http://news.yahoo.com/s/nm/20060807/...negal_rap_dc_1

DAKAR, Senegal (Reuters) - Senegal's rappers pride themselves on having helped change their world six years ago by urging people to vote in elections that ended four decades of rule by one party. It was rap's coming of age in the country.

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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…….