Wiardgroup

Well, I'm not exactly a newbie to synthesis, but am just begining my 
venture into the world of analog modulares, and I had a question 
that is probably totally basic, but here goes anyway.  Please feel 
free to laugh, curse or otherwise direct insults my way for what is 
probably very obvious:).

I noticed in the "Noise Ring" page that one of the mp3s had a NR and 
a Borg Filter together.  One of the Borg was being used as a 
standard filter, but the other was acting as a VCA.  Now, I've read 
about filters being used as VCAs before, and it seems particularly 
in conjunction with vactrol-based filters.  But, I'm not entirely 
sure how this would work.  I assume that if you adjust the cut-off 
in any way that it would be, well, filtering the sound.  So, then, 
how do you get a filter to amplify the sound instead of filtering 
it?  Perhaps with the resonance somehow?  

Again, sorry if this is painfully obvious, but I went to a football 
game today so maybe my IQ has been lessened by association:).

J.R. "Bulldogge" Ross
& Snuffy, too:)