O'Brien, Richard
O'Brien, Tim
O'Callanain, Niall
O'Carolan, Turlough
O'Connell, Ryan
O'Connor, Ella Yelich
O'Donnell, Daniel
O'Farrill, Chico
O'Gorman, Peter
O'Hara, Geoffrey
O'Hara, Michael
O'Keefe, Laurence
O'Laoire, Lillis
O'Leary, Jessica (editor)
O'Mahoney, Terry
O'Mara, Peter
O'Neal, Barry
O'Neill, Francis
O'Neill, Jackie
O'Neill, Paul
O'Neill, Susan
O'Regan, Tarik
O'Reilly, John
O'Reilly, Kim
O. Gutman
Oakland, Ben
Oare, Michael
OASIS
Oberfeld, Casimir
Oberst, Fritz
Oberthur, Carl
Obijalska, Dorota
Obolskaja N.
Obradors, Fernando
Obrecht, Jacob
Obrovska, Jana
Obst, Michael
Ocampo, Mauricio Cardozo
Ochs, Siegfried
Ockeghem, Johannes
Ockelford, Adam
Oddo, John
Oddone, Edoardo
Odeh-Tamimi, Samir
Odeh-Tamini, Samir
Odell, Tom
Oden, Annette
Odgren, Jim
Odo, Franklin
Odone, Alberto
Oerding, Johannes
Oermann, Nils Ole
Offenbach Jacques
Offenbach, Jacques
Ogarkova N. A.
Oginski Michal
Ogiński, Michał Kleofas
Ogorodnov V.
Ogorodnova Dina Izrailevna
Ogorodnova-Dukhanina Tamara
Ohana, Maurice
Ohse, Reinhard
Oja, Carol J.
Okamoto, Shinsuke
Okazaki, Miles
Okhalova I. - Averjanova O.
Okhalova I. - Korzun K.
Okoshi, Tiger
Okudzhava Bulat Shalvovich
Okunev German
Olah, Tiberiu
Olatunji, Babatunde
Olazabal, Tirso
Oldenkamp, Michiel
Oldham, Arthur
Oldroyd, George
Olias, Lotar
Oliva, John
Olivadoti, Joseph
Oliver, Joseph King
Oliver, Julian
Oliver, Nancy
Oliver, Sy
Olivero, Betty
Olivier, François
Olivieri Sangiacomo, Elisa
Oliviero, N.
Olson, Lynn Freeman
Olson, Robert
Olson, Tawnie
Olsson, Milton
Olusola, Kevin
Omar, Don
Omartian, Michael
Ondrasik, John
Ondrícek, František
Ondruš, Ján
One Direction
One Republic
Ongarello, Antonio
ónis
Ono, Yoko
Onovwerosuoke, Fred
Ónozó János
Onyeji, Christian
Oosterhout, Arjen
Oppo, Franco
Opurina Tamara
Oram, James
Oratovskij A. (ed.)
Orbán György
Orban, Marcel
Orbison, Roy
Orefice, Giacomo
Orefici, Alberto
Oreus V.
Orff, Carl
Oriol, Emmanuel
Orkisz, Andrzej
Orloff-Tschekorsky, Tatjana
Orlov G.
Orlova Darja Sergeevna
Orlowsky, David
Orochko Aleksej
Orologio, Alessandro
Oromszegi Ottó
Orr, Buxton
Orr, J.
Orsi, Romeo
Országh Tivadar
Ort, Jirí
Ortelli, Antonio
Ortiz, Diego
Ortiz, Suzzette
Ortiz-Alvarado, Graciela Paraskevaídis William
Ortolani, Riz
Orton, Beth
Osborn, Brad
Osborne
Osborne, Anthony
Osborne, Nigel
Osborne, Richard
Osborne, Tony
Osbourn, Leslie
Osbourne, Ozzy
Oscar Peterson
Osentowski, Francis
Osgood, Charles
Oshrat, Kobi
Osin I. (ed.)
Oskolkov Sergej Aleksandrovich
Osorio, Nuno
Osovitskaja Z.
Ospald, Klaus
Osse, Klaus
Ostendorf, Jens-Peter
Osterling, Eric
Ostleitner, Elena
Ostransky, Leroy
Ostrovskaja Yanina - Frolova Lyudmila
Ostrzyga, Michael
Oswald, Albert
Oswald, Gerald
Otros, Y.
Ott Rezső
Ott, Daniel
Ott, Eugen
Ott, Karin
Otte, Hans
Otten, Mark
Otterstedt, Annette
Ouzounoff, Alexandre
Ovadia, Moni
Ovcharenko, Halyna
Ovchinnikov Vyacheslav
Overduin, Jan
Overthrow, David
Ovokaitys, Cindy
Owen, Barbara
Owen, Randy
Owen, Teodora
Owen, William
Owenby, Chris
Owens, James T.
Owens, Jessie Ann
Owens, Jimmy
Owens, Matthew
Owens, Terry Winter
Owens, Thomas
Owsinsky, Bobby
Oxa, Anna
Ozi, Étienne
Ozi, Etienne
Ozim, Igor (Hrsg.)
O'Loughlin, Sean (instrumentation by)
O'Loughlin, Sean (arranged by)
O'Neill, Jackie (arranged by)
O'Neill, Norman (edited by)
O'Regan, Noel (edited by)
OASIS (author)
Oberbek, Jan (edited by)
Obst, Michael (arranged by)
Obst, Michael (edited by)
Ocean, Johny (instrumentation by)
Ocker, Marshall (instrumentation by)
Oddo, John (instrumentation by)
Odermatt, Arnold (edited by)
Oechsle, Siegfried (edited by)
Oeser, Fritz (words by)
Oeser, Fritz (transcribed by)
Oeser, Fritz (translated by)
Oeser, Fritz (edited by)
Oesterle, Louis (edited by)
Ofburg (instrumentation by)
Offenbach, Jacques (composer)
Ogonovsky, Margaret (arranged by)
Ohanian, David (arranged by)
Ohmen, Wilhelm (edited by)
Ohmiya, Makoto (edited by)
Oistrach, Igor (piano score by)
Oldenkamp, Michiel (edited by)
Oldman, Cecil B. (edited by)
Oleskiewicz, Mary (edited by)
Oliva, Petr (edited by)
Ollivo, Yann (piano score by)
Olson, Lynn Freeman (arranged by)
Ondra, Jaroslav (arranged by)
Ondrícek, František (transcribed by)
Ongarello, Antonio (arranged by)
Ónozó János (edited by)
Opp, Walter (edited by)
Oppermann, Annette (edited by)
Orbán György (composer-contributor)
Orbán György (edited by)
Orbán György (arranged by)
Orbán György (transcribed by)
Orbán György (edited by)
Orbán György (piano score by)
Orbán Ottó (translated by)
Orbaugh, William (arranged by)
Orel, Alfred (words by)
Orel, Alfred (edited by)
Orenstein, Arbie (edited by)
Orford, John (editor) (edited by)
Orgelbuchkommission Baden, Elsaß, Lothringen und Pfalz (edited by)
Ormay Imre (words by)
Ormay Imre (translated by)
Oromszegi Ottó (edited by)
Orphee, Matanya (edited by)
Országh Tivadar (transcribed by)
Országh Tivadar (transcribed for violin and piano)
Országh Tivadar (compiled by)
Ortega, J. (transcribed and edited by)
Ortega, J. (edited by)
Ortiz, Juan (instrumentation by)
Osborne, Tony (edited by)
Osbourne, Ozzy (author)
Ostendorf, Jens-Peter (edited by)
Osterling, Eric (transcribed by)
Osterling, Eric (instrumentation by)
Osthoff, Helmuth (edited by)
Osthoff, Wolfgang (edited by)
Osvát Erzsébet (words by)
Oswald, Gerald (instrumentation by)
Ötsch, Barbara (edited by)
Ott Rezső (piano score by)
Otterstedt, Annette (edited by)
Oud, Thijs (instrumentation by)
Oud, Thijs (arranged by)
Over, Bertold (edited by)
Owen, Don (instrumentation by)
Owen, Teodora (author)
Ozawa, Kazuko (edited by)
Ozim, Igor (edited by)
Ozsvárt Viktória (edited by)