The songs used as each opening in the anime are numbered, however each volume only goes up to 9 openings. The number keys work with their respective openings and will stop all other sounds when pressed, with [0] being the key that stops all songs and doesn't play any others after.
I give credit to the legal owners of each song as it is their legal property. I also give credit to Kishimoto-sama for creating the Naruto Anime and Manga series for us to enjoy.
