Klaus Lang studied composition, music theory and organ at the Kunstuniversität Graz under Hermann Markus Pressl, Beat Furrer and Younghi Pagh-Paan.
He has taught composition at the Impuls Academy in Graz, the Nordic Musik Days in Reykjavik, the Moscow Contemporary Music Ensemble Academy and the Darmstadt Summer School. Since 2006, he has been a professor at Graz's Kunstuniversität.
His catalogue includes numerous solo pieces, notably for organ, pieces for ensemble and orchestra, vocal works and several operas.
Klaus Lang has received commissions from a number of festivals, including: Wien Modern, ECLAT (Stuttgart), Lucerne Festival, Wittener Tage für neue Kammermusik, Ultraschall Berlin, Musiktriennale Köln, Darmstardt Ferienkurse, Musikmonat Basel, Osterfestival Innsbruck, Biennale München, New Music Festival (Stockholm), Monday Evening Concerts (Los Angeles), Takefu Festival (Japan).
His works have been performed by the Klangforum Wien, the Arditti Quartet, the Ensemble intercontemporain, Musikfabrik, the ŒMN (Österreichisches Ensemble für neue Musik), Die Reihe, the Nieuw Ensemble Amsterdam, the SWR Vokalensemble Stuttgart, the Studio Percussion Graz, the Recreation Orchester, the Tehran Symphony Orchestra, the hr-Sinfonieorchester and the Rundfunk-Sinfonieorchester Berlin.
Klaus Lang also has a career as an organist, performing a repertoire of early and contemporary music and improvised music.
