User Manual

doepfer
System A - 100
Sampler
A-112
13
The length of the delay memory is defined by the
parameter Len (see below). The maximum length is
the complete sampling memory (64kbyte = 65536
bytes). With a sampling frequency of 32 kHz this
corresponds to 2 seconds delay time. The
actual
delay time is decided by a combination of the length
of the delay memory (Len) and the sampling fre-
quency
.
Gate = low:
The module is waiting for gate = high; LED
3
is off.
The initial sampling frequency is set.
Gate = high:
The delay mode is started; LED
3
turns on. Retrigger
is active, i.e. a gate transition to low and back to high
starts the delay mode again.
H
Moving from delay mode directly to delay
with freeze is not possible. To perform this
one has to interrupt the delay mode (switch
5
to S1/S2 or switch
7
to Len) and then
select the desired mode.
P By feeding the A-112 output back to its input
one obtains a repeat or echo (see fig 5).
Beware: too much feedback leads to an
avalanche-like effect. In this case the feed
back component has to be reduced.
fig. 5: Echo
• Reverse delay mode
This mode is the same as the delay mode but the
playback of the delayed signal takes place in reverse.
H
Memory bank S2 is overwritten in this mode!
Principle: Same as the normal delay mode but writing
into the delay memory is performed forward, and
reading the delay memory is performed backward. As
this is a very simple “bog standard“ algorithm, overlap-
ping effects may occur and lead to interference, glit-
ches or clicks in the audio output signal.
A-1 12
A-112A-138
Feedback
Audio
In
Audio
Out
5
55
56
66
67
77
7
Audio / Wave-CV In
Tune / CV
Eff Rev Norm
audio signal sampling fre-
quency