Just got my Norand Mono...had a question regarding resonance knob

Just powered up my fresh new mono, and was tweaking some presets. I noticed that when the resonance knob goes past say, 3-4 o’clock, there seems to be a buzzing that occurs on top of the sound…

Is this normal? It goes away once I return the knob to 3 o’clock position…but just thought id check.

I just realized that perhaps this is the interplay between the filter self resonating and the osc itself…

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Yes, it would be the self-oscillation.
There’s a procedure described in the manual explaining how to set the range of the RES knob.