This is actually one project of mine that's out there that I really wish wasn't- it's really really poor code that I made very quickly as a proof of concept that some friends asked to see in an unfinished state and somebody put it on the internet for me and it kind of got carried away. I've made a couple versions of this since then that are much much better and have plans to make one that is even better than those. I got derailed when a company inquired about buying the newer algorithms from me, which led to talks about mass producing synthesizers based on those algorithms, but then we hit some roadblocks with the FCC and that got put on hold. So, I don't really even know what's happening with the newer versions, but the old one is definitely one that I don't want to spread around.
Also, regarding the audio library, that kind of defeats the original purpose of what I wanted to do, which was to hear the natural switching characteristics of the digital outputs of the teensy being used for gritty chiptune audio. I feel like the audio library would just make it a sort of generic thing, but I can explore that in the future too. I'll keep you posted if I get permission to release the newer teensy synth algorithms, which are much much more in tune and the program uses the analog output (so it doesn't require a transformer on the digital out.) Right now I'm completely inundated with starting up a composing company, a video game company, going through a divorce, moving, and a bunch of other little stuff, so I don't know what the immediate future holds yet. I'm curious if I get one of those audio boards if it'll spark some new ideas for other synths too. So we'll see! I'll send you an email if I make some progress with either.
-Brian