Doepfer A-156 Quantizer - Manual (Page 10)

A-156 Quantizer System A - 100 doepfer
10
If an ADSR is used as a control voltage source the
A-129/3 is no longer required as the ADSR generates
only positive voltages.
One very interesting combination is with a Theremin
module A-178 as the continuous voltage from the
Theremin is converted into “musically correct“ intervals
by the quantizer, e.g. only notes from a major scale.
Another typical application is shown in fig. 8: using the
Quantizer A-156 with the Analog/Trigger Sequen-
zer A-155.
The upper sequencer generates an 8-note sequence.
The voltage "Pre Out 1" controls the VCO pitch and is
processed by the quantizer to obtain exact tunings.
Without the quantizer it would be very difficult to obtain
the correct intervals.
The lower sequencer is synchronized to the upper and
runs at 1/8 speed (output “/8“ of the Clock Divider
A-160 used as clock input). The lower sequencer
controls the transpose input ) on the quantizer. Con-
sequently the sequence on the upper sequencer is
transposed by the lower sequencer as after each pass
of the upper sequencer the lower sequencer advances
to the next step.
P
Instead of the lower sequencer a MIDI key-
board in combination with a MIDI-to-CV inter-
face (A-190) may be used for transposition
(see fig. 7).
P
Instead of the lower sequencer also a ran-
dom voltage (A-118 Random voltage or com-
bination of Noise and S&H triggered by A-
160) may be used. In this case one obtains
random transpositions. If it is desired that the
transpositions match with certain scales (e.g.
major chord) that can be adjusted indepen-
dently of the quantizer already in use another
quantizer is required.