(Instrumental Play-Along). These play-along packs include 13 themes from hit movies: Apollo 13 * Braveheart * Chariots of Fire * Dances with Wolves * E.T. * Jurassic Park * Mission: Impossible * Mr. Holland's Opus * Raiders of the Lost Ark * Forrest Gump * more. Backing tracks are accessed online using the unique code inside the book and can be streamed or downloaded. The audio files include PLAYBACK+, a multi-functional audio player that allows you to slow down audio without changing pitch, set loop points, change keys, and pan left or right.