Elektor Formant Modular

--- In ElektorFormant@yahoogroups.com, "troels jrgensen" 
<the19thbear@h...> wrote:
> 
> i wonder if its a common problem with the formant, or if its just 
mine..
> if i modulate. say, the vca with a square lfo, i can actually HEAR 
the lfo ...

I think it is normal, a way to avoid this problem should be to 
synchronise the square with the modulated wave to avoid the cut of 
the sine (or other waveform) when its amplitude is not zero (zero 
crossing circuit, like triac drivers !). Or another way should be to 
reduce the slew rate of the LFO by filtering the signal  (a simple R-
C). I observed the same thing with my others synthesizers (DX7 or 
D50). When the slope of the envelope generator is very quick, I can 
hear a plop for every note. As I remember, I think we can even hear 
something like that in the album "Switched on Bach" (1968)from W. 
Carlos, precisely in the very original second movment of the 3° 
Brandb. So we can also think it is an element of electronic music ?

Stephen
(from France)