[sdiy] "Curtis" filter in Prophet 8

[JJB]

On the Dave Smith website he mentions somewhere that the Curtis chips 
used in the Mopho are not New Old Stock, but an actual new run of Curtis 
chips. Now how does one go about making _that_ happen?

 - Joel

Antti Huovilainen wrote:
> On Wed, 22 Jul 2009, David Ingebretsen wrote:
>
>> While not strictly DIY, I am curious if anyone knows anything about the
>> Curtis low pass filter in the Dave Smith Prophet 8 synthesizer? Is it 
>> using
>> Curtis chips or did they re-do the circuit with discrete components?
>
> My guess is CEM3396, which is basically two half DCos, VC mixer, 
> CEM337x/338x style filter (similar to OTA even if internally 
> implemented with some shortcuts) and a final VCA.
>
> Antti
>
> "No boom today. Boom tomorrow. There's always a boom tomorrow"
>   -- Lt. Cmdr. Ivanova
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