A soundtrack from the game called Heroes of Might and Magic 2 with a special in-game player, so you can enjoy the opera tracks in-game again. The music doesn't usually work on newer systems with newer dvd players (special cd players with a sound thingy were half-needed, same for their drivers) and running the custom in-game player will trigger / manage the music tracks instead of the game trying to use a non-existing part of a sound driver / cd player driver. You can find me using it on youtube by browsing youtube and searching for Heroes 2 Templayer. (The opera version of the OST in the Sorceress castle is so great!)