Thomas Demenga: violoncello, Asako Urushihara: violin, Teodoro Anzellotti: accordion, Aurele Nicolet: flute, Heinz Holliger: oboe, Hansheinz Schneeberger: violin, Thomas Larcher: piano

Alexander Lonquich: piano, Auryn Quartet, Ora Rotem Nelken: piano

Arditti Quartet [Irvine Arditti: violin, Graeme Jennings violin, Garth Knox: viola, Rohan de Saram: cello], Dietrich Fisher-Dieskau: speaker

"...über ein Verschwinden(3rd String Quartet)
Klangschatten
""...fragment..."" Five Epigrams for String Quartet (2nd String Quartet)
Introspezione, Documentation for String Quartet (1st String Quartet)
""...sich verlierend"" for String Quartet and Speaker (4th String Quartet)"

Frances-Marie Uitti: violoncello, Paul Griffiths: voice

Dietburg Spohr: mezzosoprano, Brigitta Zehetner: mezzosoprano, Andrea Baader: soprano, Rita Huber: soprano, Dzuna Kalnina: alto, Rica Rauch: alto

Erich Hobarth: violin, Thomas Demenga: violoncello, Thomas Larcher: piano