The Ocean Betrayed (Das verratene Meer)
1989 Music theatre Opera
Ode al dodicesimo apostolo
Chamber music Keyboards 1996
Ode to an Aeolian Harp (Ode an eine Äolsharfe)
1986 Concert
Ode to the West Wind (Ode an den Westwind)
1953 Concert
Oedipus the Tyrant (Ödipus der Tyrann)
Incidental music Withdrawn 1983
Olly on the Shore
2001 Chamber music Keyboards
Once and Now (Ehmals und jetzt)
1961 Vocal pieces Chamber music Keyboards
Ondine (Undine)
1957 Music theatre Ballet
First suite from the ballet "Ondine" (Undine)
1958 Orchestral and ensemble works
Second suite from the ballet „Ondine“ (Undine)
1958 Orchestral and ensemble works
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