The 12 bar blues structure phrase 2 (bars 5-8).

In our basic G blues progression, this was what phrase 2 (bars 5-8) looked like. Two bars of the IV7 chord C7, followed by two bars of G7. The first substitution is one we used in bar 2 of phrase 1, replacing the C7 with C#dim. Because diminished chords repeat [...]
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The 12 bar blues structure (phrase 1, bars 1-4)

This is the first in a series where I will analyse the 12 bar blues form and demonstrate how it can be transformed from a simple 3 chord progression to a more harmonically advanced structure. Expanding the form will introduce some chord substitution principles, as well as chord progressions that [...]
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