"Roy Sinclair Campbell Jr. (September 29, 1952 - January 9, 2014) was an American trumpeter frequently linked to free jazz, although he also performed rhythm and blues and funk during his career.

Born in Los Angeles, California, in 1952, Campbell was raised in New York City. At the age of fifteen he began learning to play trumpet and soon studied at the Jazz Mobile program along with Kenny Dorham, Lee Morgan and Joe Newman. Throughout the 1960s, still unacquainted with the avant-garde movement, Campbell performed in the big bands of the Manhattan Community College. From the 1970s onwards he performed primarily within the context of free jazz, spending some of this period studying with Yusef Lateef.

In the early 1990s Campbell moved to the Netherlands and performed regularly with Klaas Hekman and Don Cherry. In addition to leading his own groups, he performed with Yo La Tengo, William Parker, Peter Brotzmann, Matthew Shipp, and other improvisors. Upon returning to the United States he began leading his group Other Dimensions In Music and also formed the Pyramid Trio, a pianoless trio formed with William Parker. He performed regularly as part of the Festival of New Trumpet Music, which is held annually in New York City.

He died in January 2014 of hypertensive atherosclerotic cardiovascular disease at the age of 61."

"Daniel Carter (born December 28, 1945, in Wilkinsburg, Pennsylvania) is an American experimental saxophone, flute, clarinet, and trumpet player active mainly in New York City since the early 1970s.

Carter is a prolific performer and has recorded or performed with William Parker, Federico Ughi, DJ Logic, Thurston Moore, Yo La Tengo, Sun Ra, Cecil Taylor, Sonic Youth, scientist/musician Matthew Putman, Cooper-Moore, Sam Rivers, David S. Ware, Yoko Ono, Living Colour, Medensky Martin and Wood and Jaco Pastorius among others. He is a member of the cooperative free jazz groups TEST and Other Dimensions In Music."

"Sabir Mateen (born April 16, 1951) is a musician and composer from Philadelphia who plays primarily in the avant-garde jazz idiom. He plays tenor and alto saxophone, B♭ and alto clarinet, and flute.

As a young man, Mateen was originally a percussionist, and he started playing flute as a teenager. From there he moved to alto and then tenor saxophone. He started out playing rhythm and blues in the early 1970s which led him to the tenor saxophone chair of the Horace Tapscott Pan Afrikan Peoples Arkestra. He has performed or recorded with Cecil Taylor, Sunny Murray, William Parker, Alan Silva, Butch and Wilber Morris, Raphe Malik, Steve Swell, Roy Campbell, Jr., Matthew Shipp, Marc Edwards, Jemeel Moondoc, William Hooker, Henry Grimes, Rashid Bakr, Hamid Drake among others. He also is a member of the band TEST, with Daniel Carter."

"Matthew Heyner came to New York from Richmond Virginia, an angel-faced skater boy who played bass and liked Primus. After seeing William Parker at the Alterknit he traded in his electric for an upright and became a star of the avant-garde.

Matthew plays bass for mega-art bands No Neck Blues Band and Test in addition to his work with the Mammals of Zod. He is also the husband of internationally recognized dancer and choreographer Nami Yamomoto.

Matthew plays intuitively, using the bull fiddle as an analog synthesizer with potentially unlimited sound-making potential. He has been known to play the bag he carries the bass in. Sometimes he plays his bass upside down, hanging from the ceiling.

Matthew has also played with Thurston Moore, Rashid Bakr, Matthew Shipp, and tons of other free jazz superstars."

"Tom Bruno was an American free jazz drummer, known for playing his drums in the subway of NYC. Founder member of Test and The New York City Artists' Collective. Born on April 14, 1932 in Canada; died on August 22, 2012."