33913DVD - Guitar World: Learn Slide Guitar. The Ultimate DVD Guide. Everything you need to know. Open A,D,E,G and standard tunings; Slide scales for soloing in all keys; Improvising; Open-tuning chord forms; Muting; Vibrato; Delta and Electric blues; Shuffles. The styles of - Robert johnson, Keith Richards, Duane Allman, Muddy Waters, Johnny Winter and more.