Doepfer

In my own case too, my synth does not consist solely of Doepfer 
modules. There are also Analogue Solutions and home-built modules.
Early on, I did have to run all the LFO modules from their own 
seperate power supply, due to a buzzing kind of interference that 
occurred in synchronisation with the frequency of the LFOs. 
Apart from this I have mixed both control and signal sources together 
on the power supplies.
But I'll certainly think about re-connecting things as was suggested.
Richard


--- In Doepfer_a100@yahoogroups.com, "trebcavxx" <richardbarton@c...> 
wrote:
> 
> You've highlighted a condition that's been present in my own 75-
> module synth almost from the word GO - pulsating modulation in the 
> sound output. It occurs to a greater or lesser degree in virtually 
> ALL patches (I have 11 VCOs) - and takesd the form of a cyclic 
> variation in amplitude - usually giving the sound a "woo-
> woo.......woo-woo........woo-woo" character rather than a straight 
> tremolo effect. As I say, this has happened from the humble 
> beginnings of a single VCO setup. I now have 5 seperate power 
> supplies in the cabinet. I'm a bit doubtful that LEDs are causing 
it 
> in my case, but would anyone have a cure for either of our 
problems ? 
> I notice the previous mailing has been pretty well ignored.
> Richard
> 
> --- In Doepfer_a100@yahoogroups.com, "stuadh" <stuadh@h...> wrote:
> > 
> > Hi,
> > 
> >   I've been reading up on interference caused by LEDs on the 
> > power bus in the archives, a problem that I'm having in my 
> > homemade and commercial cases.  I've minimised the problem 
> > by strategically placing the offending modules, but there was 
> > some discussion about including large capacitors between the 
> > power rails to help stop this problem occuring in the first place.
> > 
> >   Has anyone done this, and was it successful? 
> > 
> >   What constitutes a "large capacitor" and what type.  Does the 
> > polarity make a difference?
> > 
> > Yours Aye
> > 
> > Stuadh