"Good improvisation communicates harmonic progression melodically. Effective melodies manipulate harmonic content through the use of guide tones and preparatory gravity notes, masterfully woven in systematic tension, release, and transparent harmonic definition."
The following video makes the case for that, and activity that isn't something that drives our evolutionary advancement or need for sustenance. Still, it makes our live better and more enjoyable. And uniquely human.
It is an intriguing question posited. How is it that patterns of simple vibration (sound waves) can stir and move us emotionally?
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