>>124531
okay, mystery solved!

>in fact, I'm almost certain this is a .xm module
it is, https://modarchive.org/index.php?request=view_by_moduleid&query=169726
>you should probably re-render it with interpolation off too
was wrong, the file explicitly says to turn it on (why lmao)
>was this from an OHC somewhere?
yes

and I very definitely last heard this tune between 14 and 10 years ago lol
what a fucking time warp, no wonder it felt like I was going nuts