doepfer
System A - 100
18dB Low Pass
A-103
5
5. User examples
As the A-103 is very similar to the A-102 please refer to
the user examples of the A-120.
The filter’s cut-off frequency can be modulated in various
ways. The basic modulations types are:
•
VCF - LFO (A-145, A-146, A-147)
Cyclical changes of the
sound spectrum
•
VCF - ADSR
(
A-140, A-141, A-142)
Modulation by an envelope results in triggered gra-
dual change of the
sound spectrum
•
VCF - Keyboard CV
This modulation produces pitch-related filter opening:
the higher the pitch, the more the filter opens, and
the brighter the sound becomes.
But even other voltage sources may be used to control
the frequency of the A-103: e.g. Theremin A-178, Light-
controlled CV A-179, Joy Stick A-174, MIDI-to-CV inter-
faces A-190 or A-191, Random Voltage A-118, S&H
A-148, Sequencer A-155, Quantizer A-156, Foot Con-
troller A-177 and many more. Please refer to the user’s
guides of these modules for details and additional
examples.
