Play Violin Today! Songbook. Now it's easy for violin players to learn cool songs! This book can be used on its own, or as a supplement to the Play Violin Today! method book. It contains 10 rock and pop favorites, plus a professional-quality CD with full-band backing tracks. The CD is also enhanced so that, in addition to working on any CD player, Mac and PC users can use it in their computers to adjust the recording to any tempo without changing the pitch.