Doepfer A-167 Analog Comparator / Offset Generator / Subtractor - Manual (Page 6)

A-167 CMP System A - 100 doepfer
6
The module can even be used to add the free-running
mode to each ADSR (e.g. A-140 or A-141) similar to a
LFO but with separate controls for rising and falling
edge and exponential waveforms - in contrast to the
linear waveforms of a LFO.
In the patch of fig. 3 the ADSR-LFO is gated by means
of the gate input of the A-140 (e.g. with another LFO or
a gate signal controlled by a keyboard or MIDI inter-
face). This means that the "ADRS-LFO" oscillates only
as long as the gate input of the A-140 is "high". The
waveform and frequency of the ADSR-LFO is determi-
ned by the controls Attack, Decay, Sustain and Re-
lease of the A-140, and Offset and +In of the A-167.
The Gap setting of the A-167 is irrelevant.
H Only certain control settings lead to an "ADSR-
LFO" (especially Offset, +In and Sustain) !
The patch in fig. 4 shows another ADSR-LFO. Wa-
veform and frequency are deterrmined by the parame-
ters Attack and Release of the A-140, and Offset, Gap
and +In of the A-167. Decay and Release of the A-140
are irrelevant.
H Even in this patch only certain control settings
lead to an "ADSR-LFO" (Offset, +In and Gap) !
Fig. 3: ADSR-LFO 1
Fig. 4: ADSR-LFO 2
A-167
Comparator
+ In
Offset
+ In
Inv . Comp. Out
Gate
Decay
Release
Attack
A-140
ADSR
Sustain
Retrigger
Output
Gate Control
A-167
Comparator
+ In
Offset
+ In
Inv. Comp. Out
Gate
Release
Attack
A-140
ADSR
Output
Gap