[sdiy] Roland 80017A & 5524A Juno chips

[Aaron Lanterman]

> Anyway The JX3P itself uses the IR3109 chip.  Below is a link with a 
> diagram of it.
>
> http://www.experimentalistsanonymous.com/diy/Schematics/Filters%20Wahs%20and%20VCFs/IR3109%20VCF.gif

Huh, that's the same structure as an SSM2040.

You could try using a 13700s and TL084s (like Ray does), or any other 
favorite OTA and buffer, or even the discrete OTA/buffers in the various 
SSM2040 chip clones, drop that all into the JX3P circuit and see what it 
sounds like.

- Aaron

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