"Jürg Frey was born in 1953 in Aarau, Switzerland. Following his musical education at the Concervatoire de Musique de Genève, he turned to a career as a clarinetist, but his activities as composer soon came to the foreground. Frey developed his own language as a composer and sound artist with the creation of wide, quiet sound spaces. His work is marked by an elementary non-extravagence of sound, a sensibilty for the qualities of the material, and precision of compositional approach. His compositions sometimes bypass instrumentation and duration altogether and touch on aspects of sound art. He has worked with compositional series, as well as with language and text. Some of these activities appear in small editions or as artist's books as individual items and small editions (Edition Howeg, Zurich; weiss kunstbewegung, Berlin; complice, Berlin). His music and recordings are published by Edition Wandelweiser. Frey has been invited to workshops as visiting composer and for composer portraits at the Universität der Künste Berlin, the Universität Dortmund and several times at Northwestern University and CalArts. Some of the other places his work has developed are the concerts at the Kunstraum Düsseldorf, the Wandelweiser-in-Residence-Veranstaltungen in Vienna, the Ny music concerts in Boras (Sweden), the cooperation with Cologne pianist John McAlpine, the Bozzini Quartet (Montréal), QO-2 (Bruxelles), Die Maulwerker, incidental music, as well as the regular stays in Berlin (where during the last years many of his compositions were premiered). Frey is a member of the Wandelweiser Komponisten Ensemble which has presented concerts for more than 15 years in Europe, North America and Japan. Frey also organizes the concert series moments musicaux aarau as a forum for contemporary music."

Hélène Fauchère is a French vocalist known for her work across contemporary classical music, experimental repertoire, and interdisciplinary projects. With a background in both opera and avant-garde performance, she explores the expressive and textural extremes of the voice, collaborating frequently with composers and ensembles engaged in new and exploratory music.

Swiss-born Géraldine Keller is an improvising vocalist and interpreter of contemporary music whose work spans concert performance, staged works, and electroacoustic collaboration. Her practice focuses on extended vocal techniques, the relationship between text and sound, and close work with composers creating new repertoire for the voice.

Martine Altenburger is a French cellist active in contemporary composition, free improvisation, and electroacoustic performance. A co-founder of ensemble]h[iatus, she is known for her refined tone, sensitivity to timbre, and deep engagement with experimental forms, performing widely with composers and improvisers throughout Europe.

Italian violinist and performer Tiziana Bertoncini works at the intersection of contemporary classical music, improvisation, and multimedia projects. Equally comfortable with notated scores and spontaneous creation, she collaborates with leading experimental ensembles and is recognized for her nuanced, exploratory approach to sound and gesture.

Fabrice Charles is a French trombonist active in contemporary music, improvisation, and cross-disciplinary performance. He is known for his command of extended techniques, microtonal detail, and timbral exploration, contributing to projects ranging from chamber ensembles to experimental large-scale works across Europe.

"Classically-trained Isabelle Duthoit works with various ensembles and composers, primarily in the world of free improvisation. Using her voice, she has developed a unique singing technique, and to that end has sung in improvised solo settings and in duet with Phil Minton. In 2008, she was a resident at the Villa Kujoyama in Kyoto (Japan) to perform a solo vocal performance in relation to the sound world of Noh and Bunraku theater. From 1995 to 2005, she has been committed to the creation and improvised music by creating Fruits Festival Mhère "fields of improvisation" with Jacques Di Donato. Since 1997, she has taught clarinet and improvisation at the Conservatoire Departmental Evry in Essonne, France."

Laurent Guitton is a French tubist whose work ranges from contemporary chamber music to adventurous improvisation. A longtime collaborator within ensemble]h[iatus and other experimental groups, he explores resonance, low-frequency color, and unconventional textures, expanding the tuba's presence in modern repertoire.

"As a classical trained percussionist, Lê Quan Ninh worked with contemporary music ensembles and was a founder member of Quatuor Hêlios (1986-2012), a percussion quartet that performed and recorded, among others, John Cage's percussion works. Their last creation was Seul à Seuls by Georges Aperghis premiered in late 2006 at the Musica Festival in Strasbourg (France).

As an improvisor, he participates at numerous meetings in Europe and in North America and plays regularly in ensembles in forms that mix improvised acoustic & electroacoustic music, 'performance art', dance, poetry, experimental cinema, photography and video.

With the cellist Martine Altenburger, he founded in 2006 the ensemble]h[iatus, a contemporary music ensemble whose its members are at the same time interpreters and improvisers. They commissioned pieces to the composers Vinko Globokar, Peter Jakober, Steffen Krebber, Jennifer Walshe and Anthony Pateras

His discography counts about 40 CD on european and north american labels. The last release (Aplomb, 2015) is a duet with his long term colleague Michel Doneda.

In 2014, he publishes the translation of his book Improvising Freely. The ABCs of an Experience (previously published in french)."

"Thomas Lehn was Born in Fröndenberg (Germany) in 1958. Since the early 1980s Thomas Lehn has been working as a author and performer of contemporary music. After studying recording engineering - piano with Prof. Wilfried Kassebaum - at the Music Academy of Detmold in Germany, studies at the Music Academy of Cologne with Peter Degenhardt and Prof. Klaus Oldemeyer (classical piano) and with Frank Wunsch and Francis Coppieters (jazz piano) completed his academical education. In the 80ies he took part on courses of Studio for pianistic interpretation held by Prof. Jürgen Uhde.

As an interpreting pianist he has been playing concerts since 1982 - performing both contemporary new music including numerous first performances and traditional composed music of the classical and romantical period. In 1989 he initiated the chamber ensemble Trio Dario and four years later the Mengano Quartett, performing compositions of the contemporary avant-garde, in particular numerous first performances of comissioned works. Developed parallel to his work as a pianist, since the early 1990s his major and widely reknown work has been performing and producing live-electronic music. Rooted in the experience of a wide spectrum of musical fields based on his background as an interpreting and improvising pianist in classical-, contemporary and jazz-music and having been involved in numerous other projects like music theatre, dance, multi-media, studio pre-/post-production etc., he has been developing an individual 'language' of electronic music.

The electronic equipment he uses consists of analogue synthesizers of the late 1960s, and since 1994 in particular the EMS Synthi A. Besides the substantial sound qualities of its analogue synthesis, the facilities of this modular instrument - for example to modify electronic sounds very directly as well as to combine and to control several parameters of the sound synthesis at the same time - allows him to spontaneously act in close contact with the various structural degrees of the musical process.

In 2000 his solo album Feldstärken had been released on German label Random Acoustics. Up today, his discography enclosures about 80 CD publications. Numerous appearances at major international festivals of contemporary musics and concerts tours in Australia, Austria, Belgium, Canada, Croatia, Czech Republic, Denmark, England, Finland, France, Germany, Hungaria, Ireland, Israel, Italy, Japan, Lebanon, The Netherlands, New Zealand, Norway, Poland, Portugal, Serbia, Scotland, Slovakia, Slovenia, Spain, Sweden, Switzerland and the USA give evidence of his international profile and recognition.

He has been involved in projects promoted and/or supported by the Goethe-Institutes in Belgrade, Boston, Bratislava, Budapest, Chicago, Copenhagen, Glasgow, Lille, Lissabon, London, Manchester, Marseille, Milano, Montreal, Palermo, Rome, San Francisco, Tel Aviv, Tokyo, Toronto, Warsaw, Wellington and York. His musical activities enclosure long term and newer ensemble collaborations as well as involvements in numerous specific single projects. Long term collaborations are ensembles like KONK PACK, TOOT, THERMAL, FUTCH, MIMEO, SPEAK EASY, 6IX, VARIO-34, as well as the duo works with Marcus Schmickler, Tiziana Bertoncini, Gerry Hemingway, Paul Lovens, Frédéric Blondy Urs Leimgruber and John Butcher. More recently formed ensembles are the duos with Benoît Moreau and with the video artist Kjell Bjørgeengen, trio formations with John Butcher involving pianists John Tilbury and Matthew Shipp.

Further he is pianist and founding member of the ensemble]h[iatus, an ensemble for interpretation and improvisation of contemporary music, whichs members are all experienced interpreters and improvisers. The ensemble compiles concert programs integrating/alternating notated and real-time-created contemporary music. It has been first-performing commissioned works by Vinko Globokar, Peter Jakober, Jennifer Walshe, Anthony Pateras besides performing compositions of the contemporary repertoire. Besides performing his own electronic music, in the recent years Thomas Lehn became more active as a synthesizer interpreter of electronic compositions. The realisation of Boguslav Schaeffer's Electronic Symphony - live performed in 2010 and 2011 - has been documented on the CD PRES Scores on polish label Bolt/Monotype. In 2012 he world premierred OCCAM VI for synthesizer solo by Éliane Radigue at Berghain Berlin during festival Faithful! and - together with KlangForum Wien - dort for synthesizer and 15 piece ensemble by Austrian composer Peter Jakober at musikprotokoll Graz and at Konzerthaus Vienna."

Italian flutist Alessandra Rombolà is a prominent voice in contemporary music and improvisation, noted for her mastery of extended techniques and her work with live electronics, installations, and interdisciplinary performance. Based in Madrid, she collaborates widely with composers, improvisers, and ensembles across Europe.