It sounds like you’re looking for a nicer version of Max/MSP. I’d certainly be keen to see Luna’s GUI applied to that domain, but I think it’d be better to hope that Max take UI / language design lessons from Luna than Luna add audio processing. The std lib in Max is so astoundingly rich — the number of highly optimized DSP ops implemented in C is going to be hard to match. Even if, say, there was a way to run Luna on the browser, so as to leverage the Web Audio API, you’d have nothing close to what Max has for processing.

But of course, Max’s UI and the design of their atomic language constructs really leave a lot to be desired. In this regard, it seems Luna is already flying circles around them. (Though I say this without having actually used Luna, so... grain of salt.)

Comparing the two is so fun, as it shows just how underexplored the world of node-based dataflow languages is.