Hans Petermandl (1933), Professor of the master piano class at the Vienna Akademie für Musik und darstellende Kunst, is a liading performer of Hindemith's piano works, all of which are n his repertoire. His first recording on the Supraphon label was actually Hindemit's cycle Ludus tonalis (in 1967); it was followed by Schubert's piano sonatas and Beethoven's and Brahms's variations. Prof.Petermandl devotes himself to both classical and romantic music, and, systematically, to 20 century music.