Let’s discuss the main 12-bar blues form. This pattern is the same for countless blues songs. Once you play through it a few times, you’ll start to feel when to change chords, rather than having to constantly count through each measure.

Many blues songs use only 3 chords! This is great news for those of us who are tackling the blues for the first time. These chords are usually what we call 7th-chords (called dominant-7th chords, or sometimes simply called dominant chords).