Wikipedia : This day (July 4, 1992), in Buenos Aires, Argentina, died Astor Piazzolla, an Argentine tango composer and bandoneón player.
Ástor Piazzolla : At first, Piazzolla tries to hide his tanguero past and his bandoneon work, thinking that his destiny is in classical music. This situation is quickly remedied when he opens his heart to Boulanger and he plays his tango “Triunfal” for her.
@allmusic : Piazzolla’s place in Argentina’s greatest cultural export is roughly equivalent to that of Duke Ellington in jazz — the genius composer who took an earthy, sensual, even disreputable folk music and elevated it into a sophisticated form of high art.
@last.fm : Piazzolla’s nuevo tango was distinct from the traditional tango in its incorporation of elements of jazz, its use of extended harmonies and dissonance, its use of counterpoint, and its ventures into extended compositional forms.