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 ofOrient 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 withoutchanging pitch, set loop points, change keys, and pan left or right.