The title is indeed ambiguous. It could just as well refer to sound-coding systems/languages like Sonic Pi, or to what you imagined. (Which would be an oddly specific kind of music, but cool! The operation of a compiler turned into music, somehow?)

That said, I am not disappointed. But then I am also the one who posted this link in the first place. I started using Lilypond last year for transcribing the melody voices from complex sheet music and automatically transposing them into different keys when needed (which is immensely useful). Just recently I discovered that it can also generate MIDI output, so in addition to having a convenient tool to get beautiful sheet music in whatever key I need, I can now easily have my computer play the melodies and memorise them by listening (which for me, on my current instrument, is much easier than playing from notes directly).

That's what https://musicforprogramming.net/ is for

Have a look at https://chuck.stanford.edu/ or https://supercollider.github.io/.

Not me. It’s nice and refreshing to see software that is about improving playing music for people rather than people saying “we’ve solved music with our new algorithm” (as if the thing to solve with music we’re somehow a singular aspect of the mechanics).

Check out toplab.org for all things music-livecoding related. Tidalcycles which is haskellnased is one of the favorites of the scene but there are many options. Or one of the reccomendations in the thread here (esp. supercollider which is lisp based or c-sound for max renderingperformance stuff)

check out https://alda.io/ - it takes some form of music notation and plays it using general MIDI synth

That, or music produced by a compiler to indicate its status.

I was more disappointed they didn't seem to have a "Make MIDI" option; or if they did I missed it.