The Polymoog has 71 oscillators, 71 VCFs and 71 VCAs. Thats still a bit of a challange for one little ARM (without floating point, IIRC).
The Polymoog has 71 note polyphony but only 2 oscillators (and I think 2 filters) didnt it?
Well, yes and no: It does have only 2 VCOs, but there are also top-octave-synthesizer-chips and a bunch of digital frequency dividers, so an emulator has almost as much work to do as with 142 real VCOs.
The Filters: Once, i had to repair one of 'em and i still remember the 71 PCBs, one for each key. That quote above reflects my memory, but according to analoguediehard, there are 2 VCAs and a VCF for each voice.
This is very attainable as there are plenty of vsts which are more complex than the poly moog. I am assuming if this can run debian and programs on top of that it can be used to create a complex dedicated synthesiser.
I am certain it can. After learning that the r-pi has a vector FPU capable of performing up to 8 single-precision-ops in parallell plus a dedicated FMAC pipeline, i now think it could deliver a perfect polymoog emulation.
I for one have absolutely no idea where to start however
Get the bristol source, read the polymoog owners manual (if there are unclear bits in it, look at the service manual (only 175.66Mb)) and start coding