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Equalizer
With the two-band equalizer you can change the color of the reverb sound. In the
signal flow it is directly after the spring reverb unit (only in mode 1 and 2).
It is equipped with BASS and TREBLE controls for changing the levels for low and
high frequencies at +/- 15 dB.
Voltage Controlled Filter / Amplifier
The VCF / VCA section includes a complete
analogue filter and a voltage controlled amplifier.
Voltage Controlled Filter
The filter of the Retroverb is a voltage controlled
12dB-lowpass filter. It is activated or deactivated with
the VCF ON switch.
CUTOFF frequency and RESONANCE can be
adjusted with the corresponding controllers. The EG
INT controller, which works in a positive and
negative direction, sets the amount for the ATTACK-DECAY envelope for modulating the CUTOFF frequency. It’s
also possible to change the CUTOFF frequency with an external control voltage (see page 9).
Low-pass filter
A low-pass filter dampens frequencies that lie above a
defined frequency. Frequencies below that so-called
CUTOFF frequency can pass through the filter
unaffected.
If the filters output is routed back to its input, the
frequencies around the CUTOFF frequency are
amplified. This is the filters so-called RESONANCE.
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