I have discovered that part of my UNIAUD audio driver problem can be solved. Using the command line UNIMIX.EXE, I can manually set the speaker output level. Turns out that there was actually sound being generated, but only to the headphone jack.
There’s still another problem, however: desktop sounds repeat and are very noisy and filled with static.
I will be publishing a few screenshots of ArcaOS in the coming days.