CMajor
https://cmajor.dev/
> You’ve heard of C, C++, C#, objective-C… well, Cmajor is a C-family language designed specifically for writing DSP signal processing code.
They have a JIT engine, but it also compiles to WASM so it can run on the web. This means old synths can be ported to run on the web!
https://cmajor.dev/docs/Examples/Pro54/