Doepfer A-100(~ 40 MB) - Manual (Page 572)

A-170 Dual Slew Limiter System A - 100 doepfer
4
4. In /Outputs
! In • § In
Sockets ! (upper SL) and § (lower SL) are the slew
limiters’ inputs. Patch in the voltage you want to
modify here, and use the time controls t
C
(upper SL)
and/or t
A
, t
R
(lower SL) to alter the waveform’s rise and
fall characteristics.
" Out • $ Out
" (upper SL) and $ (lower SL) are the outputs for the
modified signal.
For precision voltage control (for instance of VCO
pitch or portamento) only use the upper slew limiter.
Because the diodes in the lower slew limiter are
voltage-dependent, there is a voltage offset of about
0.5 V. This naturally makes it unsuitable for precise
1V / octave work, but for simple voltage control or in
use as an AR envelope generator, this is no problem
at all.
5. User examples
Portamento
The example in Fig. 2 shows the A-170 (upper SL !)
as a portamento generator. With this patch, indepen-
dently controllable portamento is created every time a
note is played. Use control 1 to set the portamento
time.
Fig. 2: The A-170 as a portamento generator
CV
MIDI
A-170
MIDI-CV V CO
upper SL