On Wednesday, July 1, 2015, Florian Anwander fanwander@mnet-online.de [Doepfer_a100] <Doepfer_a100@yahoogroups.com> wrote:
Do you use original Doepfer patch cables?
This sounds like a missing ground connection between the two racks
(which is normal!). In this case the patchcable has to provide a proper
ground connection. Using cables with stereo-mini-jacks will not work!
You must use cables with mono jacks on both sides.
Florian