The Soloing Series - Modern Rock Guitar Soloing. In this DVD, Danny Gill unveils the mystery of the heavy riff. In this intense workout, you will discover a whole new world of chords & single note riffs with Drop D tuning. Danny will also take you through a variety of picking hand techniques, including mutings, pitch harmonics, downstrokes, double picking, & alternate picking. There is even a section on tuning the entire guitar down two whole steps to a low C for something extra fat & chunky.