Hi Mike,
I would be interested in collaborating with you. Did you have anything in mind or any details?
I am still ironing things out with this.. but I believe in another month or so it will be working much more smoothly.
It's slow going. I only have some evenings and weekends to dive into the coding. I've been learning alot along the way.
It's taken a long time just to study the code to understand it enough to dive in and modify it the way I want it to work.
Every night I mess around with it, it gets a bit better :).
Honestly I didnt think I'd ever get it working, but I just kept at it and very surprised at the results.
It could be possible to use a smaller chip, the F405RG instead of a 407. Get pin size down to 64 instead of 100.
The possibilities can be very interesting. This synth could be mixed in with the Poly's original DCO's and perhaps have a way to selectively run it through the Analog Filter chip.
Of course the built in FX wont be much good if you used them while running it thru the Poly's VCF.
It's also very possible to make a standalone version too.. Could be a side project that people would be interested in.. a cheaper Shruthi.
I just got in the $1.08 16/24bit stereo DACs from DigiKey. I'll have to wait a few weeks for some breakout boards I bought on ChinaEbay to mount/test them.
Unbelievably cheap how much this stuff is now.
I have a ton of ideas, very interested in hearing yours.
/Blaine