Tommy Igoe Groove Essentials 2.0 - DVD. This master drummer/educator has created the world's standard system for groove development, Groove Essentials picks up where the top-selling original left off, featuring 53 brand-new intermediate to advanced grooves,including odd meters,Thousands of drummers around the world, from amateurs to full-time professionals,are currently using Groove Essentials materials to unlock their drumming potential.