Hey again! So I *think* I might have a potential fix - if you pop open the Slasher U folder and open Game.cfg (which should open as a text file), change where it says "SEandBGM=3" to "SEandBGM=2". Fingers crossed!!
Well THAT worked! I thought I had tried all those permutations but it looks like either I didn't...or the moons aligned. The music is now playing fully, with no skipping. Amazing! Thank you!
