The attachment pcsonickbox.jpg is no longer available
This one, back in 2002 or so. The music was in MIDI format, some songs were changed completely, and the sound effects didn't work on Windows XP. It also had to be played in fullscreen, because windowed mode made the game run at what seemed like 5x speed for some reason, causing it to be practically unplayable.
I was stuck on the Carnival Night pillars for weeks, I think. If only I knew about GameFAQs (and emulators, for that matter) at the time...