I nerd-sniped myself porting SuperCollider's scsynth audio DSP engine for that Tau5 project. This then turned into SuperSonic (https://sonic-pi.net/supersonic/demo.html). I then wrapped SuperSonic back into a native form and used it to replace scsynth in v5 of Sonic Pi (https://github.com/sonic-pi-net/sonic-pi/releases/tag/v5.0.0).

I'm now working on a new audio DSP engine which builds on all this learning which combines my favourite parts of scsynth and Erlang. I'll be discussing and sharing progress over on my Patreon (https://patreon.com/samaaron).

As a sneak peek - here's an experimental prototype of the kind of direction I'm headed in: https://sonic-pi.net/tau