OBS I (21.Juni 1997)

Sweetwater, The Hitchin? Post, The Gypsy Riders, Hazeldine, Go To Blazes

OBS II (12./13.Juni 1998)

Markus Rill & The Gunslingers, Matthew Ryan, Hugo Race & The True Spirit, Fink, The Good Sons, Hazeldine, Neal Casal & Band

OBS III (11./12.Juni 1999)

The Hitchin? Post, 25 Green Way, The Original Reverend Jones, The Great Crusades, Dakota Suite, Tilman Rossmy Quartett, Terry Lee Hale & The Blind Doctors, Chris & Carla, Todd Thibaud, The Walkabouts

OBS IV (09./10./11.Juni 2000)

The Twang, Green Apple Sea, Buddy & The Huddle, Das Weeth Experience, Fink, Western Electric, Chris Burroughs Band, Willard Grant Conspiracy, 16 Horsepower, Franz Dobler, Ramsay Midwood & Randy Weeks, HGH, Madrugada, Midnight Choir, Slobberbone, Neal Casal & Band

OBS V (01./02./03.Juni 2001)

Jim Wayne Swingtett, C*Clay, Tom Heyman, Reto Burrell, 25 Green Way, Big In Iowa, Savoy Grand, Friends Of Dean Martinez, Steve Wynn & The Miracle 3, Neal Casal, Wake Me When I?m Under, The Great Crusades, Go To Blazes, Hazeldine, Lazy Horse

OBS VI (17./18./19.Mai 2002)

One Finger Salute, Smokestack Lightnin?, Kristofer Aström, Locas In Love, One Bar Town, Gemma Hayes, St. Thomas, Isolation Years, Veranda Music, Yayhoos, Pleasant Grove, Johnny Dowd, Jon Dee Graham, Cary Hudson, Friends Of Dean Martinez, Ai Phoenix, Rowdy Roddy Reini vs. Hulk Heckman, Prince Koolski?s Royal Sound feat. Kamerad Schall

OBS VII (06./07./08.Juni 2003)

Granfaloon Bus, Chris Eckman, The Bambi Molesters, King Khan & his Shrines, Smokestack Lightnin', The White Birch, Kim Carson, Swamp Hogs, Maria Solheim, Greyhound Soul, Vic Chesnutt, Shilf, One Finger Salute, Virgil Shaw, DJ Flo - Boozoo Bajou, The Koolski Corporation, Midnight Choir, Chuck Prophet, Terry Lee Hale

OBS VIII (28./29./30.Mai 2004)

Mark Olson & The Creekdippers feat. Victoria Williams, Hugo Race & True Spirit, Big Bang, The Resentments, Jackie Leven, Timesbold, Pat MacDonald, Michael Weston King & The Decent Man, Savoy Grand, Lampshade, Jan Pecher & Band, Markus Rill & The Gunslingers, DJ Captain Trip, Coydog, Mountaineer, Transmissionary Six

OBS IX (13./14./15. Mai 2005)

Thomas Dybdahl & that great october sound, Joseph Parsons & Band, South San Gabriel, Centro-Matic, Richmond Fontaine, Maggie, Pierce & E.J., Hank Ray, Willard Grant Conspiracy, Helldorado, Ben Weaver Trio, Miss Kenichi, Rich Hopkins & Luminarios, Las Mananitas, Dead Brothers, The Broken Family Band, The Mighty Mardi Gras Three, Tütes Slideshow, Kalle & Ich, Junko Partners

OBS X (25./26./27./28. Mai 2006)

Die Mukketier Bande, One Bar Town, Rusties, Boozed, Nils Koppruch, Joycehotel, Goldrush, Broken Social Scene, The Great Crusades, Sarah Hepburn & Band, Gerrit Stuntebeck, Robert Fisher, Downpilot, K1, Mofro, Big Bang, Mardi Gras BB, The Walkabouts, Washington, Stefan Maelk, Amy Millan & Band, Jason Collet & Band, Jeb Loy Nichols, Seachange Okkervil River, Steve Wynn & the Miracle Three, Tütes Slideshow, Kalle & Ich, DJ Koolski & Whirly Joe

OBS XI (25./26./27. Mai 2007)

Wolam, Skurilli, The Unisex, Rachelle Van Zanten, Irving, Dziuk's Küche, Al DeLoner, Sport, Get Well Soon, Boy Omega, Michael J. Sheehy, Lampshade, Missouri, Dirt Music, Olli Schulz & der Hund Marie, Andrew Bird, Ben Weaver, Cracker, Woven Hand

OBS XII (09./10./11. Mai 2008)

SIR SIMON, THE AUDIENCE, THE VIOLENT YEARS, GIRLS IN HAWAII, CLARA LUZIA, SHOOTING JOHN, CUBA MISSOURI, RYKARDA PARASOL & THE TOWER RAVENS, HYACINTH HOUSE, MICHAEL J. SHEEHY & THE HIRED MOURNERS, SCOTT MATTHEW, MARY EPWORTH & THE JUBILEE BAND, GISBERT ZU KNYPHAUSEN, SCOUT NIBLETT, HANK SHIZZOE & THE DIRECTORS, DEXTER JONES CIRCUS ORCHESTRA, THE GREAT CRUSADES, TIMESBOLD