On Wikipedia https://en.wikipedia.org/wiki/Asko/Schönberg
Alternative Spellings Asko-Schönberg Ensemble, ASKO Ensemble
Creation 1965
City Amsterdam, Netherlands
Country Netherlands
Links Allmusic

Formed in 1965 and based in Amsterdam, the Asko Ensemble performed regular concerts along with film music programs, dance and multimedia projects, and modern opera. The ensemble was conducted the first five years by Jan Vriend and subsequent working with Cliff Crego. Riccardo Chailly, Oliver Knussen, Reinbert de Leeuw, George Benjamin, Stefan Asbury, and Peter Rundel. wikipedia