These videos and audio files are bonus content related to the April 2015 issue of Guitar World. For the full range of interviews, features, tabs and more, pick up the new issue on newsstands now or at the Guitar World Online Store:
http://guitarworld.myshopify.com/collections/guitar-world/products/guitar-world-april-15-abasi-satriani-govan
Check out this lesson, "Yin and Yang" where Jimmy Brown explains the connection between The E Minor and D Major-Hexatonic scales.