In Disc 3 , in the romantic scene between Squall and Rinoa in the Ragnarok (after talking to Esthar air station), the game should play "Eyes on me" song during the whole scene (starting when Squall turns off the artificial gravity).
I noticed that if you mount disc 3, you won't be able to hear the song (I don't know why). I tested the mounted CD on Media Player (not classic) as a music CD and the track including the song played well...
If you burned disc 3, the game will play the song normally. Burning or mounting doesn't affect saved games, meaning you can switch between the actual and virtual CD and load your previously saved game.