"Born Lucerne, 1952; saxophones, composer.

Urs Leimgruber has been active for many years in the areas of contemporary improvisation, composition, jazz and new music. One of his earliest associations was as a member of the electric jazz/free music group 'Om' with Christy Doran, Fredy Studer and Bobby Burri, and he later formed the 'Reflexionen' quartet with Don Friedman and Bobby Burri in New York. More recently, his own projects have included 'Ensemble Bleu', 'Xylem', e_a.sonata 02 with the ARTE saxophone quartet, as well as a long association with Fritz Hauser: as a duo with the ongoing Music for saxophone and percussion; in the Leimgruber/Roidinger/Hauser trio; a trio with Joëlle Léandre; and a trio with Marilyn Crispell. He later formed the 'quartet noir' with Marilyn Crispell, Joëlle Léandre and Fritz Hauser, a trio with Jacques Demierre and Barre Phillips and the group SIX with Jacques Demierre, Isabelle Duthoit, Charlotte Hug, Dorothea Schürch and Thomas Lehn. Urs Leimgruber has also performed extensively as a solo artist and has been involved in mixed media presentations, providing music for dance, radio plays and film.

Urs Leimgruber has undertaken concert tours in Western and Eastern Europe, USA, Canada, South America and Japan, and appeared at concerts and on recordings with such musicians as Steve Lacy, Fred Frith, Evan Parker, Joe McPhee, Lauren Newton, Michel Doneda, Keith Rowe, Günter Christmann, Sunny Murray and Günter Müller among many others."

"Axel Dörner (born 26 April 1964 in Cologne, Germany) is a German jazz musician (trumpet and piano) and composer.

Dörner studied piano in the Dutch town Arnhem (1988-89) and at the Music Academy in Cologne (1989-1996). From 1991 he studied trumpet with Malte Burba, and during his studies he collaborated with trumpeter Bruno Light in the "The Street Fighters Duo". At this time he also joined the ensembles "The Street Fighters Quartet" and "The Street Fighters Double Quartet" together with Matthias Schubert, Bruno Leicht, and Claudio Puntin. In addition the "Axel Dörner Quartet" was initiated (with Frank Gratkowski, Hans Schneider and Martin Blume). With saxophonist Matthias Petzold. he participated on the albums Lifelines and Psalmen Und Lobgesänge.

Dörner has resided in Berlin since 1994, and occurs in the most diverse settings like "The London Jazz Composers Orchestra" and with "Hedros" (together with Mats Gustafsson, Günter Christmann, Barry Guy and others). Since then he has contributed on more than 50 album recordings.

Dörner is distinguished mainly by his versatility. He bouth play the more traditional Bebop, just like he fits in to classic Free Jazz or electronic music. He playd with Otomo Yoshihide at the Donaueschinger Musiktage in 2005. Dörner play both solo concerts and collaborates with his trio "TOOT" (together with Phil Minton and Thomas Lehn) and "Die Anreicherung" with Christian Lillinger, Håvard Wiik and Jan Roder, and in Ken Vandermarks "Territory-Band". Dörner is an integral part of the Berlin scene of experimental new improvisational music. Dörner was given special attention for his interpretation of all compositions by Thelonious Monk, with the pianist Alexander von Schlippenbach and his own band "Die Enttäuschung" released on a three CD album (Monks Casino, Complete 2005)."-Wikipedia

"Roger Turner (born 1946, Whitstable, England) is an English jazz percussionist. He plays the drumset, drums, and various percussion, and was brought up into the jazz and visual art cultures inhabited by his older brothers, playing drums from childhood in informal jazz contexts.

Turner studied English literature and contemporary philosophy at Sussex University, playing with Chris Biscoe for the British Council in 1968, a first concert in improvisation. His move to London gave him contact with the first and second generation improvisers and he began to play primarily with Lol Coxhill, Gary Todd, John Russell, Hugh Davies, Steve Beresford, and Phil Minton.

In the years immediately after 1974 his work was primarily concentrated on opening the way to a more personal percussion language. This was also a period of intense collaborations that structured many of his future approaches to music-making and saw the formation of two long-lasting acoustic duos with Phil Minton and with John Russell. Recordings of these duos document an extreme attention to timbre and pitch, as well as a constantly shifting speed that typified much of his work at the time. The duo with Minton toured extensively throughout Europe, USA and Canada.

In 1979 he established CAW records with John Russell and Anthony Wood, and recorded the solo album The Blur Between focussing on single surface improvisations: a linear and reduced equipment approach he had started using with Carlos Zingaro and others in live performances.

In addition to forming Trump music with Gary Todd to promote improvised music in London, he also involved himself in formative activities of the London Musicians Collective during this period. He was awarded Arts Council of Great Britain bursaries for solo percussion in 1980, and in 1983 for investigation into percussion with electronics. Extensive festival and club solo work followed, including the Bracknell Jazz Festival and the Brussels Festival of Percussion.

In 1982 the trio The Recedents was formed with Lol Coxhill and Mike Cooper exploring the possibilities of electro-acoustic music, in which Turner initially played drumset and EMS Synthi A as a means of bending the sounds of various metal percussion instruments. This group, still existing, mixes song, jazz, punk/thrash, with acoustic detail in always shifting sonorities, and has worked throughout Europe, Canada and the UK, also recording for the French Nato label. Involvements with experimental rock musics and open-form song included extensive work in duo with Annette Peacock 1983-5, with whom he toured in Europe and Scandinavia. They recorded the album I have no feelings for Ironic.

In 1984-5, he was invited for workshop residences at Alan Silva's Institute Art Culture Perception in Paris, where long-term collaborations with Alan began, culminating in The Tradition Trio with Johannes Bauer. This group was central to his explorations of forms of free jazz, an interest that has seen him working with musicians on both sides of the Atlantic (including Elton Dean, Irene Schweizer, Cecil Taylor, Roy Campbell, Henry Grimes, The Wardrobe Trio and Charles Gayle).

Since the early 1980s his work has focussed on numerous projects with improvising musicians and groups, touring Europe, Australia, USA and Canada. Perhaps the most important of the later groups would be Konk Pack, formed in 1997, with Tim Hodgkinson and Thomas Lehn, a group whose use of volume and sense of detail continues the exploration of an electro-acoustic dynamic that forms one of his main musical concerns. This group has toured extensively in Europe and USA.

He forged working relationships with Japanese musicians over the years: in the 1980s with Toshinori Kondo in the trio with John Russell, but since the mid-1990s in concerts and recordings with guitarist Kazuhisa Uchihashi in Austria, Japan, and U.K, and in the recent (2009) Hana-Bi three-day event in London that included the guitarist and the pianist Chino Shuichi.

An active involvement in visual art has always been in dialogue with his music, and an inspiration for it. In the forefront of this is his work with Susan Turcot (the investigation/documentation of music and sound-drawing both in Europe and Canada-including the Being Rich box collection --, and music for her 2008 animation film Bitumen, Blood, and the Carbon Climb.

His music for dance/performance includes work with Alexander Frangenheim's Concepts of Doing, Stuttgart ; Carlos Zingaro's Encontros projects in Lisbon and Macau; and most recently in the Josef Nadj production etc.etc. (premiered Vandeouvre, France, 2008) and which is a continuing involvement.

In March 2009 he was invited to travel and perform on the Arctic island Svalbard, and was also invited to attend and play in the Comprovise event in Cologne, Germany in June 2009, set up to examine any possible relationship between improvisation and composition.

Turner's music-making with international improvisers in ad hoc and group collaborations have since the 1970s to the present day included Toshinori Kondo, Derek Bailey, Fred Frith, Evan Parker, William Parker, Cecil Taylor, Otomo Yoshihide, Shelley Hirsch, Joelle Leandre, Keith Rowe, Ab Baars, Barry Guy, Barre Philips, Henry Grimes, Paul Rutherford, Gunter Christmann, Marilyn Crispell, Irene Schweizer, Frederik Rzewski, and Malcolm Goldstein."

"AKA Oliver Schwerdt (born 13 November 1979) is a German musicologist and musician (piano, percussion) in the field of free improvisation.

Born in Eisenach, Schwerdt attended school in Eisenach until his university entrance qualification and received classical piano lessons at the municipal music school there. He did his military service as a piano accompanist in the training music corps of the German armed forces. He began his studies of music and cultural sciences as well as art history at the Leipzig University in 1999 and completed them in 2006 with a master's thesis on Georg Simmel and Dadaism submitted to Klaus Christian Köhnke [de]. In 2012 he received his doctorate from Sebastian Klotz at the Institute for Musicology at the University of Leipzig [de], for which he also worked as a lecturer. His dissertation focuses on the musical strategies of central actors in the scene of free improvised music in the wake of Free Jazz and their spatial theoretical interpretation. He has taught at the Museum of Musical Instruments of Leipzig University and with the Bauhaus Dessau Foundation.

From his musicological work, Schwerdt identified the challenge facing contemporary museum practice in relation to the "reinvention of the drum set combination" as they are "in European improvised music" of the 20th century became reality. He is committed to securing the "acutely endangered, historically so delicate, aesthetically highly fascinating and epistemologically valuable object complexes". the first generation of European free jazz or contemporary improvised music. As an author of music-critical articles, Schwerdt wrote for the Neue Musikzeitung, the Jazzthetik [de] and the Jazzzeitung [de], among others. He also wrote accompanying texts for albums by Günter Sommer/Wadada Leo Smith and Alexander von Schlippenbach/Evan Parker/Paul Lovens and Urs Leimgruber. In 2003 he founded the publishing house Euphorium Productions.

Since 1999 Schwerdt has been artistic director of the EUPHORIUM_freakestra, a project ensemble between contemporary improvisation, jazz, Neue Musik and theatre with Günter Sommer, Friedrich Schenker, Rudi Mahall, Paul Rutherford, Ernst-Ludwig Petrowsky, Frank Möbus, Wadada Leo Smith, Axel Dörner, Barre Phillips, Alexander von Schlippenbach, Evan Parker, Paul Lovens, Sven-Åke Johansson, Ulrich Gumpert, Manfred Hering, Dietmar Diesner, Roger Turner, Barry Guy, Akira Sakata and others worked together. At the 2009 33. Leipziger Jazztage, he performed with the project Transatlantic Freedom Suite Tentets at the Leipzig Opera.

From the project ensemble the quartet ember with Urs Leimgruber developed, Alexander Schubert and Christian Lillinger. From 2006 to 2016 Schwerdt worked with Lillinger and Petrowsky in the New Old Luten Trio. The recording of Petrowsky's late works, documented from 2013 to 2015 with the albums Tumult!, Krawall!, Rabatz! in a quintet formation expanded by the double bassists John Edwards and Robert Landfermann received great attention. With Schubert and Friedrich Kettlitz, Schwerdt operates the electrified Noise-Ensemble trnn.

In 2006, Schwerdt received the Leipzig Jazz Young Talent Scholarship of the Marion-Ermer-Foundation for his performance as pianist and ensemble leader. The critics Ken Waxman (Jazzword) and Rigobert Dittmann (Bad Alchemy) hear reminiscences of Oscar Peterson, Bill Evans, Cecil Taylor and Alexander von Schlippenbach in Schwerdt's piano playing.

Schwerdt uses the following pseudonyms: Edithrakneff Weinermond, Frautastem!, Ingrid Ingulfwieher, Rita Deixis, Solveig Reberp-Klamt and Elan Pauer."