Born in Berlin, von Dadelsen spent his childhood in Tübingen and Hamburg, where he studied at the Hamburg Musikhochschule after graduating from high school. He studied composition and music theory with Diether de la Motte and György Ligeti as well as music education with Hermann Rauhe. At the Darmstadt Holiday Courses in 1972, in a lecture entitled 'Tendenzen zu einer neuartigen Tonalität', he suggested a thorough turnaround of modernism, also pointing to "Pop Art" and new "Romanticism", thus also initiating a number of misunderstood and by many other composers taken up changes in the stylistics of the 1970s. As a composer, he himself took up influences from Pop Art and American stylistics at an early stage and distinguished himself above all in the field of polyrhythmic. Inventions and iridescent harmonic concepts. From 1980 onwards Dadelsen gradually developed a consistently polyrhythmic style together with the composer Babette Koblenz. A series of works for orchestra, music theatre and chamber ensemble as well as conceptual solo works were created. As an author, Dadelsen has published numerous essays in the field of cultural philosophy as well as analyses and studies on rhythm theory and studies on the work of Bob Dylan, Steve Reich, György Ligeti and Wilhelm Killmayer. In 1986–94, he worked as a lecturer at the Darmstadt Summer Courses. In 1998-2004 followed the direction and conception of the Hamburg chamber music festival "P0P - Pur oder Plus"; In 1999 together with Manfred Reichert he led the conception and direction of the Karlsruhe Bob Dylan Festival "Beethoven listens to Bob Dylan". Among his awards are the Berliner Kunstpreis in the music category and the Villa Massimo as well as the scholarship of the in Bamberg. From 2007 until his retirement in 2014, von Dadelsen worked as a music teacher at the Hegau-Gymnasium Singen, where he also led the Big Band. Von Dadelsen lived in Wendland in Clenze.
*Blowing through the letters for Akk, Kl, Str. Qu. and tape
* Von der Wirklichkeit hinter den Grenzen, for Akk., Kl, Str. Qu. and tape
Publications
Was macht Dionysos im Matriarchat? Essay zum aktuellen Komponieren
Eine neue Stufe rhythmischer Wechselwirkungen
Entropie und Systemsprung im musikalischen Organismus
Rhythmische Wechselwirkungskräfte – Musikalische Indizien der Chaostheorie?
Bob ylan oder die Umkehr von Bab-Ylon
Einstein, Dylan und der Gesang der Synagoge
Maskierter Kult und demaskierte Kultur. Steve Reich: Tehillim
Diesseits und jenseits von Raum und Zeit: Steve Reichs „Different Trains“
Über die musikalischen Konturen der Entfernung ; Vom Pathos des Individuellen und seiner Demaskierung
Entgrenzung und Besinnung statt Bekränzung und Bestimmung—Wilhelm Killmayers Hölderlin-Zyklus, veröffentl. in Jahrbuch der Bayerischen Akademie 1998 und andere.
