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Playing The 12 Bar Blues

The chord progression I-IV-V-I is the basis of the 12-bar blues, which is nearly always written in 4/4 time (four quarter notes to a bar). The Roman numerals indicate the individual notes of the scale. In the key of C, for example, a 12-bar blues uses three basic chords: C (I), F (IV), and G (V). A very common structure for a 12-bar blues is to write four bars in C, two bars in F, two bars in C, one bar in G, one bar in F, and two

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