Sonic Pi was done in clojure once upon a time. Looks like ruby now?
I haven't used Overtone in many years but it looks like it's still going: https://github.com/overtone/overtone
I recall at some point the author started working on yet another version which used its own language instead of a ruby DSL but I don't know what happened with that
https://www.patreon.com/samaaron/posts/announcing-sonic-1126...
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