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Doepfer system a - 100, User examples, Cv 1 • " cv 2 – Doepfer A-130/A-131 VCA (linear / logarithmic) User Manual

Page 5: Audio in 1 • $ audio in 2, Audio out, Typical voltage controlled amplification

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doepfer

System A - 100

VCA

A-130 / A-131

5

4. In / Outputs

! CV 1 • " CV 2

Sockets ! and " are control voltage inputs, whose
voltages are combined. The effective range of the VCA
goes from 0 V (no amplification) to +5 V (maximum
amplification).

§ Audio In 1 • $ Audio In 2

The signals you wish to amplify are input through audio
inputs § and/or $.

% Audio Out

The output signal here is the audio inputs amplified by
the VCA..

5. User examples

Typical voltage controlled amplification

A standard VCA patch is shown in Fig. 4. An ADSR
envelope produces a time-dependent amplification
curve, which can affect any sound source you choose.
The curve can be very quick (with a fast envelope) or it
can produce long, slow changes in the volume of a
sound.

Fig. 4: Time dependent amplification using an ADSR

NOISE

ADSR

Au di o
In 1

CV 2

C V 2

Ga in

A-131

V C A-EX P.

In 1

Aud io Ou t

Out