True. I hadn't thought of the extra resonance peak. But you could replicate
the separate cutoff frequencies, couldn't you? There is a specific interval
between cutoff frequencies at any given point in time (width) and by
carefully choosing the center point (i.e. bandpass frequency) you could
probably come close; but given what Dave pointed out, it really wouldn't
sound the same at all unless you kept the filters wide open in all cases.
Interesting. This is the kind of stuff I love to think about but shouldn't
be thinking about while at work! :)
> -----Original Message-----
> From: Dave Bradley [mailto:daveb@...]
> Sent: Wednesday, April 05, 2000 11:48 AM
> To: motm@egroups.com
> Subject: RE: [motm] Purchasing decisions
>
>
> With a resonant highpass and resonant lowpass hooked in series, you get 2
> resonant peaks at the corners, instead of 1 in the center for a single
> bandpass. Also, you can control the cutoffs separately, like have an LFO
> modulating the HP but an envelope modulating the LP.
>
> Plus, if you hook the 2 filters in parallel, then you can get 12 db/oct
> notch filtering, doubly resonant peaks if both are set to NF, etc. Just a
> lot more flexible.
>
> Dave
>
> > -----Original Message-----
> > From: Brousseau, Paul E (Paul) [mailto:noise@...]
> > Sent: Wednesday, April 05, 2000 12:35 PM
> > To: 'motm@egroups.com'
> > Subject: RE: [motm] Purchasing decisions
> >
> >
> > I'm not quite clear... how is this different from a band-pass
> filter with
> > modulated Q / width and frequency? Not that it wouldn't be
> > really cool, I'm
> > just wondering if I'm missing a nuance?
> >
> > --PBr
>
>
>
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