Doepfer

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