12 bar blues

For a few weeks we have been opening with 12 bar blues play alongs. Tonight we spiced it up with some theory! We played around with the basic 12 bar blues progression using three different keys: C, A and G.

Link to lesson and video showing how it works, with multiple examples.

So how do you know which chords to play as the fourths (IV) and fifths (V) in a given key? We started with our root note (I) and counted on our fingers up to the fourth and fifth fingers. Here is where it can help to visualise the Circle of Fifths. From any given root note, look anti-clockwise for the fourth note and clockwise for the fifth.