Ah, it makes sense.
A few days ago I was watching DivKid’s video on the Joranalogue Filter 8.Tthe filter has two inputs and I was expecting it to work as a regular audio mixer, but it kind of adds one signal on top of the other and drives the filter, which is also interesting.
However, other filters like the Tonus VCF also have two inputs and the resulting output doesn’t seem to sound louder, so I guessed these are different types of mixers.
Doing some research on this topic this morning I’ve seen some mixing modules calling this ‘unity’ and ‘average’ mode mixers, I’m not sure if that’s the official name though. Anyway, I would say the ring modulator outputs the sum and difference of an ‘average mix’, right? That’s pretty cool.
Regarding the VCOs tuning, I’ve started doing some of those ‘ear training’ exercises and so far is proving to be much harder than I expected, I guess I’ll get it at some point but for now I won’t relay too much on my ears.