harmonic content below the cutoff frequency will
pass through.
The
high-pass filter
(
HPF
) subtracts low frequencies. This can be
disabled (
OFF) for bass sounds or set to a fixed value of around 500 Hz
(
FIX
) to remove ‘muddy’ low end from polyphonic sounds such as organs
and low strings. It can also track the low-pass filter cutoff frequency
(
TRK
) to provide a pseudo
band-pass filter
where only a narrow band of
frequencies is passed.
The Super 6 provides various options for modulating the filter’s cutoff
frequency, making the filter section extremely flexible and capable of a
wide range of sonic possibilities.
Summary of Contents for SUPER 6
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