in the first half of the 20th century including Five-Foot Two . Using the same concept of the resolving 5th chord progression, we can substitute Diatonic (C-Dm-Em-F-G7-Am-Bdim) chords for some of those dominant 7ths. Here’s the result when we apply it to the 1-3-6-2-5-1 progression above. I-iii-v i-ii-V7-I (C-Em-Am-Dm-G7-C). Play this