Yes, I’ve been using adc~ to get audio into supervp for years. […] I’ve always had a bit of that noise floor in the signal.
yes, that’s it!
Update: I just tested the supervp.cross helpfile patch in Max standalone with [sig~ 0] and [sig~ 1] inputs and both produced the buzzing sound. Interestingly, having [sig~ 0.5] sounds the same as [sig~ 1]
The DC part will be filtered out, so all the other bins are zero.