Doepfer A-119 External Input/Envelope Follower - Manual (Page 7)

doepfer System A - 100
Ext. Input / Envelope Follower
A-119
7
“Ducking”, using an external signal
In the patch in Fig. 4 the amplitude of an external audio
signal controls the loudness of an A-100 patch.
Whenever an external audio signal is present, the
internal A-100 sound is attenuated (set the gain of
VCA 2 high).
Without the A-175 inverter, the opposite of this occurs
(set the gain of VCA 2 to zero).
Fig. 4: “ Ducking” by using an external signal
"Singing synth"
With the patch in Fig. 5, you can create a ‘singing
synth’: when you sing into the microphone, out of the
VCA comes a very interesting sound, distinctive but
difficult to describe. Turn up the first and second
sub-octaves on the A-115, and turn the original ound
right down.
Fig. 5: "Singing synth"
ext.
Audio Asym.
In
Over-
Load
Gate
Out Threshold
Gain
A-119
Ext. In.
Symm . In
Envelope
Out
Audio
Out
CV
Gate
VCO VCA 2 VCA 1
ADSR
A-175
0
0
Gain = 10
Micro
Asym.
In
Over-
Load
Gate
Out Threshold
Gain
A-119
Ext. In.
Symm. In
Envelope
Out
Audio
Out
VCA A-115
ADSR
A-120