I have always had these same issues.

Its interfearance along the power bus. The doepfer power bus is a pretty simple affair - just strips of metal between the modules.

If you look at other modular manufacturers theres normally components on the bus, i presume, to stop x-talk between modules. Id
assumed initially that doepfer did somthing on the board themselves to reduce this, but am not too sure - i know little about any of
this :(

When i get arround to it, im going to read up more on this, and maybee build a power bus for my a-100 system with components similar
to those used by other mnfrs.

Anyone know any better answers

Cheers, Julian

----- Original Message -----
> I've even moved the LFO
> around with but the interference doesn't go away. It is definately
> the above mentioned modules, as changing the frequencies on
> the module changes the sound of the interference. Is this
> normal Can I shield against it