It works very well, as far as I’ve pushed it. My biggest concern was the timing, i.e. the ability to deliver gate signals without an objectionable amount of jitter. In the light testing I’ve done so far it has no audible jitter. Hopefully that will be true when I’m pushing data through all four channels. The firmware is currently set up so that it responds in a monophonic manner to MIDI channels 1-4 with velocity and modulation data mapped to the low-res DACs. If I find that it can’t deal with four channels of full data without getting sloppy I’ll have to tune the code. So far, though, I’m entirely happy with its performance.
I did discover that my VCOs are tracking a bit sharp so I’ll have to recalibrate them. Apparently the commercial MIDI-CV interface I replaced with this one wasn’t as accurate.