Hi,

I just found on the doepfer page http://www.doepfer.de/a1324.htm

Does it make senst to make this VCA exponential, if it does not offer an
offset

To make it clear: VCAs without an offset are mostly usable for real
overall signal control only, like the classic "loudness" envelope to the
final VCA. It basically has to be clear, that there is a standard
situation "no signal at all" ( = "note off" at the classic synth structure).
Most other use cases like AM of audio or velocity control of signals
etc. pp. have the standard situation "some signal has to pass", which
means an offset voltage must control the VCA and this offset control
must be adjusted always to the corresponding control signal amount.


Now: The mentioned standard situation of VCAs without offset uses
envelopes as CV. But envelopes do not need exponential VCAs. The CV
itself has already an exponential characteristic.


So to my opinion is:
if this VCA is intended to be exponential it misses a onboard standard
offset (without that it is useless for exponential use)
if this VCA is intended to have no onboard standard offset, then it
should be linear.
But as it is planned now, it is "neither fish nor fowl".

Florian