I'm actually thinking that I can use it in a project for an artist who's collaborating with a museum - it's a sort of clone of radio.garden, at the moment I've got a white noise placeholder (I know it sounds like crap) but the goal is to manipulate the sound while "tuning the radio station" (https://www.punkbit.com/prototyping/world-radio-tuning-dial/)
I also think that your skills are very welcomed to Audiokit (http://audiokit.io/), it's not Javascript but you can use Swift lang, check it out!
Ah, I see what you mean yeah... if you're already familiar with low-level audio, you might find it more useful to look at `wasgen`, which is the library underneath wafxr. It's harder to use but much more general. You basically give it an array of objects describing the sounds you want, like:
And it makes all the nodes and applies the envelopes and cleans up afterwards, etc. Wafxr is basically a friendly UI for it, but for what you're doing I guess you'd prefer to be scripting the sounds directly.
Audiokit looks very cool, I don't have any apple devices but I'll keep an eye on it!