[A6] Moog Filter use

[Marzzz at aol.com]

In a message dated 6/19/06 7:00:45 AM, cgould11 at tampabay.rr.com writes:


> > Using the 24 db slope filter a lot got me thinking about the whole
> > resonancebass loss thing.  I like the filter, I like it a lot
> > actually, but I somewhat fail to see the benefit of the bass loss. 
> > Having used other filters that somehow must compensate for this
> > because resonance doesn't drop the bass or the volume, I wonder
> > if anyone actually prefers the Bass drop, and if so why?  I can
> > understand that it can be used for a pseudo band pass response,
> > but is there anything else?
> 
> If you sweep the resonance with an envelope, you might be able to
> get a good snap at the beginning of a bass sound. Apart from that,
> I can't see great use for it.
> 
> But I understand that this is pretty typical for how resonance
> works by default: it's supposed to emphasize frequencies around the
> cutoff, after all. In some designs, when you emphasize higher
> frequencies, the bass decreases noticeably, and the Moog is one of
> those designs. I guess other filters like the Roland ones, and the
> OBX, work around this design issue somehow, as the decrease is less
> noticeable.
> 

My understanding is that one of the characteristics of the MiniMoog filter (I 
am not sure this applies to the 904A modular filter or the Voyager) is that 
the resonance decreases as you play down into the bass- I remember Mike 
Caliroso talking about this, and writing A6 patches where this effect is programmed 
in.