The PS1 used CDs. Many games could be dropped into a cd player, and if you skip the first track (the data track), the rest of the game's music/audio could be played.
It was possible to do the same with some PC games! I have fond memories of listening to the soundtracks of Driver, and Knights and Merchants, on my little stereo.
Yeah, X-Wing vs Tie Fighter had a lot of the popular Star Wars music in redbook audio so it would work fine in a CD player, a fact that I was super excited to find out when I was a kid playing with my action figures.