Jazz music, which was developed by african americans and was influenced by both african rhythms and european harmonic structure, first appeared at the turn of the 20th century and has since undergone …Art pepper (born sept.1, 1925, gardena, calif. , u. s. â€died june 15, 1982, los angeles, calif. ) was an american jazz musician noted for the beauty of his sound and his improvisations on alto saxophone, …Among the many seminal figures of jazz and blues who performed at the cotton club, bandleader duke ellington was perhaps the most closely associated with the venue.