Doepfer A-188-1 BBD Module - Manual (Page 14)

DOEPFER DOEPFER DOEPFER DOEPFER System A-100 BBD Module A-188-1
14
Clock Filter
The BBD audio output is filtered with a low pass (e.g. A-
108). The frequency of the low pass filter follows the BBD
clock frequency as the CV output of the module A-188-1 is
used to control the frequency of the low pass filter. A second
filter can be used at the audio input of the A-188-1 to limit
the frequency range of the processed audio input signal.
Basic Karplus/Strong Synthesis Patch
CV and gate are delivered e.g. by a sequencer, ribbon
controller, Midi-to-CV interface or Theremin. The time
parameters of the envelope generator (ADSR A-140) and
the feedback settings of the A-188-1 define the sound –
especially the decay time. If voltage controlled envelope
generator (e.g. A-141) and a VCA or VC polarizer are used
to process the feedback loop all parameters are voltage
controlled. Even other sound sources (6 oscillators or 2
oscillators of the A-117, noise signal of an A-118, or VCO,
or only short "click" of the ADSR) can be used. For more
realistic Karplus/Strong applications a filter in the feedback
loop can be used (see previous page).