This is an odd tip I received from a professor on a way to do chord substitutions.
First, it involves taking a composed progression. Like this one below:
From there, you take a chord you want to substitute (be it in this case the Fmaj7 chord) and change the root to a minor/major third below or above the original. For the pitch F, we get Db, D, Ab, and A.
After that, you change the quality of the chord from the root you choose to a minor chord (either a min7 or a min7(b5), otherwise known as a half-diminished seventh chord).
And there you have it. 8 different substitute possibilities for one chord. However, as I have learned from using this professor’s tip, not all the possibilities work. So, take this as a “last-resort” idea when you are stuck and in need of a more interesting harmonic progression.
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