[sdiy] Mutable Instruments DIY Synth

[Tom Wiltshire]

I don't know what Tim's got in mind, but I'd use two SSM2164s. One  
would do four filter stages, the other would deal with the resonance  
VCA, stereo output VCAs, and one spare VCA for some modulation or other.

I don't know of any in-production DIP analogue filters (aside from  
switched cap stuff) so SSM2164 is the nearest we've got.

T.

On 17 Mar 2010, at 23:52, Jason Proctor wrote:

>> Actually, I've been working with Olivier on some possible mechanical
>> stuff (housing design) and on a new replacement for the CEM based
>> VCF/VCA. He is fully aware of the problems with using the 3379 in a
>> product, but it started out as just something he wanted to build for
>> himself so he was originally planning on making only a few. There has
>> been so much interest that he's making a larger run and has found a
>> source for a bunch of 3379s (as CEM chips go, they're actually not  
>> too
>> hard to find). Still, the analog portion will soon be replaced in a
>> "mark II" product with some easier to find stuff. Also, as someone
>> else said, everything in the project is open source, so you could  
>> hack
>> your own VCF/VCA in with a little effort.
>
> *are* there any in-production DIP analogue filters? (Marion systems  
> overstock notwithstanding)
>
> it's mighty compelling to just spec a chip than go through laying  
> out a discrete ladder or whatever.
>
> anyone up for doing a DIP daughterboard for something phat and  
> hairy that's pin compatible with the 3379 or whatever?
>
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