[sdiy] AM8050 - Jupiter 6 SVF

[Paul Dhillon Weber]

Has the IR3109 been sufficiently documented/reversed engineered to support
replication with OTAs (LM13700) in a manner similar to analysis surrounding,
say, the unique sounding SSM2040? I am thinking of the various discrete
approaches by Schmitz and MOTM and lately, Hearn.

That would be interesting.

Paul 


On 6/5/10 12:05 PM, "Aaron Lanterman" <lanterma at ece.gatech.edu> wrote:

> 
> On May 29, 2010, at 1:38 PM, rob at emulatorarchive.com wrote:
> 
>> Hi SDIYers,
>> I have just completed a recreation of the 4-pole State Variable Filter from
>> the Roland Jupiter 6 using a Boss Phaser pedal as the source of components.
>> The details are on this web page, along with pictures and samples of the
>> completed FracRac module. The filter sounds a lot better than the old phaser,
>> and the 3 modes of BP, HP and LP all with self oscillating resonance makes
>> for a versatile and great sounding filter.
>> 
>> http://www.amsynths.co.uk/Filter_Bank2/AM8060/am8060.html
> 
> Nice work!
> 
> I bet it wouldn't be too hard to replace the custom IR3109 Roland chips with
> LM13700s and some usual expo converters... I might do it once I get through
> the 10 unfinished projects I have going on... ;)
> 
> - Aaron
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