There would be special full soundtrack for The Cave. We will publish it for download when at premiere of the game. The link is already in the rulebook. It would be full 1 hour long soundtrack to listen during play (and not only off course). It is not needed to play. Its purpose is to enrich your expirience during play (exactly like the movie soundtrack)
Here you can listen to short trailer of soundtrack for The Cave. Better equipment you would use, the quality and expirience will be better off course.