Doepfer A-163 Voltage Controlled Divider - Manual (Page 3)

doepfer System A - 100 VC Frequency Divider A-163
3
3. Controls
1 Manual
With knob 1 the divisor N is manually adjusted.
Integer division of an audio frequency leads to the
so-called subharmonics. The table in fig. 1 shows the
subharmonic frequencies and pitches of an audio si-
gnal C5 (= 523,2 Hz) as master frequency input for the
A-163.
Fig. 1: Subharmonics of an audio signal with pitch C5
It becomes apparent that the subharmonics are equi-
valent to the tones of the minor chord scale.
H The term "subharmonic " is not quite correct as
the A-163 output waveform is rectange with a
marked harmonic spectrum in contrast to the
“pure” sine waves used in the harmonics theory.
For details concerning harmonic contents of
different waveforms please refer to the A-110 or
A-111 manual (VCO´s). For details about sub-
harmonics please refer to the A-113 manual.
2 CV
The positive/negative attenuation and inversion of
the control voltage fed into socket ! is adjusted with
control 2. The following connections are valid :
H The manual setting of control 1 and the exter-
nal control voltage fed into socket ! and at-
tenuated/inverted with control 2 are internally
added to generate the resulting control voltage
that defines the divisor N.
Divisor Freq. [Hz]
1 523,2 C 5
2 261,6 C 4
3 174,6 F 3
4 130,8 C 3
5 103,8 As 2
6 87,3 F 2
7 73,4 D 2
8 65,4 C 2
Pitch
Position Amplification Effect
-5 -1 invertierted CV
0 0 full attenuation
5 1 original CV (not inverted)