[sdiy] Yamaha CSY-2 solo synthesizer
colin at colinfraser.com
Wed Nov 10 00:00:16 CET 2010
> The VCF board has four ICs on it, all by Rohm. Two BA626s and
> two BA627s. I have been unable so far to identify what these
> are but what is most peculiar about this is that the organ
> features neither the older NE module based filters, nor the
> IG chip based filters of the CS synthesizers
...unless those Rohm ICs are really transistor (or diode) arrays, and the
filters *are* essentially a re-hash of the contents of the NE modules.
Or even a discrete prototype of the topology used later in the IG chips.
There's a project for you ;-)
> VCA, FEG and AEG contain standard parts, CA3080 OTAs in metal
> can packaging and so on.
The GX-1 uses CA3080 VCAs too.
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