Gritty Blues Rock Backing Jam for Guitar in A Blues... with a nod to ZZ Top.
The basic progression is Am - F#m - E. So, if you are playing an A Blues Scale, make sure to mix in A Major over the F#.
Video image derived from a photo by Thomas Leuthard.
Photo: flickr.com/photos/thomasleuthard/5665717830/
License: creativecommons.org/licenses/by-sa/2.0/