Composers
All
Ballet
Cantata
Chamber
Choral Music
Concerto
Instrumental
Madrigal
Mass
Music for lute, mandolin and guitar
Opera
Opera buffa
Operetta
Oratorios
Orchestral
Organ
Piano music
Quartet
Quintet
Sacred music
Singspiel
Sonata
Suite
Symphony / Symphonic music
Violoncello music
Vocal & Symphonic
Vocal and instrumental music
A
Alfredo Rolando Ortiz
(1946 )
Anna Amalia of Prussia
(1723 - 1787)
B
Betty Olivero
(1945 )
C
Carl Orff
(1895 - 1982)
Claus Ogermann
(1930 )
D
Diego Ortiz
(1510 - 1570)
Dustin O'Halloran
(1971 )
F
Fernando Obradors
(1897 - 1945)
Frederick II (King of Prussia)
(1712 - 1786)
G
George Onslow
(1784 - 1853)
Giuseppe Maria Orlandini
(1676 - 1760)
H
Hans Otte
(1926 - 2007)
Henrik Otto Donner
(1939 - 2013)
J
Jacob Obrecht
(1548 - 1505)
Jacques Offenbach
(1819 - 1880)
James Oswald
(1710 - 1769)
Johann Christoph Oley
(1738 - 1789)
Johannes Ockeghem
(1425 - 1497)
John Clerk of Penicuik
(1676 - 1755)
Julián Orbón
(1925 - 1991)
L
Leo Ornstein
(1893 - 2002)
M
Maurice Ohana
(1913 - 1992)
Messiaen Olivier
(1908 - 1992)
N
Nikolai Obukhov
(1892 - 1954)
O
Oginsky Michał Kleofas
(1765 - 1833)
Ole-Henrik Moe
(1920 - 2013)
Oliver Knussen
(1952 )
Orazio Benevoli
(1605 - 1672)
Orazio Benevolo
(1605 - 1672)
Orazio Vecchi
(1550 - 1605)
Oreste Ravanello
(1871 - 1938)
Orlando Gibbons
(1583 - 1625)
Oscar Esplá
(1886 - 1976)
Oscar Strasnoy
(1970 )
Oskar Lindberg
(1887 - 1955)
Oskar Merikanto
(1868 - 1924)
Oskar Sala
(1910 - 2002)
Osvaldo Golijov
(1960 )
Oswald von Wolkenstein
(1377 - 1445)
Othmar Schoeck
(1886 - 1957)
Otto Ketting
(1912 - 1980)
Otto Nicolai
(1810 - 1849)
Otto Olsson
(1879 - 1964)
Ottokar Nováček
(1866 - 1900)
Ottorino Respighi
(1879 - 1936)
P
Pauline Oliveros
(1932 - 2016)
Pierre-Octave Ferroud
(1900 - 1936)
Prince Johann Ernst of Saxe-Weimar
(1696 - 1715)
S
Sebastian Ochsenkhun
(1521 - 1574)
T