The Trumpet Play-Along Series will help you play your favorite songs quickly and easily. Just follow the printed music, listen to the sound-alike recordings and hear how the trumpet should sound, and then play along using the separate backing tracks. The audio is provided online for streaming or download. The audio is 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.