So for the MMG by Make Noise, could it cause this type of issue if you passed an AC signal to the DC input?
-- jb61264
no it's potentially the other way round - using the DC input to add DC to the AC signal...
-- JimHowell1970
Right. The usual culprit there is DC offset voltages finding their way onto the audio signals. In some cases, you might want that, but you DON'T want DC getting out of the modular, which can easily result in the above video atrocity. Even Uli didn't go with that on B's 2600, despite the ARP 2600 having that. Uli left it on the 3.5 mms, but the TRS 1/4" jacks are AC-coupled. This is one of the main reasons why I toss in one of Happy Nerding's Isolators on builds that I do, since that module also acts as a DC block (transformers no habla DC), allowing NO DC to get past it. Plus, transformers always beef your sound up when you push 'em a little.