Somebody posted this link in another thread a few days ago:
http://people.uncw.edu/russellr/rhythm.html
It tells the chord changes for the tune "I got rythm" and then delivers some even more jazzed chord variations. Anyway Í´m trying to analyze the first 8 bars, and so far not everyhing is clear on WHY this works:
Here´s the basic progression and my reasons why I think that it works:
Bb Gm | Cm F7 |Bb Gm | Cm F7 |
Bb Bb7 | Eb Ebm | Bb F7 | Bb |
Everything is diatonic in here ecxept the Bb7 which functions as a secondary dominant ( is this the right expression?? its when you make the chord leading to another one a dom 7 chord, therefore it tricks the listener into thinking that there´s a new tonal center. In this case Bb7 leads to Eb...)
Here´s the jazzed up progression:
Bb Bb7/D | Eb Edim | Bb/F Dbdim | Cm F7 |
Bb Bb7/D \ | Eb Ebm | Bb/F F7 | Bb ||
Compared to the basic version this features a B7/D, which is again a secondary dominant leading to Eb (Eb is a substituion for Cm here). Since I´m no jazzer I dont really know what to make of the the Eb- Edim measure. Playing a major chord and its diminished version on half step higher occurs a few time in this prog, also its only one single note that changes between these 2, yet I dont know WHY it is like that (EDIT: Now that I think about it; it seems that THAT IS indeed the reason why it works as there´s just a single note alteration between these two chords). Also I cant explain whats going on in measure 3 and 6 in the jazzed up version. Any suggestions?
thanks for your help!
ALEx:-)