Hi,
what's the 2nd outlet~ of the [vcf~ ] ?
and, normally, in which bounds should evolve the Q parameter ?
thanks.

[vcf~] is implemented as a single-pole complex filter. So the left outlet is the real part, and the right is the imaginary part. IIRC it has more of a low-pass character.

I think Miller said he realized only fairly recently that the right outlet actually is a low pass output.