> Yes I had this too. Do you have a keyboard with a mod wheel connected The Dark Energy has a built in LFO (software) that
> is activated by the Mod wheel and connected to pitch.
>
>
> Neil
>
> Sent from my iPhone
>
> On 28 Jul 2015, at 23:51, alessandrogiurato@... 1 < Doepfer_a100@yahoogroups.com > wrote:
>
>
>
> Hi everyone!
> I have a problem with Dark energy 2. When it works for various hours i listen a change of the sound. If i play a note
> don't listen a linear sound but variable, dirty sound and like LFO influenced. Naturally i have exclude all the
> parameters like LFO.
> It's a natural problem or can i solve it
> Thanks
> Alessandro

Another reason that may cause this behaviour is a faulty external power supply (12V AC/800mA required). If it outputs not enough
voltage or current this may cause ripples of the internal DC voltages which sounds like 50/60Hz FM.

Best wishes
Dieter Doepfer