The 12 Bar Blues

2 Guitarsists walk into a room. One of them says let’s play something, so what’s the first thing they play? Most likely the Blues. This guide will look at steps to be able to play the blues. First let’s take a look at The 12 Bar Blues Progression

Notice how the chords are written in roman numerals? This number is the numeral or scale degree in relation to the scale. By writing chords in this way we can start thinking of chords (and notes) in relation to its’ key signature. The 12 Bar Blues has three dominant 7 chords - I7 IV7 & V7

Try it out: Blues Brother - Sweet Home Chicago