I was running through a set last night and wanted to try the Analog Heat at the end.
There was a pretty strong buzz. I turned off all my gear except for the Heat, and it persisted. The Drive knob attenuated the buzz (expectedly).
After I restarted the Heat, the buzz disapeared.
Thoughts?
The only thing I can think of is the Heat got a little wonky for a minute…
or it was too close to someone’s cell phone or audio cables too close to power cables or wonky cables…
Saturday I was walkin around playing with a Volca Sample & when I walked too close to my wifi it buzzed loud. Also sometimes when certain cables are close together I get a buzz, I move the cables the buzz goes away.
If you were playing a set, I can see 1 of the above being a cuprit…
Did you have any audio rate modulation going on?
I figured it was probably that. I have pretty well shielded cables, but maybe that doesn’t matter.
I set it up vertically which put distance between the inputs and my mixer power.
Shielding the cables…I never thought of that, good idea!
& it IS odd that turning it off then back on stopped the buzzing…
hmmm…hopefully it doesn’t happen again, that sucks it happened during a set 
If you mean LFO, no. If you’re refering to sample rate, no. All analog domain.