Sing 8 Chart-Topping Hits with Sound-Alike CD Tracks. Whether you're a karaoke singer or preparing for an audition, the Pro Vocal series is for you! The songbook contains the lyrics, melody and chord symbols for eight hit songs. The CD contains demos for listening, plus separate backing tracks so you can sing along. The CD is playable on any CD player, but it is also enhanced so Mac & PC users can adjust the recording to any pitch without changing the tempo! Perfect for home rehearsal, parties, ...