(Piano Duet Play-Along). This great series comes with a CD that features separate tracks for the Primo and Secondo parts perfect for practice and performance The audio CD works on any CD player, and is also enhanced so Mac and PC users can adjust the recording to any tempo without changing pitch. 8 classics from this timeless cartoon, including: Blue Charlie Brown * Charlie Brown Theme * The Great Pumpkin Waltz * Joe Cool * Linus and Lucy * Oh, Good Grief * Red Baron * You're in Love, Charlie Brown.