Willie Henry Ruff Jr. (born September 1, 1931) is an American jazz musician, specializing in the French horn and double bass, and a music scholar and educator, primarily as a Yale professor from 1971 to 2017. Personal life He was born in Sheffield, Alabama. Ruff attended the Yale School of Music as an undergraduate (Bachelor of Music, 1953) and graduate student (Master of Music, 1954). Professional career Performing Ruff played in the Mitchell-Ruff Duo with pianist Dwike Mitchell for over 50 years. Mitchell and Ruff first met in 1947, when they were teenaged servicemen stationed at the former Lockbourne Air Force Base in Ohio; Mitchell recruited Ruff to play bass with his unit band for an Air Force radio program. Mitchell and Ruff later played in Lionel Hampton's band but left in 1955 to form their own group. Together as the Mitchell-Ruff Duo, they played as "second act" to artists such as Louis Armstrong, Count Basie, Duke Ellington, and Dizzy Gillespie. From 1955 to 2011, the duo regularly performed and lectured in the United States, Asia, Africa, and Europe. The Mitchell-Ruff Duo was the first jazz band to play in the Soviet Union (1959) and in China (1981). Mitchell died in 2013. Ruff was chosen by John Hammond to be the bass player for the recording sessions of Songs of Leonard Cohen, an album first released in 1967. During those sessions, he and Cohen laid down the bed tracks for most of the songs on the album. He is one of the founders of the W. C. Handy Music Festival in Florence, Alabama. The first festival was held in 1982. Teaching Ruff was a faculty member at the Yale School of Music from 1971 until his retirement in 2017, teaching music history, ethnomusicology, and arranging. Ruff's classes at Yale, often with partner Dwike Mitchell, were free-flowing jam sessions: roller-coaster rides through the colors of American Improvisational Music. The duo could play in the style of most notable jazz artists and related styles. They had a large repertoire. He is founding Director of the Duke Ellington Fellowship Program at Yale, a community-based organization sponsoring artists mentoring and performing with Yale students and young musicians from the New Haven Public School System. The program was founded in 1972 as a "Conservatory Without Walls" to "'capture the essence and spirit' of the tradition of African-American music". By its 30th anniversary in 2002, the