MOTM

I'm not especially versed in the Yamaha topology, but is the GX-1 something like the 
MOTM-420, in which two (in HP/LP mode) are required to simulate the Korg MS-20?

Chuck
Filtre Whore

--- In motm@yahoogroups.com, synth1@a... wrote:
> >
> > What makes the GX-1 VCF unique? How does it compare to the CS-80
> > filter? (I thought that they were similar!)
> >
> 
> Sounds completely different, due to completely different filter topology.
> The CS-80 VCF is a "standard" OTA-based state-variable filter (2 of them
> in parallel, in fact). The GX-1 VCF is a Sallen-Key "diode" filter (the
> filter's cutoff frequency is changed by modulating matched currents in a
> set of diodes).
> 
> Paul S.