I've been working on an audio DSP language and IDE https://ravescript.com and a DAW https://ravescript-next.deno.dev/ - both are in a good condition but still require a ton of work to be complete. Trying also to combine the two projects into one. Key features (especially in the DAW) are that the audio engine and the graphics engine are made from scratch and utilize WebAssembly/WebGL in a very efficient/performant architecture.