@julien On the #midi->cv I'm using using the #mcp4728. I plan on making a dedicated midicv #eurorack module maybe as my next project, but I had this available for testing.

On the #VCO itself, it's the #ad9833 which is sort of secondarily a #DAC and primarily a digital synthesis chip.

I'm starting to have a neat idea about maybe a clever software + hardware way of doing polysynth myself pretty simply and cheaply. I have to experiment with it, tho.