This video is bonus content related to the April 2014 issue of Guitar World. For the full range of interviews, features, tabs and more, pick up the new issue on newsstands now or at our online store:http://guitarworld.myshopify.com/products/guitar-world-april-14-kiss Be sure to check out my brand-new website, andyaledort.com, which has all of the latest gig info, gear, lesson (private and Skype), session availability and more! Open tunings have been exploited for use with slide guitar since the earliest days of Delta blues. The most commonly used open tunings for slide are E, D, G and A. There are, of course, others that are utilized, with many distinctive variations, depending on the musician and style of music. Joni Mitchell has employed a wide variety of unusual tunings in her songs, as have Stephen Stills and Ry Cooder and many other contemporary musicians operating primarily in styles of music outside of blues, such as pop, rock and folk. This edition of In Deep will focus on open G tuning and how it is used in blues slide-guitar playing.