The 1970 festival was three days instead of the usual four with an estimated attendance of 40,400. Promoter George Wein reverted to an all-jazz policy after he stated the previous year had "maybe too much rock." On the first day there was a tribute to Louis Armstrong featuring Dizzy Gillespie, Bobby Hackett, Joe Newman, Wild Bill Davison, Jimmy Owns, and Ray Nance. Mahalia Jackson made a rare festival appearance to pay respects to Armstrong. Saturdays performers included Nina Simone and the Herbie Mann Quintet with Ike & Tina Turner closing out the night. The festival concluded on Sunday with performances from Roberta Flack, Gene McDaniels, Buddy Rich and Ella Fitzgerald.