We want you to start jamming over the staple progression ... s the most common form of the 12-bar blues, but it is common in music to see the arrangement of chords moved about a bit.

In my last column, we looked at some rhythm and lead approaches to playing over a 12-bar blues progression in ... or describe, an A9 chord sound (A, C#, E, G, B) with the notes G, B, C# and ...