Analogue systems

I once had that problem. I installed a whole case worth of modules at once. I never found the 
culprit but I suspect something was not plugged in properly and other modules didn't like it.

My advice which should answer some things is to not install everything at once. Try to install 
and test each new module one at a time or a few you don't think are a problem at a time. 
That way you can likely isolate exactly what dosen't like what. Maybe try the doepfer first 
alone?

Perhaps just because I installed everything really slowly and carefully when I was done the 
second time everything worked perfectly.