This is a series of pro backing tracks to help you practice – just grab the audio, print the chord sequence, and get to work.
The most common musical form of blues is the 12-bar blues and is
simply a I - IV - V chord progression. The reason it's called the '12 Bar Blues' is because it is played over 12 bars, or measures, used to express the theme of a typical blues song.
A 12-bar blues is divided into three four-bar segments. A standard blues progression, or sequence of notes, typically features three chords based on the first (written as I), fourth (IV), and fifth (V) notes of an eight-note scale. The I chord dominates the first four bars; the IV chord typically appears in the second four bars and the V chord is played in the third four bars.
The lyrics of a 12-bar blues song often follow what's known as an AAB pattern. "A" refers to the first and second four-bar verse, and "B" is the third four-bar verse. In a 12-bar blues, the first and second lines are repeated, and the third line is a response to them - often with a twist.