(Piano Duet Play-Along). Phantom of the Opera is great fun as piano duets! This stellar series also comes with online audio that feature separate tracks for the Primo and Secondo parts perfect for practice and performance! Features nine songs from ALW's Broadway smash: All I Ask of You * Angel of Music * Masquerade * The Music of the Night * The Phantom of the Opera * The Point of No Return * Prima Donna * Think of Me * Wishing You Were Somehow Here Again. 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.