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