[kbenson]

> But lv2 and JACK are C APIs, so that's incentive for me to learn C, not Rust.

Maybe, but it might be an incentive to learn just enough C that you can wrap the C interface in Rust. The point of having an API is to have well defined behavior at a particular boundary, which can reduce quite a bit (but not eliminate) a lot of the reasons to use the language it was implemented in on the caller side.

I suspect learning rust will probably make you familiar enough with the basics of C that you won't have to do much specific C learning to use most libraries.