Tiptop Z-DSP - Manual (Page 11)

Looking into Voltage Control.
The Z-DSP contain 2 types of Voltage Control (VC),
one is the regular analog control such as the
Feedback gain and VC over the Wet/Dry mix. These
can be swept at any speed and well into the audio
range. The circuit is designed such that with the knob
at the center of its rotation, feeding a +/-2.5V signal
will sweep the parameter from 0-100% for the
Feedback gain, or 100% Dry to 100% Wet for the
Wet/Dry mix.
The other type of VC is digital. This control input takes
the analog signal and converts it into digital data.
Voltage Control of the three DSP parameters is an
example of this method.
The digital VC signals are filtered and smoothed to
ensure that vibration, noise or supply variations do not
cause the value to flutter between adjacent values.
While this results in a smooth, noise free parameter
control, there is a response delay of ~100ms. The
response of these 3 inputs is very much like a Vactrol
input in an analog module.
The 3 VC-DSP knobs allow for manual sweep of the
digital parameters. The knobs act as an offset for the
VC-P voltages, much like how the Frequency knob of
an analog filter offsets a CV input. With the knob at its
center position, a +/-2.5V signal will sweep the
associated parameter will from MIN to MAX
The VC-PRG gives the user the option to switch
through programs using different voltage levels. This