[sdiy] FracRak digital module?

[David Betz]

I'm thinking of building a FracRak format modular synthesizer and would like to find a module in that format that has some analog inputs and outputs and a microcontroller or DSP with open source firmware that can be loaded with custom code. Actually, something with an FPGA would be even nicer. Does anyone know of something like that that would fit into a modular system? A few years ago there was a module called PSIM-1 that had a PIC chip but it is no longer being made.

Thanks,
David