O   (4) Ojos De Brujo   (4) Omarion Orchestra 'lautarii' Oskorri   (34)
O + Noto Ok 01 Omarion ft. Usher ORCHESTRA BAOBAB Osmonds   (4)
O Brother Where Art Thou? OK Go OMD   (12) Orchestra Harlow Ossastorium
O Melhor De So Pra Contrariar Oka Road Omega   (14) Orchestral Manoeuvres In The Dark   (4) OST Passengers
O Rappa   (7) Okay Temiz Ominus Orcustus Ost/Grand Theft Auto Vice City
O Yuki Conjugate   (5) Okkervil River   (6) Omissa Ordalium Ostrogoth   (4)
O Yuki Conjugate and The Sons Of Silence Okkervil River and Shearwater Omission Ordo Draconis Osunlade   (4)
O'Death Okko Omni   (3) Ordo Equilibrio   (3) Oswaldo Montenegro   (21)
O'Ryan Okna Tsahan Zam Omni Trio   (5) Ordo Equitum Solis   (9) Oszilla
O'stravaganza Oktor Omnibus Ordo Rosarius Equilibrio OT Operacion Techno Vol. 2
O-Zone   (4) Ol' Dirty Bastard   (3) Omnium Gatherum Oregon   (15) Otargos
O.A.R.   (6) Old   (3) On Oregon and Elvin Jones Otarion   (4)
O.A.R. (Of a Revolution) Old 97's On A Solid Rock Oren Ambarchi OTEP   (5)
O.B.I.   (3) Old and In the Gray On the Last Day Orff, Carl   (3) Otis Fodder
O.O.O.D   (3) Old and in the Way On The Might Of Princes Organic Audio Otis Redding   (11)
O.Pogudin   (3) Old Blind Dogs   (4) On Thorns I Lay   (6) Organic Noise Otis Redding and Carla Thomas
O.Rang   (3) Old Crow Medicine Show   (6) On Wings Of Song and Robert Gass Organized Konfusion   (13) Otis Rush   (9)
Oakley Hall Old Dead Tree   (3) Onar Organized Nature Otis Spann   (14)
Oasis   (17) Old Fashion Knife Fight Ondar Orgone Otis Spann and Fleetwood Mac
Oath Of Cirion Old Funeral Ondekoza   (5) Orgy   (5) Otis Taylor   (7)
Oath Witness Old Horned Sheep Ondskapt Orient Expressions Otomo Yoshihide   (7)
Oathean Old Man Gloom   (5) One and Tino Izzo Origa   (8) Otomo Yoshihide and Martin Tetreault
Obiat Old Man's Child   (7) One Dark Martian Origen   (3) Ott
Obie Trice   (3) Old Pagan One Dollar Short Origen - A. Zakharenko Ottawan   (3)
Obituary   (12) Old School Slow Jams One Hand Clapping Origin Ottmar Liebert   (25)
Obo + Jorge Old Wainds One Less Reason Originais Do Samba Ottmar Liebert + Luna Negra
Obsessions Oldfield Terry One Life Crew Orion   (3) Ottmar Liebert and Luna Negra
Obsidian Gate Oldominion One Man Army Orion and Kamal Ottmar Liebert, Paco De Lucia, Al Di Meola
Obsidian Voice Ole Erling   (3) One Man Army And the Undead Quartet Orion Too Feat. Caitlin Otto Von Schirach
Obstinacy Ole Hojer Hansen   (3) One Minute Silence   (4) Orishas Ottorino Respighi
Obszon Geschopf Ole Lukkoye One More Angel Ork Otyg   (4)
Obtest   (5) Oleg Kostrow One Night Only Orkiestra Osmego Dnia   (3) Ougenweide
Ocarina   (11) Oleg Malov, Piano One On One Orkrist   (3) Ouija
Occult   (3) Olemus One Second Bridge Orlando consort Oumou Dioubate
Ocean Colour Scene   (8) Olga Guillot One Self Orlando Contreras Oumou Sangare   (3)
Ocean Machine Olhon One Way Ride Orleya Our Lady Peace   (7)
Ocean of Sorrow Olien Oneiroid Psychosis Ornah-Mental Our Last Night
Oceana Olive Oneiros Ornament Our Turn
Oceania Oliver Dragojevic   (7) Onelinedrawing Ornette Coleman   (28) Ours
Oceanlab Oliver Ganz   (3) OneRepublic   (3) Ornette Coleman Double Quartet Out Hud   (3)
oceanlab featuring justine suissa Oliver Hacke   (3) Onesidezero   (3) Ornette Coleman Trio Out Of Focus
Oceans Of Sadness Oliver Huntemann   (3) Onetwo   (4) Ornette Coleman with Prime Time Out Of Grace
Oceansize   (3) Oliver Jones Oneyed Jack   (3) Oro Solido Out Of Phase
Oceantime Oliver Knussen Onkel Tom Angelripper Orodruin Out Of Reach
Ocelot   (3) Oliver Koletzki   (3) Only Crime Orphanage Out To Win
Ocelot and Vector Selector Oliver Lake Onsetcold Orphaned Land   (6) Outback
Ochre Oliver Lake and Julius Hemphill Onslaught   (3) Orplid   (4) Outblast
Octave One Oliver Messiaen Onyx   (8) Orquesta Arcano Outcast   (3)
Octex Oliver Moldan and Isma-Ae Oomph!   (23) Orquesta Casino de la Playa Outfit
October Falls Oliver Mtukudzi Oophoi   (12) Orquesta De La Luz Outkast   (12)
October File Oliver Nelson; Bill Evans; Roy Haynes; Eric Dolphy; Paul Chambers; Freddy Hubbard Oophoi and Klaus Wiese Orquesta Guayacan Outlawz
October Project Oliver Serano-Alve Oophoi and Klaus Wiese and Tau Ceti Orquesta Tabaco Y Ron Outlines
October Tide   (3) Oliver Shanti   (35) Oophoi and Mathias Grassow and Amir Baghiri Orson Outrage
Octogen Oliver Shanti & Emao Oophoi and Tau Ceti Orson Scott Card Outrageous Cherry
Ocultan Oliver Shanti and Friends   (29) Oophoi, Klaus Wiese, Tau Ceti Orthodox Outta Nowhere
Odal Oliver Shanti and Wang Shan Ti and Hsun Wang Ooze Orthodox chant Outworld
ODB and Black Keith Oliver Wakeman   (3) Opera Ix   (5) Oruc Guvenc and Tumata Ouzo
Odd Nosdam Oliver Wakeman and Clive Nolan Operation Ivy   (9) Os Afro Oval   (7)
Odd Project Oliver Wakeman and Steve Howe Operator Os Cempes Over It
Odes Of Ecstasy Olivia Operator Please Os Paralamas do Sucesso   (19) Over Kill   (18)
Odhinn Olivia Byington   (4) Opeth   (13) Os Serranos Over The Rhine   (11)
Odity and Cooh Olivia Newton-John   (9) Ophelia's Dream   (3) Osamu Kitajima   (5) Overdrive   (3)
Odium Olivia Ruiz   (5) Ophir Oscar Overhuman Project
Odroerir Olivia Tremor Control   (4) Ophthalamia   (6) Oscar Da Grouch OverKill   (21)
Odyssey Olivier Ker Ourio Opium Oscar De leon Overlap Project
Odyssey Bogussevich and Friends Olivier Messiaen   (7) Oppenheimer Oscar Lopez   (4) Overseer
Oedo Sukeroku Taiko Olli Mustonen, piano Oppressed Oscar Mulero Overstreet
Of Hearts and Shadows Olmarin Unioni Oppressor Oscar Peterson   (28) Ovnimoon
Of Montreal   (8) Olof Hammar Opsis Oscar Peterson / Oscar Peterson Trio Ovuca   (3)
Of The Wand and The Moon   (3) Oloolo and Derek Holzer Optical Image   (8) Oscar Peterson and Harry Edison and Eddie Owen Spencer
Off The Sky   (6) Olvis Optimum Wound Profile Oscar Peterson and Stephane Grappelli Oxbow
Offenbach Olympos Mons Optiv Oscar Peterson and Stephane Grappelli Quartet Oxia   (5)
Offer Nissim   (9) Om Optokoppler Oscar Peterson Trio   (5) Oxia - Intus
Offertorium Omar Opus Oscar Peterson Trio and Stan Getz Oxia Vs Ginos and Snake
Officium Triste   (11) Omar a Lopez Rodriguez Opus III Oscar Peterson Trio with Herb Ellis Oxygiene 23
Offroad Omar A. Rodriguez-Lopez Ora Oscar Peterson Trio with Lester Oxymoron
Oforia   (3) Omar and The Howlers Oracle Oscar Peterson with Harry Edison and Eddie Cleanhead Vinson Oystein Sevag   (9)
Ofra Haza   (18) Omar Faruk Tekbilek and Brian Keane Orange 9mm   (4) Oscar Peterson With Joe Pass and Niels-Henning Orsted Pedersen Oystein Sevag + Lakki Patey
Ogre - Skinny Puppy Omar Faruk Tekbilek and Yair Dalal Orange Blossom Oscar Peterson/Joe Pass Oz Noy
Ohgr Omar Faruk Tekbilek, Yair Dalal and Azam Ali Orange Goblin   (6) Oscar Pettiford   (6) Ozark Mountain Daredevils   (4)
Ohm Guru Omar Faruk Tekkbilek and Richard A. Hagopian Orange Juice   (3) Osculum Infame   (5) Ozgur Can and Stian Klo
Ohm Square   (4) Omar Metioui and Eduardo Paniagua Orange Pekoe Osdorp Posse   (6) Ozma
Ohmega Watts Omar Pedrini Orange Range   (18) Osdorp Posse and Nembrionic Ozomatli   (5)
Oi Polloi   (6) Omar Rodriguez   (3) Orange Sector   (7) Osho   (18) Ozric Tentacles   (16)
Oidoxie Omar Rodriguez Lopez   (3) Orbis Mundi OSI   (6) Ozymandias
Oil Omar Rodriguez-Lopez and Damo Suzuki Orbital   (36) Osibisa   (12) Ozymandias and Elijah's Mantle
Oil 10 Omar Salgado Orbital and Michael Kamen Osimira Ozzy Osbourne   (33)
Oingo Boingo   (6) Omar Santana   (4) Orbital and Therapy OSIP O`callaghan and Kearney
Oistrach, Staatskapelle Dres.. Omar Sosa Orbital Decay   (3) Osiris Rodriguez Castillos
Ojoruido Omara Portuondo   (7) Orchester Anthony Ventura   (21)