Now instrumentalists can play-along with some of today's top hits! These songbooks feature solo instrumental arrangements with professionally-recorded demonstration and backing tracks so after a little bit of practice, you can sound like you're playing with the band! Audio is 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.