"Barry John Guy (born 22 April 1947, in London) is a British composer and double bass player. His range of interests encompasses early music, contemporary composition, jazz and improvisation, and he has worked with a wide variety of orchestras in the UK and Europe. He also taught at Guildhall School of Music.

Born in London, Guy came to the fore as an improvising bassist as a member of a trio with pianist Howard Riley and drummer Tony Oxley (Witherden, 1969). He also became an occasional member of John Stevens' ensembles in the 1960s and 1970s, including the Spontaneous Music Ensemble. In the early 1970s, he was a member of the influential free improvisation group Iskra 1903 with Derek Bailey and trombonist Paul Rutherford (a project revived in the late 1970s, with violinist Philipp Wachsmann replacing Bailey). He also formed a long-standing partnership with saxophonist Evan Parker, which led to a trio with drummer Paul Lytton which became one of the best-known and most widely travelled free-improvising groups of the 1980s and 1990s. He was briefly a member of the Michael Nyman Band in the 1980s, performing on the soundtrack of The Draughtsman's Contract.

Guy's interests in improvisation and formal composition received their grandest form in the London Jazz Composers Orchestra. Originally formed to perform Guy's composition Ode in 1972 (released as a 2-LP set on Incus and later, in expanded form, as a 2-CD set on Intakt), it became one of the great large-scale European improvising ensembles. Early documentation is spotty - the only other recording from its early years is Stringer (FMP, now available on Intakt paired with the later "Study II") - but beginning in the late 1980s the Swiss label Intakt set out to document the band more thoroughly. The result was a series of ambitious, album-length compositions designed to give all the players in the band maximum opportunity for expression while still preserving a rigorous sense of form: Zurich Concerts, Harmos, Double Trouble (originally written for an encounter with Alexander von Schlippenbach's Globe Unity Orchestra, though the eventual CD was just for the LJCO), Theoria (a concerto for guest pianist Irène Schweizer), Three Pieces, and Double Trouble Two. The group's activities subsided in the mid-1990s, but it was never formally disbanded, and reconvened in 2008 for a one-off concert in Switzerland. In the mid-1990s Guy also created a second, smaller ensemble, the Barry Guy New Orchestra.

Guy has also written for other large improvising ensembles, such as the NOW Orchestra and ROVA (the piece Witch Gong Game inspired by images by the visual artist Alan Davie).

His current improvising activities include piano trios with Marilyn Crispell and Agusti Fernandez. He has also recorded several albums for ECM, which often focus on the interface between improvisers and electronics, including his work in Evan Parker's Electro-Acoustic Ensemble and his own Ceremony.

Guy's session work in the pop field includes playing double bass on the song "Nightporter", from the Japan album Gentlemen Take Polaroids.

He is married to the early music violinist Maya Homburger. After spending some years in Ireland, they now live in Switzerland. They run the small label Maya, which releases a variety of records in the genres of free improvisation, baroque music and contemporary composition.

Guy's jazz work is characterised by free improvisation, using a range of unusual playing methods: bowed and pizzicato sounds beneath the bass's bridge; plucking the strings above the left hand; beating the strings with percussion instrument mallets; and "preparing" the instrument with sticks and other implements inserted between the strings and fingerboard. His improvisations are often percussive and unpredictable, inhabiting no discernible harmonic territory and pushing into unknown regions. However, they can also be melodious and tender with due regard for harmonic integration with other players, and at times he will even play with a straight jazz swing feel.

Similarly, in his concert works, Guy manages to alternate harmonic and rhythmic complexity worthy of 1960s experimentalists such as Penderecki and Stockhausen with joyous, often ecstatic, melody. Works such as "Flagwalk" for string orchestra and "Fallingwater - Concerto for Orchestra" display Guy's compositional skill in handling extended forms and writing for large instrumental groups.

Some of his compositions, such as "Witch Gong Game" for ensemble, use graphic notation in conjunction with cue cards to lead performers into playing and improvising material from numbered sections of the score.

He is also an architect."

"Marilyn Crispell is a graduate of the New England Conservatory of Music where she studied classical piano and composition, and has been a resident of Woodstock, New York since 1977 when she came to study and teach at the Creative Music Studio. She discovered jazz through the music of John Coltrane, Cecil Taylor and other contemporary jazz players and composers. For ten years she was a member of the Anthony Braxton Quartet and the Reggie Workman Ensemble and has been a member of the Barry Guy New Orchestra and guest with his London Jazz Composers Orchestra, as well as a member of the Henry Grimes Trio, Quartet Noir (with Urs Leimgruber, Fritz Hauser and Joelle Leandre), and Anders Jormin's Bortom Quintet. In 2005 she performed and recorded with the NOW Orchestra in Vancouver, Canada and in 2006 she was co-director of the Vancouver Creative Music Institute and a faculty member at the Banff Centre International Workshop in Jazz. In 2014 she led a three-week music residency at the Atlantic Center For the Arts, New Smyrna Beach, Florida, and in 2016 led a one-week residency at the Conservatory Manuel de Falla in Buenos Aires.

Besides working as a soloist and leader of her own groups, Crispell has performed and recorded extensively with well-known players on the American and international jazz scene. She's also performed and recorded music by contemporary composers Robert Cogan, Pozzi Escot, John Cage, Pauline Oliveros, Manfred Niehaus and Anthony Davis (including four performances of his opera "X" with the New York City Opera).

In addition to playing, she has taught improvisation workshops and given lecture/demonstrations at universities and art centers in the U.S., Europe, Canada, Australia and New Zealand, and has collaborated with videographers, filmmakers, dancers and poets.

Crispell has been the recipient of three New York Foundation for the Arts fellowship grants (1988-1989, 1994-1995 and 2006-2007), a Mary Flagler Cary Charitable Trust composition commission (1988-1989), and a Guggenheim Fellowship (2005-2006). In 1996 she was given an Outstanding Alumni Award by the New England Conservatory, and in 2004, was cited as being one of their 100 most outstanding alumni of the past 100 years."

"Paul Lytton (born 8 March 1947, London) is an English free jazz percussionist.

Lytton began on drums at age 16. He played jazz in London in the late 1960s while taking lessons on the tabla from P.R. Desai. In 1969 he began experimenting with free improvisational music, working in a duo with saxophonist Evan Parker. After adding bassist Barry Guy, the ensemble became the Evan Parker Trio. He and Parker continued to work together into the 2000s; more recent releases include trio releases with Marilyn Crispell in 1996 (Natives and Aliens) and 1999 (After Appleby).

A founding member of the London Musicians Collective, Lytton worked extensively on the London free improvisation scene in the 1970s, and aided Paul Lovens in the foundation of the Aachen Musicians' Cooperative in 1976.

Lytton has toured North America and Japan both solo and with improvisational ensembles. In 1999, he toured with Ken Vandermark and Kent Kessler, and recorded with Vandermark on English Suites. Lytton also collaborated with Jeffrey Morgan (alto & tenor saxophone), with whom he recorded the CD "Terra Incognita" Live in Cologne, Germany.

He played also on White Noise's pioneer electronic pop music album An Electric Storm in 1969."