"Jakob Ullmann (born 12 July 1958 in Freiberg, Germany) is a German composer and university professor. He is the son of theologian and politician Wolfgang Ullmann.

After refusing to undergo military service in East Germany, Ullmann worked as groundskeeper, boilerman and house painter from 1978 until 1982 in Dresden. From 1979 until 1982 he studied church music in Saxony. Being denied official enrollment in Berlin's Academy of Fine Arts, he studied composition privately with Friedrich Goldmann.

Since the early 1980s he has been working as a freelance composer and author of self-published writings, as well as teaching classes at different universities on New Music, mediaeval music, history of Byzantine music as well as music philosophy. His first major presentation in concert was in East Berlin in 1986, receiving positive reviews as well as a first official publishing deal for his string quartet's score in print. In 1988 a work by Ullmann saw its first performance in West Germany when Gruppe Neue Musik Hanns Eisler guested at the Donaueschingen Festival."

"Dafne Vicente-Sandoval, born in Paris in 1979, is a bassoon player who explores sound through improvisation, contemporary music performance and sound installations. Her instrumental approach is centred on the fragility of sound and its emergence and development within a given space. In a concert situation she seeks to create a parodoxical presence of vulnerability and strength by testing the limits of control and instability. A key aspect in her work is the deconstruction of her instrument. She amplifies fragments through miniature microphones mounted inside the instrument. This exploded version of her sound sometimes meets more conventional bassoon playing to generate aural discontinuities between the exterior and the interior, the whole and the parts, wood and electricity - a "reverse-engineered emergence". Dafne Vicente-Sandoval currently lives in Paris and works mainly everywhere else. She favours long-term face-to-face collaborations within which her work keeps an integrity while engaging in a dialogue with that of others. Current projects with Klaus Filip, Bonnie Jones, Pascal Battus, Jakob Ullmann, Éliane Radigue and Klaus Lang. Her work has been presented at contemporary music festivals (Huddersfield Contemporary Music Festival, England; Blurred Edges, Hamburg; Visiones Sonoras, Mexico), festivals of improvised music (Konfrontationen, Austria; No Idea, Texas) and sound art fetsivals (Tsonami, Chile)."

Antonio Pellegrini is an Italian violinist and author based in Genoa. He is the founder and first violinist of the Pellegrini Quartet, established in 1989 in Freiburg im Breisgau. The quartet is known for its diverse repertoire, spanning from Renaissance and Baroque to contemporary compositions, and has collaborated with composers like Klaus Huber and Salvatore Sciarrino. In addition to his musical career, Pellegrini writes music essays published by Italian publishers such as Arcana and Diarkos.

Antonio Pellegrini is an Italian violinist and author based in Genoa. He is the founder and first violinist of the Pellegrini Quartet, established in 1989 in Freiburg im Breisgau. The quartet is known for its diverse repertoire, spanning from Renaissance and Baroque to contemporary compositions, and has collaborated with composers like Klaus Huber and Salvatore Sciarrino. In addition to his musical career, Pellegrini writes music essays published by Italian publishers such as Arcana and Diarkos.

Thomas Hofer is an accomplished violinist and a member of the Pellegrini Quartet. The quartet has been recognized for its performances of both classical and modern works, including compositions by Morton Feldman and Luigi Nono. Hofer's contributions have been integral to the quartet's exploration of contemporary music.

Helmut Menzler is a German cellist renowned for his work in chamber music. He is a member of the Pellegrini Quartet and has collaborated with various ensembles, including the Ravinia Trio and The Turfan Ensemble. Menzler's performances encompass a wide range of styles, from classical to electronic and soundtrack genres.

"Dafne Vicente-Sandoval, born in Paris in 1979, is a bassoon player who explores sound through improvisation, contemporary music performance and sound installations. Her instrumental approach is centred on the fragility of sound and its emergence and development within a given space. In a concert situation she seeks to create a parodoxical presence of vulnerability and strength by testing the limits of control and instability. A key aspect in her work is the deconstruction of her instrument. She amplifies fragments through miniature microphones mounted inside the instrument. This exploded version of her sound sometimes meets more conventional bassoon playing to generate aural discontinuities between the exterior and the interior, the whole and the parts, wood and electricity - a "reverse-engineered emergence". Dafne Vicente-Sandoval currently lives in Paris and works mainly everywhere else. She favours long-term face-to-face collaborations within which her work keeps an integrity while engaging in a dialogue with that of others. Current projects with Klaus Filip, Bonnie Jones, Pascal Battus, Jakob Ullmann, Éliane Radigue and Klaus Lang. Her work has been presented at contemporary music festivals (Huddersfield Contemporary Music Festival, England; Blurred Edges, Hamburg; Visiones Sonoras, Mexico), festivals of improvised music (Konfrontationen, Austria; No Idea, Texas) and sound art fetsivals (Tsonami, Chile)."

"Helena Winkelman (born 27 February 1974) is a Swiss-Dutch composer and violinist. She has won the Andrea Postaccini Italian violin competition and the Walther Bringolf Award for Chamber Music of the Music Academy of Heidelberg-Mannheim. The violin she uses was made by Francesco Rugeri in 1687."