Doepfer A-152 Voltage Addressed Track&Hold / Switch (Multiplexer) / Digital Outputs - Manual (Page 8)

Voltage Addressed T&H/Switch A-152
System A - 100 doepfer
8
For the last 3 examples the waveform changes more or
less accidentally. If the A-149-1 resp. A-149-2 is used
the waveform changes can be synced as for these
modules the random voltages are triggered by a clock
signal. Especially in combination with an A-155 a lot of
interesting applications may result. E.g. the clock inputs
of the A-149-1 can be controlled by the sequencer clock
or a A-155 trigger row. In both cases the change to the
next waveform is in sync with the sequencer.
If the triangle output of a VCO is used to control the
A-152 only odd harmonics will occur as the graphic
waveform is passed through symmetrically in both direc-
tions.
Mono-Poly-Konverter
The picture below shows an application of the A-152 that
distributes a monophonic pitch control voltage (e.g. the
CV of a sequencer, a MIDI-to-CV interface or a mono-
phonic keyboard) into several polyphonic control volta-
ges that are used to control several VCOs. And that's
how it works:
The pitch CV is connected to the common input of the
T&H unit. The positive transition of the corresponding
gate signal indicates that a new CV is generated (e.g. by
pressing a key on the keyboard or during the advance to
the next sequencer step). The gate signal is used to