Doepfer A-100(~ 40 MB) - Manual (Page 743)

doepfer System A - 100 Spring Reverb A-199
5
Fig. 2: Frequency-selective reverb
Another field of activity results from the external feed-
back feature (see fig. 3). Any sound-processing mo-
dule or combination of such modules can be inserted
into the feedback path of the spring reverb module
(represented by “XYZ” in fig. 3). Examples are VCA,
any filter, phaser, frequency shifter, distortion/waves-
haper, ringmodulator, vocoder, audio divider and so
on.
A VCA in the feedback path e.g. leads to a voltage
controlled (normal) feedback. Filters or filterbanks in
the feedback path modify the spectral behaviour of the
reverb effect (different to the frequency-selective re-
verb described shortly). Very unusual sounds result
from ringmodulators, frequency shifters or vocoders
inserted into the feedback path of the spring reverb
module.
Fig. 3: External feedback
Mix Out
SPRV Audio
In
75 Hz
Audio
Out
A-128
11 kHz
50 Hz
Mix
Audio
In
XYZ
Audio
In
Level
Level
Emphasis
ext.
Feedb.
In
A-199
SPRV
Mix
Reverb
Out
Mix
Out
Feedback
Audio
Out