"Reinhold Friedl, born 1964, lives in Berlin since 1987. He studied piano with Renate Werner, Alan Marks and Alexander von Schlippenbach, mathematics and musicology in Stuttgart and Berlin. As a performer, interpreter and composer, he has received various fellowships - Eurocréation Paris, the Rome Fellowship (Villa Serpentara) of the Berlin Academy of Arts, STEIM Amsterdam-, as well as various composition commissions. Reinhold Friedl has published articles in newpapers and professional journals and conducted a seminar on "Music and Mathematics" in the department of Mathematics at the Berlin Free University together with Prof. Behrends. He founded and directs the ensembles Piano-Inside-Out and ZEITKRATZER. Friedl has worked as a curator for the Podewil center for contemporary arts Berlin and directed the Off-ICMC (International Computer Music Conference) Berlin 2000. He has been invited to take part in the Jury of the Ars Electronica and Gulbenkian Foundation, Lisboa. As pianist and composer, he has worked with musicians and composers such as Lee Ranaldo (Sonic Youth), Phill Niblock, Helmut Oehring, Nicolas Collins, Lou Reed, MERZBOW a.k.a., Masami Akita, Radu Malfatti, Bernhard Guenter, Mario Bertoncini (nuova consonanza), Keiji Haino, and has made countless radio and CD recordings. Lately he realized the "spazialisation piano-project" at ZKM Karlsruhe and Asphodel Studios in San Francisco. The main focus of Reinhold Friedl's work is the inside-piano. He played all respective literature using inside-piano techniques and released several articles in this field."

"Martin Siewert (born 11 May 1972) is a German guitarist and film composer.

Siewert has been living in Vienna since the age of 10. He studied guitar at the University of Music and Performing Arts Graz. As a guitarist, he started his public performances in 1995. In his early performances, he played with Herwig Gradischnig, Freier Fall, Franz Hautzinger, and his band Duckbilled Platypus. With this band, he recorded two albums for the label Extraplatte.

He began to separated himself from the jazz idiom and developed an abstract sound on guitar. He became a member of Efzeg with Burkherd Stangl and Hauf and Komfort. He invited Dafeldecker, Hinteregger, Wayne Horvitz and Tony Buck to the group Komfort. In the group Trapist, he played with Joe Williamson and Martin Brandlmayr. On My Kingdom for a Lullably, he played with Christof Kurzmann, Axel Dšrner, and Billy Roisz, the video artist of Efzeg. He was a member of the guitar quartet SSSD with Taku Sugimoto, Werner Dafeldecker, and Burkhard Stangl.

He has worked with Oskar Aichinger, Christian Fennesz, Wolfgang Mitterer, Elliott Sharp, Franz Koglmann, Thomas Lehn, Karlheinz Essl, Ken Vandermark, Michael Sarin, Jamaaladeen Tacuma, Kammerflimmer Kollektief, Georg GrŠwe, Frank Gratkowski, Michael Vatcher, and Klangforum Wien. He has composed music for, ballet, film, theater, remix recordings, and sound art."