Hello long time no see, now I will teach you about M7 and mM7 chords. First, do you know what is it a M7 or mM7 ?. M7 is abbreviation of Mezzo Dominant. And mM7 we can say Minor mezzo Dominant. They are of them having of each of functions. You can see table of M7 here:
You can see, the dominant of CM7 chord is B. Why B, because C Interval ( n – 2 – 1 ½ ) < M7 ( on B). Do you know, M7 character many used for jazz song.
Chord Progression of Pop Style : C – Am – F - G
M7 Style : CM7 – AmM7 – FmM7 – GM7
And for table of mM7 you can see here:
You can see, the dominant of CmM7 chord is B. Why B, because Cm Interval ( n – 1 ½ – 2 ) < M7 ( on B). Do you know, mM7 character many used for jazz song.
Progressive Chord of Pop Style : Am – Dm – G - C
M7 Style : AmM7 – DmM7 – GM7 – CM7
That is all, I hope this tutorial really useful for you, and see you next time in new learning...