MOTM

> From: "Hugo Haesaert" <hugo.haesaert@...>
>
> Hi All !
>
> Graphic eq has only gain control .  Fixed Q and frequency .
>
> In the Elektor formantfilter 3 parallel state variable BP filters,
> with variable Q, freq and gain boost .
>
> Digisound has a dual resonant filter : twin state variable bp, based
> on CEM3350, same controls as above plus vc freq amount .
>
> Intresting stuff, can be done with a parametric eq, but as with all
> filters, the sound will depend on the actual circuit used and there
> are plenty of variables here :)

The MOTM 420 is 3 resonant bandpass filters. Fixed resonance, but
individually tuneable filters so you can do similar interesting things. I
plan to use mine a lot for formant types of things, not just swooshing
around with the LFOs.

> I am not too familiar with these other "fixed filter banks" .  What
> are the controls per section/band, if freq is fixed, what center
> frequencies are used ?
>

The Moog fixed filter banks are fixed frequency AND resonance, so no better
than a common graphic eq. Just a gain control for each band. If I remember
right, there is an 8 band and a 12 band version, each with an additional low
and high shelving control.

Dave