15 favorites from the holidays with recorded accompaniments, including: Deck the Hall · The First Noel · Good King Wenceslas · Hark! the Herald Angels Sing · It Came upon the Midnight Clear · O Christmas Tree · We Three Kings of Orient Are · and more. 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.