Professor and Lecturer

Faculty member — Philadelphia Conservatory of Music, 1935–42, Mannes School of Music, 1940–44, Juilliard School of Music, 1943–55, Columbia University, 1953–55, University of California, San Diego, 1966–72; Visiting Professor — Washington University, 1963–64, Life Fellow — St Hilda’s College, Oxford University, 1975; Visiting Fellow — Wolfson College, Oxford University, 1978, University of Maryland, 1981–85; Yale University, 1991–93, Regents Lecturer — University of California, 1995, Lecturer — Boston University, 1993–94, Smithsonian institution, 1994, University of California, Santa Barbara, 1995, Hebrew University, Israel, Royal Institution of Great Britain, London, 1993–94, University of Southhampton, Oxford University, 1993, 10th international Congress of Logic. Methodology and Philosophy of Science, Florence, Italy, 1995, various educational institutions U.S, England, Spain, Denmark, Netherlands, Canada, Israel, Brazil, Argentina, Chile; Annual Master Classes — Oxford University, 1955–, Institute for Advanced Musical Studies, Oxford, 1997–.