Barre Phillips is an American jazz bassist. A professional musician since 1960, he moved to New York City in 1962, then to Europe in 1967. Since 1972, he has been based in southern France where, in 2014, he founded the European Improvisation Center.

Marion Brown was an American jazz alto saxophonist, composer, writer, visual artist, and ethnomusicologist. He was a member of the avant-garde jazz scene in New York City during the 1960s, playing alongside musicians such as John Coltrane, Archie Shepp, and John Tchicai. He performed on Coltrane's landmark 1965 album Ascension. AllMusic reviewer Scott Yanow described him as "one of the brightest and most lyrical voices of the 1960s avant-garde."