A plucked string simulator using Julia

One of the issues with Julia for this kind of thing is that it’s tuned for throughput more than latency, especially the sort of worst-case latency you worry about for realtime systems. You have to be careful to make sure any methods that are called ahead of time so they’re not JIT-compiled in your audio loop. It’s also hard to write zero-allocation code, which is what you need if you don’t want the GC pausing your program at an inopportune time.

git clone https://lee-phillips.org/pluckit/code

> The page communicates over a websocket with a Julia program running on a server. That program does the calculations, generates the plots and the sound, and sends them back for insertion in the page. No files are created. The part of the Julia program handling the communication amounts to just a few lines, calling functions from the HTTP.jl library. We don’t need any web frameworks or boilerplate. I’ll supply the source shortly; check back here or subscribe to my feed for updates.