Guitar 411 Whammy Bar Mojo with Doug Doppler DVD Guitar 411 Presents Whammy Bar Mojo with Doug Doppler Master dives, climbs, dips, vibrato, warbles, intevals using open stirngs and harmonics Learn the underlying techniques to keep unwanted string noise out of your whammy bar licks Special section on string changing with tips on how to get and stay in tune quickly Study with one of the guitar players behind the Guitar Hero Video Game Series