"Irène Schweizer (born 2 June 1941) is a Swiss jazz and free improvising pianist. She was born in Schaffhausen, in 1941. She has performed and recorded numerous solo piano performances as well as performing as part of the Feminist Improvising Group, whose members include Lindsay Cooper, Maggie Nichols, Georgie Born and Sally Potter. She has also performed a series of duets with drummers Pierre Favre, Louis Moholo, Andrew Cyrille, Günter Sommer, Han Bennink, Hamid Drake, as well as in trio and quartet sessions with others, including John Tchicai, Evan Parker and Peter Kowald. With Yusef Lateef, Uli Trepte and Mani Neumeier she performed at the Montreux Jazz Festival in 1967. One of her most enduring collaborations is with the improvising musician Rüdiger Carl (de)."

"Maggie Nicols (or Nichols, as she originally spelled her name as a performer) (born 24 February 1948), is a Scottish free-jazz and improvising vocalist, dancer, and performer.

Nicols was born in Edinburgh as Margaret Nicholson. Her father was from the Isle of Lewis, and her mother is half-French, half-Berber from North Africa. At the age of fifteen she left school and started to work as a dancer at the Windmill Theatre. Her first singing engagement was in a strip club in Manchester at the age of sixteen. At about that time she became obsessed with jazz, and sang with bebop pianist Dennis Rose. From then on she sang in pubs, clubs, hotels, and in dance bands with some of the finest jazz musicians around. In the midst of all this she worked abroad for a year as a dancer (including a six-month stint at the Moulin Rouge in Paris).[citation needed]

In 1968, she went to London and joined (as Maggie Nichols) an early improvisational group, the Spontaneous Music Ensemble, with John Stevens, Trevor Watts, and Johnny Dyani, and the group performed that year at Berlin's then new avant-garde festival, Total Music Meeting. In the early 1970s she began running voice workshops at the Oval House Theatre (one of the most important centres for pioneer fringe theatre groups). She both acted in some of the productions and rehearsed regularly with a local rock band. Shortly afterwards she became part of Keith Tippett's fifty-piece British jazz/progressive rock big band Centipede, which included Julie Tippetts, Phil Minton, Robert Wyatt, Dudu Pukwana, and Alan Skidmore. Tippetts, Minton, and Nicols also joined Brian Eley to form the vocal group Voice. Around the same time Nicols began collaborating with the Scottish percussionist Ken Hyder (who had recently moved to London) and his band Talisker.[citation needed]

Maggie Nicols recorded an album with the vocalist Julie Tippetts called Sweet and S'Ours which was an FMP]] import.

By the late 1970s, Nicols had become an active feminist, and co-founded the Feminist Improvising Group, which performed across Europe, with Lindsay Cooper. She also organised Contradictions, a women's workshop performance group that began in 1980 and dealt with improvisation and other modes of performance in a variety of media including music and dance. Over the years, Nicols has collaborated with other women's groups, such as the Changing Women Theatre Group, and even wrote music for a prime-time television series, Women in Sport.

Nicols has also collaborated regularly over the years with Swiss pianist Irene Schweizer and French bassist Joelle Leandre, including tours and three recordings as the trio "Les Diaboliques". Her collaboration with Ken Hyder also continues; the duo incorporate elements of the traditional tunes of their shared Scottish background into jazz improvisations in their most recent project, Hoots and Roots Duo. She has worked with pianists Pete Nu and Steve Lodder, with her own daughter, Aura Marina, with avant-gardists Caroline Kraabel and Charlotte Hug, and with lighting designer Sue Neal in Light and Shade. She performed internationally for several decades, including the Zürich and the Frankfurt "Canaille" festivals, the Victoriaville Festival. She gave solo performances at the Moers Music Festival, the Cologne Triennale, and a number of other creative and improvised music festivals."

"Joëlle Léandre is a famous French Bassist and is known for her collaborations with other musicians in the field of improvised music. Born in France on September 12th, 1951, she made her music debut in 1984 with Les Douze Sons. Her childhood was filled with music, and she was particularly interested in the piano during her early years. In her later years, she developed an interest in double bass, which won her many honors and scholarships during her education. Her double bass teacher Pierre Delescluse encouraged her to apply to the Conservatoire National Superieur de Musique de Paris, where she was formally trained and noticed for her talent in the bass. Her outstanding musicianship took her to the United States and to the Centre for Creative and Performing Arts in Buffalo through a scholarship. In the United States, she expanded her network and met some of the best composers, such as John Cage, Giacinto Scelsi, and Morton Feldman. Among them, John Cage greatly influenced her music and compositions. Her time in the United States also enabled her to experience downtown New York music, which was another significant influence that led to her continued involvement in the field of improvised music.

Some of her notable collaborations in the field of contemporary music are with Pierre Boulez, Merce Cunningham, John Cage, and Giacinto Scelsi. Among them, John Cage and Giacinto Scelsi were the biggest influences in her life and music. In an interview, Joëlle Léandre said that John Cage was her spiritual father and changed her perception of sound and music. In another interview, she tells how Giacinto Scelsi allowed her to discover her own music and how his music transported her into a new world of improved consciousness. In the field of jazz music, she collaborated with Derek Bailey, William Parker, and Sebi Tramontana. Her music was owned and distributed by different music labels, including FMP, Leo, RougueArt, and Red Toucan. Some memorable songs and albums she released throughout the years include Instant Replay, Les Douze sons, Trios, Sweet Zee, Frerebet, Joelle et Tetsu, Philippe Fenelon, Voyages, etc. Some of the recent releases include Can You Hear Me and Unleashed. She has also performed live at the Tampere Jazz Festival twice, where popular international artists compete with each other.

Joëlle Léandre is also the member of European Women's Improvising Group (EWIG). The group evolved from the Feminist Improvising Group, and Joëlle Léandre joined the group in 1983. In the early 1900s, she co-founded Les Diaboliques with Irene Schweizer and Maggie Nicols, who were her long-time musician friends. Besides that, she also teaches several classes in prestigious universities about contemporary and improvised music. She has lived in France, Germany, and U.S during her lifetime, teaching at academic institutions in the religions and playing concerts. In 2002, she was invited to Canada as a visiting professor for music and composition."