"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)."