Artists – O
Artists: O'Connell - Opie
- O'Connell, Clare (cello)
- O'Connor, Kelley (mezzo-soprano)
- O'Conor, John (piano)
- O'Day, Anita (vocals)
- O'Dette, Paul (lute)
- O'Donnell, John (organ)
- O'Gorman, Christopher (tenor)
- O'Hara, Kelli (mezzo-soprano)
- O'Higgins, Dave (saxophone)
- O'Neill, Simon (tenor)
- O'Neill, Paul (tenor)
- O'Reilly, Graham (conductor)
- O'Rourke, Miceál (piano)
- O’Donnell, James (conductor)
- O’Hara, Ronan (piano)
- O’Neill, Dennis (tenor)
- O/Modernt Chamber Orchestra (orchestra)
- Oberlin, Russell (countertenor)
- Oberlinger, Dorothee (recorder)
- Oborin, Lev (piano)
- Obraztsova, Elena (mezzo-soprano)
- Ochman, Wieslaw (tenor)
- Ockert, Julius (clarinet)
- Octandre Ensemble (miscellaneous ensemble)
- Odense Symphony Orchestra (orchestra)
- Odhecaton (early music ensemble)
- Oehlberger, Karl (bassoon)
- Oelze, Christiane (soprano)
- Ogawa, Noriko (piano)
- Ogawa, Asako (harpsichord)
- Ogden, Craig (guitar)
- Ogdon, John (piano)
- Ogerman, Claus (conductor)
- Ogg, Jacques (early keyboard instruments)
- Ogg, Harry (conductor)
- Ogrintchouk, Alexei (oboe)
- Oh, Linda May Han (double bass)
- Ohlsson, Garrick (piano)
- Oi, Eriko (flute)
- Oistrakh, David (violin)
- Oistrakh, Igor (violin)
- Okamoto, Yuya (cello)
- Oke, Alan (tenor)
- Olatuja, Michael (bass guitar)
- Olbertz, Walter (piano)
- Olczak, Krzysztof (accordion)
- Oldenburg State Orchestra (orchestra)
- Olefirowicz, Josef R. (conductor)
- Olefirowicz, Joseph R. (conductor)
- Olejniczak, Janusz (piano)
- Olevsky, Julian (violin)
- Oliver Schnyder Trio (piano trio)
- Olivero, Magda (soprano)
- Ollé, Àlex (stage director)
- Ollikainen, Eva (conductor)
- Ollila, Tuomas (conductor)
- Ollu, Franck (conductor)
- Olmedo, Alex (cello)
- Olóriz, Alejandro (cello)
- Olszyńska, Sylwia (soprano)
- Ometto, Mattia (piano)
- Omordia, Rebeca (piano)
- Oncina, Juan (tenor)
- Ono, Chihiro (violin)
- Ono, Kazushi (conductor)
- Onofri, Enrico (conductor)
- Onyx Brass (brass ensemble)
- Oortmerssen, Jacques van (organ)
- Oosten, Ben van (organ)
- Open Chamber Orchestra (orchestra)
- Oper Frankfurt (opera company)
- Oper Graz (opera company)
- Opéra National de Lyon (opera company)
- Opéra national de Paris (opera company)
- Opera North (opera company)
- Opéra Orchestre Normandie Rouen (orchestra)
- Opera Rara Chorus (choir)
- Opernhaus Zürich (opera company)
- Ophele, Emmanuelle (flute)
- Opie, Alan (baritone)
Artists: Opium String Quartet - Orchestre Royal de Chambre de Wallonie
- Opium String Quartet (string quartet)
- Opolais, Kristine (soprano)
- Oppitz, Gerhard (piano)
- Opstad, Mark (conductor)
- Opstad, James (bass)
- Opus13 (string quartet)
- ORA (choir)
- ORA Singers (choir)
- Oramo, Taavi (conductor)
- Oramo, Sakari (conductor)
- Orbelian, Constantine (conductor)
- Orchestra Barocca di Cremona (early music ensemble)
- Orchestra da Camera 'Ferrucio Busoni' (orchestra)
- Orchestra da Camera Domenico Mazzocchi del Civita Festival (orchestra)
- Orchestra del Teatro Comunale di Bologna (orchestra)
- Orchestra Del Teatro La Fenice Di Venezia (orchestra)
- Orchestra del Teatro Lirico di Cagliari (orchestra)
- Orchestra del Teatro Massimo Bellini di Catania (opera company)
- Orchestra del Teatro Regio di Torino (orchestra)
- Orchestra dell'Accademia Nazionale di Santa Cecilia (orchestra)
- Orchestra dell'Opera Carlo Felice Genova (orchestra)
- Orchestra della Svizzera Italiana (orchestra)
- Orchestra di Padova e del Veneto (orchestra)
- Orchestra Donizetti Opera (orchestra)
- Orchestra Filarmonica Della Calabria (orchestra)
- Orchestra La Scintilla (orchestra)
- Orchestra Mozart (orchestra)
- Orchestra Nova (orchestra)
- Orchestra of La Monnaie (opera company)
- Orchestra of Opera North (orchestra)
- Orchestra of St. John's Smith Square (orchestra)
- Orchestra Of St. Luke's (orchestra)
- Orchestra of the 18th Century (orchestra)
- Orchestra of the Age of Enlightenment (orchestra)
- Orchestra of the Americas (orchestra)
- Orchestra of the Arena di Verona (orchestra)
- Orchestra of the Swan (orchestra)
- Orchestra Sinfonica Abruzzese (orchestra)
- Orchestra Sinfonica di Milano della RAI (orchestra)
- Orchestra Sinfonica di Milano Giuseppe Verdi (orchestra)
- Orchestra Sinfonica di Roma (orchestra)
- Orchestra Sinfonica di Roma della RAI (orchestra)
- Orchestra Sinfonica di Torino della RAI (orchestra)
- Orchestra Sinfonica Nazionale della RAI (orchestra)
- Orchestra the Prezent (orchestra)
- Orchestre classique de Montréal (orchestra)
- Orchestre Consuelo (orchestra)
- Orchestre de Bretagne (orchestra)
- Orchestre de Chambre de Jean-François Paillard (orchestra)
- Orchestre de Chambre de Lausanne (orchestra)
- Orchestre de Chambre de Paris (orchestra)
- Orchestre de Chambre de Toulouse (orchestra)
- Orchestre de Chambre Jean-Francois Paillard (orchestra)
- Orchestre de Chambre Nouvelle-Aquitaine (orchestra)
- Orchestre De Concerts Straram (orchestra)
- Orchestre de l'Opéra Royal (orchestra)
- Orchestre de la Suisse Romande (orchestra)
- Orchestre de Paris (orchestra)
- Orchestre des Champs Elysées (orchestra)
- Orchestre des Champs-Élysées (orchestra)
- Orchestre des Concerts Lamoureux (orchestra)
- Orchestre du Capitole de Toulouse (orchestra)
- Orchestre FILMharmonique (orchestra)
- Orchestre Francais des Jeunes (orchestra)
- Orchestre Métropolitain (orchestra)
- Orchestre National Bordeaux Aquitaine (orchestra)
- Orchestre National de Bordeaux Aquitaine (orchestra)
- Orchestre national de Cannes (orchestra)
- Orchestre National de France (orchestra)
- Orchestre National de la Radiodiffusion Française (orchestra)
- Orchestre National de Lille (orchestra)
- Orchestre National de Lyon (orchestra)
- Orchestre national de Metz Grand Est (orchestra)
- Orchestre National des Pays de la Loire (orchestra)
- Orchestre Philharmonique de Liège (orchestra)
- Orchestre Philharmonique de Monte-Carlo (orchestra)
- Orchestre Philharmonique de Radio France (orchestra)
- Orchestre Philharmonique De Vienne (orchestra)
- Orchestre Révolutionnaire et Romantique (orchestra)
- Orchestre Royal de Chambre de Wallonie (orchestra)
Artists: Orchestre Symphonique de Quebec - Ozone
- Orchestre Symphonique de Quebec (orchestra)
- Orchestre Victor Hugo (orchestra)
- Ordinary Affects (chamber ensemble)
- Oren, Daniel (conductor)
- Orendt, Gyula (baritone)
- Orf Vienna Radio Symphony Orchestra (orchestra)
- Orfeo 55 (early music ensemble)
- Orfeo Orchestra (early music ensemble)
- Orfeon Donostiarra (choir)
- Orford, James (organ)
- Orford String Quartet (string quartet)
- Orgonasova, Luba (soprano)
- Orkester Nord (orchestra)
- Orkis, Lambert (piano)
- Orlando Consort (early music ensemble)
- Orliński, Jakub Józef (countertenor)
- Orlov, Alexander (conductor)
- Ormandy, Eugene (conductor)
- Oropesa, Lisette (soprano)
- Orozco, Rafael (piano)
- Orozco-Estrada, Andrés (conductor)
- Orphei Drängar (choir)
- Orphelion Ensemble (chamber ensemble)
- Orpheus Chamber Orchestra (orchestra)
- Orquesta Ciudad de Granada (orchestra)
- Orquesta de la Comunidad de Madrid (orchestra)
- Orquesta de Valencia (orchestra)
- Orquesta Filarmonica de Gran Canaria (orchestra)
- Orquesta Filarmónica de la Ciudad de México (orchestra)
- Orquesta Sinfónica de Castilla y León (orchestra)
- Orquesta Sinfónica de Madrid (orchestra)
- Orquestra de la Comunitat Valenciana (orchestra)
- Orquestra Simfònica de Barcelona I Nacional de Catalunya (orchestra)
- Orsi, Andrea (guitar)
- Ortega, Ginesa (mezzo-soprano)
- Ortiz, Cristina (piano)
- Osborn, John (tenor)
- Osborne, Steven (piano)
- Osby, Greg (saxophone)
- Osipova, Natalia (dancer)
- Oslo Philharmonic Orchestra (orchestra)
- Oslo Sinfonietta (chamber ensemble)
- Osokins, Georgijs (piano)
- Osowski, Clara (mezzo-soprano)
- Ossonce, Jean-Yves (conductor)
- Oštrek, David (baritone)
- Ostrobothnian Chamber Orchestra (orchestra)
- Otaka, Tadaaki (conductor)
- Ott, Alice Sara (piano)
- Ottensamer, Andreas (clarinet)
- Ottensamer, Daniel (clarinet)
- Otter, Anne Sofie von (mezzo-soprano)
- Otterloo, Willem van (conductor)
- Otto, Lisa (soprano)
- Ouatu, Florin Cezar (countertenor)
- Oudenweijer, Lars Wouters (clarinet)
- Oulu Sinfonia (orchestra)
- Oulu Symphony Orchestra (orchestra)
- Oundjian, Peter (conductor)
- Ousset, Cécile (piano)
- Ovcharenko, Illia (piano)
- Ovcharenko, Artem (dancer)
- Ovenden, Jeremy (tenor)
- Owen, Martin (horn)
- Owen, Charles (piano)
- Owens, Eric (baritone)
- Owens, Anne-Marie (mezzo-soprano)
- Owens, Matthew (conductor)
- Owens, Matthew (organ)
- Owens, Jimmy (trumpet)
- Oxalys (chamber ensemble)
- Oxford Bach Choir (choir)
- Oxford Bach Soloists (choir)
- Oxford Camerata (choir)
- Oxford Girls' Choir (choir)
- Oxford Philharmonic Orchestra (orchestra)
- Oyarzabal, Antonio (piano)
- Ozawa, Seiji (conductor)
- Ozel, Evren (piano)
- Ozone, Makoto (piano)
