Visit http://www.totalguitar.co.uk/newsstand to buy the accompanying issue of Total Guitar, including the tab and explanation. Petrucci's on the cover and there's nine pages of prog rock goodness to be had!
Check out the video above to see the Dream Theater guitarist run through his legato warm-up exercise and then pick up Total Guitar 226 (on sale 19 March to 15 April) for the full tab and explanation - available in the UK and, digitally, worldwide via Apple Newsstand and Zinio from 19 March 2012.
Tutor: John Petrucci
Videographer: Martin Holmes