More than 260 Orchestra worldwide rely on OPAS to work efficiently and reduce error!

Belgium

Brussels Philharmonic Brussels
Orchestre National de Belique Brussels
Orchestre Philharmonique Royal de Liège Liège
Orchestre Royal de Chambre de Wallonie Mons

Denmark

Aalborg Symfonieorkester Aalborg
Aarhus Symfoniorkester Aarhus C
Copenhagen Phil / Tivoli Symphony Orchestra Copenhagen
DR Danish National Choir Copenhagen
DR Danish National Girls Choir Copenhagen
DR Danish National Symphony Orchestra Copenhagen
DR Big Bandet Copenhagen
DR Koorskolen Copenhagen
Ensemble MidtVest Herning
Esbjerg Ensemble Esbjerg
Musikkens Hus Aalborg
Odense Symfoniorkester Odense
Sønderjyllands Symfoniorkester Sønderborg

Germany

Bamberg Symphony Orchestra Bamberg
Beethoven Orchestra Bonn
Berlin Philharmonic Orchestra Berlin
Bavarian Radio Choir Munich
German Radio Philharmonic Orchestra Saarbrücken Kaiserslautern Saarbrücken
German State Philharmonic Orchestra Rhineland-Palatinate Ludwigshafen on the Rhine
German Symphony Orchestra Berlin Berlin
Dresden Philharmonic Orchestra Dresden
Duisburg Philharmonic Orchestra Duisburg
Elbland Philharmonic Orchestra Saxony Riesa
Göttingen Symphony Orchestra Göttingen
Hessian Radio Big Band Frankfurt on the Main
Hessian Radio Symphony Orchestra Frankfurt on the Main
Jena Philharmonic Orchestra Jena
Potsdam Chamber Academy Potsdam
Ludwigsburg Palace Festival Ludwigsburg
Munich Philharmonic Orchestra Munich
NDR Radiophilharmonie Hamburg
NDR Symphony Orchestra Hamburg
New Philharmonic Orchestra of Westphalia Recklinghausen
Lower Rhine Symphony Orchestra Mönchengladbach
Nuremberg Symphony Orchestra Nuremberg
Frankfurt Opera Frankfurt on the Main
Leipzig Opera Leipzig
Orchestra Jakobsplatz Munich Munich
Philharmonic Orchestra of South Westphalia Hilchenbach
Hamburg Philharmonic Orchestra Hamburg
Philharmonic State Orchestra Mainz Mainz
RIAS Chamber Choir Berlin
Rundfunkchor Berlin Berlin
Radio Symphony Orchestra Frankfurt on the Main
Radio Symphony Orchestra Berlin Berlin
Saxon State Opera Dresden Dresden
Wuppertal Symphony Orchestra Wuppertal
Sorbian National Ensemble Bautzen
State Orchestra Rheinische Philharmonie Koblenz
Stuttgart Chamber Orchestra Stuttgart
Stuttgart Philharmonic Orchestra Stuttgart
Southwest German Philharmonic Orchestra Constance Constance
SWR Symphony Orchestra Stuttgart
Theatre Lübeck Lübeck
Halle Theatre, Opera and Orchestra Hall
Theatre and Philharmonic Hall Essen GmbH Food
WDR Symphony Orchestra Cologne Cologne
Würth Philharmonic Orchestra Künzelsau
Württemberg Philharmonic Orchestra Reutlingen Reutlingen
Württemberg Chamber Orchestra Heilbronn Heilbronn

Finland

Finnish National Opera Helsinki
Finnish Radio Symphony Orchestra Helsinki
Helsinki Philharmonic Orchestra Helsinki
Jyväskylä Sinfonia Jyväskylä
Kuopion Kaupunginorkesteri Kuopio
Lahti Symphony Orchestra Lahti
Tampere Filharmonia Tampere
Tapiola Sinfonietta Espoo
Turun Filharmoninen Orkesteri Turku

France
Chœur de Radio France Paris
Maîtrise de Radio France Paris
Orchestre de Chambre de Paris Paris
Orchestre d'Auvergne
Clermont-Ferrand
Orchestre de Paris Paris
Orchestre National de France Paris
Orchestre National de Lille Lille
Orchestre Philharmonique de Monte-Carlo Monte Carlo
Orchestre Philharmonique de Radio France Paris
Orchestre Philharmonique de Strasbourg Strasbourg

Netherlands
Koninklijk Concertgebouworkest Amsterdam
Radio Filharmonic Orchestra Hilversum
Groot Omroepkoor Hilversum
Phion Arnhem/Enschede
Rotterdams Philharmonisch Orkest Rotterdam
Het BalletorkestAmsterdam
Netherlands Philharmonic OrchestraAmsterdam
Nederlands KamerorkestAmsterdam
Philharmonie Zuidnederland Eindhoven/Maastricht
Noord Nederlands Orkest Groningen
Ministerie van Defensie: The Hague

Metropolis Orkest Hilversum
Koninklijke Militaire Kapel 'Johan Willem Friso'
Kapel van de Koninklijke Luchtmacht
Koninklijke Marine Naval Chapel
Tamboers en Pijpers van het Korps Mariniers
Regimental Fanfare 'Garde Grenadiers en Jagers
Trumpet Corps of the Koninklijke Marechaussee
Fanfare van het Korps Nationale Reserve
Fanfare 'Bereden Wapens
Het Residentieorkest The Hague
André Rieu Productions Maastricht

Norway
Bergen Philharmonic Orchestra Bergen
Oslo Filharmonics Oslo
Stavanger Symfoniorkester Stavanger
Trondheim Solistene Trondheim

Austria

Stage Baden Baden
Camerata SalzburgSalzburg
Grafenegg Kulturbetriebsgesellschaft m.b.H. Grafenegg
Orchestra Vienna Academy Vienna
Tyrolean Symphony Orchestra Innsbruck
Tonkünstler Orchestra of Lower Austria St Pölten

Portugal

Fundação Calouste Gulbenkian Lisbon

Sweden

Gothenburg Symphony Orchestra Gothenburg
Helsingborgs Symfoniorkester Helsingborg
Lansmusiken Örebro AB Örebro
Norrköpings Symfoniorkester Norrköping
Swedish Radio Symphony Orchestra Stockholm

Switzerland

La Cetra Baroque Orchestra Basel Basel
Musikkollegium Winterthur Winterthur
Orchestra della Svizzera Italiana Lugano
Orchestre de Chambre de Genève Geneva
Orchestre de Chambre de Lausanne Lausanne
Orchestre de la Suisse Romande Geneva
Zurich Opera House Zurich
Basel Symphony Orchestra Basel
Tonhalle Orchestra Zurich
Zurich Chamber Orchestra Zurich

Spain

Bilbao Orkestra Sinfonikoa Bilbao
Euskadiko Orkestra - Basque National Orchestra Basque Country
Orquesta de Filarmónica de Gran Canaria Las Palmas
Orquesta Sinfónica de Navarra Pamplona
Orquesta Sinfónica del Principado de Asturias Oviedo
Orquestra Simfónica de Barcelona i Nacional de Catalunya Barcelona
Real Filharmonía de Galicia Santiago de Compostela
Orquesta y Coro Nacional de Espana Madrid

Calgary Philharmonic Orchestra Calgary, AB
Edmonton Symphony Orchestra Edmonton, AB
Kitchener-Waterloo Symphony Kitchener-Waterloo, ON
National Arts Centre Orchestra Ottawa, ON
Orchestre Symphonyie de Québec Québec City, QC
Regina Symphony Regina, SK
Tafelmusik Baroque Orchestra Toronto, ON
Toronto Symphony Toronto, ON
Symphony Nova Scotia Halfifax, NS
Windsor Symphony Windsor, ON
Winnipeg Symphony Orchestra Winnipeg, MB

Alabama Symphony Orchestra Mobile, AL
Allentown Symphony Orchestra Allentown, PA
Arkansas Symphony Orchestra Little Rock, AR
Atlanta Symphony Orchestra Atlanta, GA
Boston Philharmonic Boston, MA
Boston Symphony Orchestra / Tanglewood Music Center Boston, MA
Buffalo Philharmonic Buffalo, NY
Canton Symphony Orchestra Canton, OH
Caramoor Music Festival Katonah, NY
Carnegie Hall Archives and Museum New York, NY
Chattanooga Symphony and Opera Chattanooga, TN
Cincinnati Symphony Orchestra Cincinnati, OH
Columbus Symphony Orchestra Columbus, OH
Curtis Institute of Music Philadelphia, PA
Dallas Symphony Orchestra Dallas, TX
Delaware Symphony Orchestra Wilmington, DE
Detroit Symphony Orchestra Detroit, MI
Elgin Symphony Orchestra Elgin, IN
Fort Wayne Philharmonic Ft. Wayne, IN
Grand Rapids Symphony Grand Rapids, MI
Grand Teton Music Festival Jackson Hole, WY
Grant Park Music Festival Chicago, IL
Handel+Haydn Society Boston, MA
Hartford Symphony Orchestra Hartford, CT
Houston Symphony Houston, TX
Indianapolis Symphony Orchestra Indianapolis, IN
Jacksonville Symphony Jacksonville, FL
Kansas City Symphony Kansas City, MO
Los Angeles Opera Orchestra Los Angeles, CA
Los Angeles Philharmonic Los Angeles, CA
Louisiana Philharmonic Orchestra New Orleans, LA
Manhattan School of Music New York, NY
Memphis Symphony Orchestra Memphis, TN
National Repertory Orchestra Breckenridge, CO
National Symphony Orchestra Washington, DC
New Jersey Symphony Orchestra Newark, NJ
New York City Ballet New York, NY
North Carolina Symphony Orchestra Raleigh, NC
Omaha Symphony Orchestra Omaha, NE
Oregon Bach Festival Eugene, OR
Oregon Symphony Portland, OR
Orlando Philharmonic Orlando, FL
Pacific Symphony Irvine, CA
Phoenix Symphony Phoenix, AZ
Pittsburgh Symphony Orchestra Pittsburgh, PA
Portland Symphony Portland, ME
Preston Hollow Presbyterian Church Dallas, TX
Rhode Island Philharmonic Providence, RI
Richmond Symphony Orchestra Richmond, VA
Rochester Philharmonic Orchestra Rochester, NY
Saint Paul Chamber Orchestra St. Paul, MN
Sarasota Orchestra Sarasota, FL
SMU Meadows School of the Arts Dallas, TX
Spokane Symphony Orchestra Spokane, WA
Sun Valley Music Festival Ketchum, ID
The Colburn School Los Angeles, CA
Tucson Symphony Orchestra Tucson, AZ
Utah Symphony Orchestra Salt Lake City, UT
Virginia Symphony Orchestra Norfolk, VA
West Virginia Symphony Wheeling, WV

Academy of Ancient Music Cambridge
BBC Concert Orchestra London
BBC National Orchestra of Wales Cardiff
BBC Philharmonic Manchester
BBC Scottish Symphony Orchestra Glasgow
BBC Singers London
BBC Symphony Orchestra & Chorus London
Birmingham Contemporary Music Group Birmingham
Bournemouth Symphony Orchestra Poole
Britten Sinfonia Cambridge
City of Birmingham Symphony Orchestra Birmingham
English National Opera Orchestra London
London Philharmonic Orchestra London
Northern Sinfonia Newcastle
Royal Academy of Music London
Royal Liverpool Philharmonic Orchestra Liverpool
Royal Opera House London
Royal Philharmonic Orchestra London
Scottish Chamber Orchestra Edinburgh

Budapest Festival Orchestra Budapest
China National Center for the Performing Arts Orchestra Beijing
Estonian National Symphony Orchestra Tallinn
Iceland Symphony Orchestra Reykjavík
Israel Philharmonic Orchestra Tel Aviv
Malaysian Philharmonic Orchestra Kuala Lumpur
MusicAeterna Saint Petersburg
Orquesta Filarmónica de la UNAM Mexico City
Orquestra Sinfónica do Estado de São Paulo São Paulo
Puerto Rico Symphony San Juan
Qatar Philharmonic Orchestra Doha
Radio Telefis Eireann Dublin
RTV Slovenia Symphony Orchestra Ljubljana
Singapore Symphony Orchestra Singapore

Theatro Municipal São Paulo