Doepfer A-115 Audio Divider - Manual (Page 4)

A-115 DIVIDER System A - 100 doepfer
4
Frequency division of external audio
The patch in Fig. 2 shows how the A-115 can
frequency-divide an external monophonic signal (such
as a vocal, flute, or single-note guitar).
Fig. 2: Frequency division of external audio
The A-119 again has a double task: to bring the
external signal up to the level the A-100 needs, so that
the divider works properly, and to send voltages to an
ADSR. That means that the Threshold control must
be set relatively high, so that when the signal isn’t
gated, there’s enough level for the divider to work
correctly.
The ADSR controls a VCA, and closes it as soon as
the gate shuts down, so that possible glitches (eg.
when the sound of a string is dying away), are
avoided.
H The ADSR’s release parameter must be set
to Zero.
If you like, you can patch an A-120 low pass filter (not
voltage controlled) in before the A-115. This may
improve the frequency division.
ADSR
A-119
VCA
ext.
Audio In
Audio Out
Env. Out
Audio In
F / 2
Audio
Out
F / 8
A-115
DIVIDER
F / 4
In
A-120
F / 16