Ornella Vanoni (P. Fresu, N. Le, R. Cipelli, T. Tracanna, A. Zanchi, E. Fioravanti, N. Mangalavite)
Ornette Coleman (D. Cherry, W. Norris, D. Payne, B. Higgins)
Orrin Evans (S. Newsome, R. Bowen, E. Revis, G. Jackson)
Ortalion (C. Morawski, P. Małka, J. Brzeziewicz, J. Stromski, M. Otłowski, R. Jakubiec, R. Chomik)
Ortalion (C. Morawski, R. Jakubiec, M. Otlowski, J. Brzeziewicz, P. Majka, J. Stromski)
Oscar Noriega'S Play Party (C. Vu, B. Shepik, T. Rainey)
Oskar Aichinger / Franz Koglmann
Oskar Rozsa / John Shannon / Martin Valihora
Oskar Rozsa Sextet (A. Seban, M. Skuta, M. Buntaj, R. Tariska, L. Priehradnik)
Other Dimensions In Music (R. Campbell Jr., D. Carter, W. Parker, R. Bakr)
Other Dimensions In Music Special Quintet with Matthew Shipp (D. Carter, R. Campbell Jr., M. Shipp, W. Parker, R. Bakr)
Otto Hejnic Organism
Otto Hejnic Organism (B. Charette, O. Roberts)
Otto Hejnic Trio
Otto Hejnic Trio (O. Krajnak, J. Feco)
Pablo Held (W. Mutzke, S. Gille, N. Klein, K. Pechlof, H. Nuss, H. Sieverts, D. Fuhr, R. Landfermann, J. Burgwinkel)
Pablo Ziegler / Quique Sinesi (New Tango Duo) With Walter Castro
Pachora (C. Speed, B. Shepik, S. Sverrisson, J. Black)
Pachora (J. Black, C. Speed, B. Shepik, S. Sverrisson)
Paco De Lucia
Paier Valcic Quartet (K. Paier, A. Valcic, S. Gfrerrer, R. Werni)
Palinckx Border (Joost Buis, Jacques Palinckx, Cor Fuhler, Bert Palinckx, Jim Meneses)