Excuse me for being dumb as a rock, But is this some
sort of joke? I'm almost tempted to go and
test drive one just to see what happens.

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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…….