Our V7 chord in the key of A would be E7. Our IV7 chord in the key of A would be D7.įor the last four measures, we are going to switch to a V7 chord for two bars and then resolve back to a I7 for the last two measures. For this lesson, we will play in the key of A, so our I7 chord is going to be A7 (click to view the finger position for this chord).įor the next four measures, we are going to switch to a IV7 chord for two bars and then switch back to a I7 for two bars. The first four measures of the 12-bar blues is played of a I7 chord. This means, if we were playing in the key of A, our I7 chord would be A7, if we were playing in key of D, our I7 chord would be D7, and so on. The first four measures of the 12-bar blues are played over the tonic chord I7. The “7” next to the roman numerals represent that the chord is a dominant 7th chord. The chords above are expressed in roman numerals. There are three chords commonly used in this pattern: I7, IV7, V7. Once you complete these twelve bars, you repeat the entire form. 12-Bar Blues Form & Structureīefore we learn any fingerpicking patterns, we need to understand the structure of the 12-bar blues.Īs you probably guessed, the 12-bar blues is made up of twelve bars or measures. Feel free to watch this video first, but you may want to keep reading first to understand how the 12-bar blues is structured.
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