NEW YORK
Lena Horne, the enchanting jazz singer and actress who reviled the bigotry that allowed her to entertain white audiences but not socialize with them, slowing her rise to Broadway superstardom, died Sunday. She was 92.

Legendary singer Lena Horne dies - latimes.com

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"What you hear in a great jazz band is the sound of democracy. “The jazz band works best when participation is shaped by intelligent communication.”
Harmony happens whenever different parts get to form a whole by means of congruity, concord, symetry, consistency, conformity, correspondence, agreement, accord, unity, consonance…….