They are heard on the soundtrack of the 1990 film Henry & June, playing Debussy's Petite Suite.
Frans Alfons Janssens | Aloys Hirt | Alfons Verplaetse | Alfons Benedikter | Aloys Ndimbati | Aloys and Alfons Kontarsky | Alfons von Czibulka | Alfons Rebane | Alfons Karpiński | Alfons de Tous | '''Alfons and Aloys Kontarsky''' performing Karlheinz Stockhausen |
In addition, he participated in several contemporary opera productions, including The Walls (Die Wände ) by Adriana Hölszky, conducted by Alfons Kontarsky (Frankfurt); and the first performance of Arnold Schoenberg's The Lucky Hand (Die glückliche Hand, in an arrangement for chamber orchestra) by the United Ensemble Berlin, conducted by Peter Hirsch.