Comment by SwellJoe

I stumbled on FAUST while reading up on how to make VST plugins. It's incredibly concise for building signal processors and synths, as it removes nearly all of the tedious stuff; you just write functions to generate or act on a signal and plug them together in sequence or in parallel and it'll spit out a plugin to do the job. No boilerplate, no fiddling with the (very fiddly) VST SDK, etc. A C/C++ program is usually an order of magnitude longer than what a FAUST program would need to be.