Doepfer A-138 a/b Mixer (linear / logarithimc) - Manual (Page 4)

A-138 MIXER System A - 100 doepfer
4
5. User examples
Mixing audio signals
D Use A-138 b, and patch the audio signals to be
mixed into sockets ! to $.
D Adjust the relative amount of each signal with con-
trols 1 to 4, and the volume of the whole mix with
control 5.
D The whole mix is output at socket %.
Fig. 1: Mixing audio signals with an A-138 b
Mixing control voltages
You may sometimes need more CV inputs than a parti-
cular module has - for instance if you want to control
VCF 1 with an ADSR, LFO, aftertouch, and keyboard
tracking.
In that case, you’ll need to use an A-138a VCA to mix at
least two of the CVs, and send the output to one of the
VCF’s free inputs (see Fig. 2).
Fig. 2: Mixing control voltages with an A-138 a
LFO
ADSR
Input 1
Output
A-138
MIXER
Input 2
Input 4
Input 3
In 1
In 2
In 3
In 4 Out
CV
After Touch
VCO
VCO
Input 1
Output
A-138
MIXER
Input 4
In 1
In 4 Out