Amazon.com description: Product Description: (Instrumental Play-Along). 9 songs with accompaniment tracks so saxophonists can play along with a real band. The tracks can be accessed online using the unique code inside each 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. Songs include: Climb Ev'ry Mountain * Do-Re-Mi * Edelweiss * The Lonely Goatherd * Maria * My Favorite Things * Sixteen Going on Seventeen * So Long, Farewell * The Sound of Music.