"Leroy Jenkins (March 11, 1932 - February 24, 2007) was a composer and avant-garde jazz violinist and violist.

Jenkins was involved in the Association for the Advancement of Creative Musicians (AACM) while a public school teacher in Chicago. He co-founded the Creative Construction Company with Anthony Braxton and others. He led the Revolutionary Ensemble and formed a trio with Anthony Davis and Andrew Cyrille.

During 1987 he toured Europe as part of Cecil Taylor's group.

He gained recognition for music-theatre works such as The Mother of Three Sons (written in collaboration with Ann T. Greene), Fresh Faust and The Negros Burial Ground (in collaboration with Ann T. Greene), and The Three Willies (in collaboration with Homer Jackson)."

"Norris Jones, better known as Sirone (September 28, 1940 Ð October 21, 2009) was an American jazz bassist and composer.

Born in Atlanta, Georgia, Sirone worked in Atlanta late in the 1950s and early in the 1960s with "The Group" alongside George Adams; he also recorded with R&B musicians such as Sam Cooke and Smokey Robinson. He moved to New York City in the middle of the 1960s, where he co-founded the "Untraditional Jazz Improvisational Team" with Dave Burrell. He also worked with Marion Brown, Gato Barbieri, Pharoah Sanders, Noah Howard, Sonny Sharrock, Sunny Murray, Albert Ayler, Archie Shepp, and Sun Ra.

He co-founded the Revolutionary Ensemble with Leroy Jenkins and Frank Clayton in 1971; Jerome Cooper later replaced Clayton in the ensemble, which was active for much of the decade. In the 1970s and early 1980s Sirone recorded with Clifford Thornton, Roswell Rudd, Dewey Redman, Cecil Taylor, and Walt Dickerson.

In the 1980s, he was member of Phalanx, a group with guitarist James "Blood" Ulmer, drummer Rashied Ali, and tenor saxophonist George Adams.

From 1989 he lived in Berlin, Germany where he was active with his group 'Concord' (with Ben Abarbanel-Wolff and Ulli Bartel.) He was involved in theater, film, and was a practicing Buddhist.

He died on October 21, 2009."

"Jerome Douglas Cooper (December 14, 1946 - May 6, 2015) was an American free jazz musician. In addition to trap drums, Cooper played balafon, chirimia and various electronic instruments, and referred to himself as a "multi-dimensional drummer," meaning that his playing involved "layers of sounds and rhythms". AllMusic reviewer Ron Wynn called him "A sparkling drummer and percussionist... An excellent accompanist". Another Allmusic reviewer stated that "in the truest sense this drummer is a magician, adept at transformation and the creation of sacred space".

Cooper studied with Oliver Coleman and Walter Dyett in the late 1950s and early 1960s, then studied at the American Conservatory of Music and Loop College. In 1968, he worked with Oscar Brown, Jr. and Kalaparusha Maurice McIntyre in the U.S. but moved to Europe before the end of the decade, where he played with Rahsaan Roland Kirk, Steve Lacy, Lou Bennett (with whom he visited Gambia and Senegal), the Art Ensemble of Chicago, Alan Silva, and Noah Howard. After returning to the U.S. in 1971, he joined the Revolutionary Ensemble alongside Leroy Jenkins and Sirone, where he remained for several years, and played piano, flute, and bugle in addition to drums. In the 1970s, he played with Sam Rivers, George Adams, Karl Berger, Andrew Hill, and Anthony Braxton. In the 1980s he worked with McIntyre again, as well as with Cecil Taylor.

Cooper died in Brooklyn on May 6, 2015, aged 68, from complications of multiple myeloma, according to his daughter, Levanah Cummins-Cooper."