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Musical World
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- a Camillo Togni - International Composition Competition
- A Sei Voci
- A-Cappella-Chor Villach
- A-R Editions Inc.
- A. I. Yampolsky International Violin Competition
- A. L. Brourman Associates Inc.
- A. Maldybaev Academic Opera & Ballet Theatre
- A. Pedrollo - Vicenza Music Conservatory
- A. Schnittke Moscow State Music Institute
- A. Scriabin - Premio Internazionale Pianistico
- A. Yurlov State Academic Choir Capella of Russia
- A.N. Scriabin International Piano Competition
- A.V. Sveshnikov State Academic Russian Choir
- Aalborg Opera Festival
- Aalborg Symfoniorkester
- Aalener Jazzfest
- Aalto Theater
- Aargauer Symphonie Orchester
- Aarhus Festival
- Aarhus International Jazz Festival
- Aarhus Summer Opera
- Aarhus Symfoniorkester
- Abai State Academic Opera & Ballet Theatre
- Abbey Bach Festival
- Abbey Church Events
- Abbotsford Symphony
- Abby Whiteside Foundation Inc.
- Abendmusik: Lincoln
- Aberdeen International Youth Festival
- Abhinaya Dance Company of San Jose
- Abilene Christian University
- Abilene Philharmonic Association Inc.
- Abraham Baldwin Arts Connection
- Abrons Arts Center
- Abu Dhabi Music & Arts Festival
- Abu Gosh Vocal Music Festival
- ACA Digital Recording Inc.
- Académie de Jeunes Solistes
- Académie de Musique de Tibor Varga
- Académie de Musique Tibor Varga Sion
- Académie Pianistique Internationale
- Academia Allegro Vivo
- Academia de Muzica Gheorghe Dima
- Academic Choir Doina
- Academic Folk Choir of The Plovdiv Academy of Music & Dance Art
- Academic Music Comedy Theatre
- Academic N. Tlendiev Folklore-Ethnographic Orchestra Otyrar Sazy
- Academic Opera & Ballet Theatre
- Academic Russian Folk Instruments Orchestra at All-Russian TV & Radio Company
- Academic State Choir of Armenia
- Academic Symphony Orchestra at Caucasian Spa
- Academic Symphony Orchestra of Kharkiv Philharmonic
- Academic Symphony Orchestra of Yaroslavl State Philharmonia
- Academic Symphony Orchestra Saratov
- Academic Symphony Orchestra Volgograd
- Académie Musicale de Villecroze
- Academy Concerts
- Academy of Ancient Music
- Academy of Arts in Banská Bystrica
- Academy of Country Music
- Academy of Music
- Academy of Music & Dance at Göteborg Univ.
- Academy of Music Theatre & Fine Arts
- Academy of Music, Dance & Fine Arts
- Academy of Soloists Chamber Orchestra
- Academy of St Martin in the Fields Chorus
- Academy of St. Martin in the Fields
- Acadia Performing Arts Series
- Acadia University, School of Music
- Acadiana Symphony Orchestra & Conservatory of Music
- Acbt International Performing Arts Camp
- Accademia Musicale Chigiana
- Accademia Musicale Chigiana - Music Master Classes
- Accademia Musicale Pescarese Scuola Superiore di Musica
- Accentus Chamber Choir
- Accentus Music UG
- ACES (Academic & Cultural Events Series) Buena Vista University
- ACFEA Tour Consultants
- ACIS/Encore Tours
- ACMP - The Chamber Music Network
- ACMP Foundation
- Acoustic Dimensions
- Acoustic Guitar
- Acoustical Design Collaborative Ltd.
- Acoustical Society of America
- Act 1 Tours
- ACT Ottawa
- Acta Acustica united with Acustica
- Acta Mozartiana
- Acte Préalable Sp.
- Activist Music
- Adam Abeshouse
- Adam Chamber Music Festival
- Adam International Cello Festival
- Adamant Music School
- Adamant Music School (Summer school / Menahem Pressler Master Classes)
- Adams State College
- Adelaide Art Orchestra (AdAO)
- Adelaide Cabaret Festival
- Adelaide Festival of Arts
- Adelaide Fringe Inc.
- Adelaide International Guitar Festival
- Adelaide Symphony Orchestra
- Adelphi Chamber Orchestra
- Adelphi University
- Adilia Alieva International Piano Competition
- Adler Theatre
- Admiral Theatre
- Admiral Theatre (Perf. Arts)
- Adolf Robitschek GmbH.
- Adrian Symphony
- Adrienne Arsht Center for the Performing Arts of Miami-Dade County
- Adrienne Arsht Center of Miami-Dade County
- Advent Chamber Orchestra
- Adventures in Summer Music
- Adventures with the Arts
- AEA Consulting
- Aeolian Ballet Theatre
- Aercoustics Engineering Ltd.
- African American Dance Ensemble
- African American Innovators LLC
- After Dinner Opera Company
- Agassiz Summer Chamber Music Festival
- Agenda VivaMúsica!
- AGMAzine
- Agnes Scott College
- Agnieszka Laska Dancers
- AGO Award in Organ Composition
- AGO/ECS Publishing Award in Choral Composition
- AGO/Quimby Regional Competitions for Young Organists
- Agustin Barrios International Guitar Competition
- AIMS Festival Orchestra in Graz
- AIMS in Graz Austria (The Summer Vocal Institute including The AIMS Festival Orchestra in Graz)
- AIMS in Graz, Austria (The Summer Vocal Institute, The AIMS Festival Orchestra, Graz)
- Air Jamaica Jazz & Blues Festival
- Aircraft Chartering Services Ltd.
- Airways Freight Corp.
- Ak Zhauyn State Chamber Orchestra
- Akademia e Arteve
- Akademia Muzyczna (Gdansk) (Academy of Music in Gdansk)
- Akademia Muzyczna im. Karola Szymanowskiego w Katowicach
- Akademia Muzyczna Kraków
- Akademii Muzycznej im. Fryderyka Chopina (Warsaw)
- Akademija za Glasbo Ljubljana
- Akbank Jazz Festival
- Akram Khan Company
- Akron Beacon Journal
- Akron Symphony Orchestra
- Akustiks LLC
- Al Bustan International Festival of Music & the Arts
- Al. Ringling Theatre
- Al. Ringling Theatre Lively Arts Series
- Ala-Too Symphony Orchestra of Public Musical Foundation
- Alabama Ballet
- Alabama State University School of Music
- Alabama Symphony Orchestra
- Alan Hovhaness Chamber Orchestra
- Alaska Center for the Performing Arts
- Alaska Center for the Performing Arts (Facilities)
- Alaska Dance Theatre Inc.
- Alaska Fine Arts Academy
- Alaska Junior Theater
- Alba Records
- alban elved dance company
- Albany Berkshire Ballet
- Albany Concert Association Inc.
- Albany Herald
- Albany Records (UK)
- Albany State University
- Albany Symphony Orchestra
- Albany Symphony Orchestra Inc.
- Albert McNeil Jubilee Singers of Los Angeles
- Alberta Bair Theater
- Alberta Bair Theater (Facilities)
- Alberta Ballet
- Alberta College Conservatory of Music Grant MacEwan College (Perf. Arts)
- Alberta College Conservatory of Music, Grant MacEwan College
- Alberta Opera Musical Theatre for Young People
- Alberta Opera Musical Theatre for Young People
- Alberto Curci Concours International de Violon
- Albertsgifts.com
- Albion College
- Albright College Concert Series
- Albuquerque Journal
- Albuquerque-Santa Fe - KHFM-FM 95.5 MHz
- Aldeburgh Festival of Music & the Arts
- Alden Lee Company
- Alden Theatre
- Alden Theatre Series
- Alea III International Composition Competition
- Aleba Gartner Associates
- Aleksander Tansman International Competition of Musical Personalities
- Alessandro Casagrande, Concorso Pianistico Internazionale
- Alex Theatre
- Alex Theatre (Perf. Arts)
- Alexander Girardi Internationaler Gesangswettbewerb
- Alexander-Pillin Music Studio
- Alexandria Symphony Orchestra
- Alfred Music Publishing
- Alfred University
- Alfredo Casella Concorso Internazionale di Composizione
- Algoma Fall Festival
- Algonquin Arts
- Alhambra - Concurso Internacional de Guitarra
- Ali Akbar College of Music / 16th Century Indian Classical Music
- ALIA VOX
- Alicante International Contemporary Music Festival
- Alice Pratt Brown Hall Rice University Shepherd School of Music
- Alisher Navoi State Academic Opera & Ballet Theatre
- All Newton Music School
- All-American Boys Chorus
- Allegheny College
- Allegheny County Summer Concert Series/Hartwood Presents/South Park Mainstage
- Allegheny Summer Music Festival
- Allegro Guitar Series
- Allegro Media Group
- Allegro Music Foundation
- Allegro Vivo - International Chamber Music Festival Austria
- Allen Philharmonic Orchestra & Symphony Chorus
- AllenPR
- Allentown Community Concert Association
- Allentown Symphony Hall
- Allentown Symphony Orchestra
- Alliance Area Concert Association
- Allied Concert Services Inc.
- Allied Live
- Alma College
- Alma College Performing Arts Series
- Alma Education & Arts Foundation
- Almeida Opera
- Almeida Opera (Festival)
- Almonte in Concert
- Alonzo King's LINES Ballet
- Alpenglow Chamber Music Festival
- Alpha-Omega Theatrical Dance Company
- Alphonse Leduc-Robert King Inc.
- ALRY Publications Etc. Inc.
- Altay State Academy of Culture & Fine Arts
- Altay State Musical Comedy Theatre
- Alte Musik Aktuell/Pro Musiqua Antiqua
- Altoona Symphony Orchestra
- Altstadtherbst kulturfestival düsseldorf
- Alverno College
- Alvin Ailey American Dance Theater
- Alys Robinson Stephens Performing Arts Center
- Alys Robinson Stephens Performing Arts Center (Facilities)
- AM Percussion Publications
- Amadeus Chamber Orchestra of Polish Radio
- Amadeus Choir of Greater Toronto
- AmadeusOnline.net
- Amarillo Civic Center
- Amarillo College
- Amarillo Opera
- Amarillo Symphony Orchestra
- Amati Music Festival
- Amazonas Filarmônica
- Amazonas Opera Festival
- Ambassador Tours - An MTS Travel Company
- Ambiente Musikproduktion
- Ambler Symphony
- Amelia Arts Academy
- Amelia at Green Lake Chamber Music Workshop
- Amelia Island Chamber Music Festival
- America's National Music Museum
- America-Israel Cultural Foundation Inc.
- American Academy of Teachers of Singing
- American Accordionists' Association Inc.
- American Art Song Competition for Composers
- American Bach Soloists
- American Bach Soloists (Choral)
- American Bach Soloists Academy
- American Ballet Theatre
- American Bank Center
- American Beethoven Society
- American Bolero Dance Company
- American Brahms Society
- American Brass Chamber Music Association Inc.
- American Choral Directors Association
- American Choral Review
- American Classical Music Hall of Fame
- American Classical Orchestra
- American Classical Orchestra Greenwich
- American College of Musicians
- American Composers Alliance
- American Composers Forum
- American Composers Orchestra
- American Dance Festival
- American Federation of Musicians (AFM)
- American Federation of Musicians of the United States & Canada (AFM Canada)
- American Festival of Microtonal Music
- American Festival of Microtonal Music Inc.
- American Folk Ballet
- American Guild of English Handbell Ringers
- American Guild of Musical Artists (AFL-CIO)
- American Guild of Organists
- American Guild of Organists National Competition in Organ Improvisation
- American Guild of Organists National Young Artists Competition in Organ Performance
- American Guild of Variety Artists (AGVA)
- American Handel Society
- American Harp Society Inc.
- American Landmark Festivals
- American Landmark Festivals (Prof. Org.)
- American Liszt Society Inc.
- American Matthay Association for Piano
- American Mechanical Rights Agency Inc. (AMRA)
- American Music Center Inc.
- American Music Conference
- American Music Corporation
- American Music Festival Albany
- American Music Festival Washington
- American Music Teacher
- American Music Therapy Association
- American Musical Instrument Society
- American Musicological Society Inc.
- American Musicological Society Inc. Noah Greenberg Award
- American Opera Projects Inc.
- American Opera Theater
- American Orff-Schulwerk Association
- American Pianists Association
- American Radio Choir
- American Record Guide/Music in Concert
- American Recorder
- American Recorder Society
- American Repertory Ballet/ARB's Princeton Ballet School
- American Seating Company
- American Society of Composers Authors & Publishers (ASCAP)
- American String Teacher
- American String Teachers Association (ASTA)
- American String Teachers Association National Solo Competition
- American Symphony Orchestra
- American Theatre Organ Society
- American Traditions Competition
- American University Graduate Program In Arts Management
- American University, Dept. of Performing Arts
- American Variety Singers
- American Youth Symphony
- American-International Dance Theatre Inc.
- American-International Lyric Theatre Inc.
- American-Statesman - Austin
- Americans for the Arts
- Americas Society
- Americus Records Inc.
- Amersfoorts Mannenkoor
- Ames City Auditorium
- Ames City Auditorium (Perf. Arts)
- Ames Town & Gown Chamber Music Association
- Amherst Ballet Theatre Company
- Amherst College
- Amherst Early Music
- Amherst Early Music Festival Concert Series
- Amherst Symphony Orchestra
- Amor Artis Inc.
- AMP Concerts
- AMR Jazz Festival
- AMS Planning & Research Corp.
- Amsterdam Area Community Concert Association Inc.
- Amsterdam Baroque Orchestra & Choir
- Amsterdam School of Music (Conservatorium van Amsterdam)
- Amsterdam Sinfonietta
- Amsterdam Symphony Orchestra
- Amsterdamse Hogeschool voor Kunsten
- AMT Public Relations
- Amusement & Music Operators Association
- Amy Marshall Dance Company
- Amy R. Sperling LLC
- An Appalachian Summer Festival
- Anahid Sofian Dance Company
- Analekta Inc.
- Ananda Dansa
- Anchorage - KLEF-FM 98.1 MHz
- Anchorage Concert Association
- Anchorage Festival of Music
- Anchorage Opera
- Anchorage Symphony Orchestra
- Ancilla College
- Anderson Center for the Performing Arts Binghamton University
- Anderson Group International LLC
- Anderson Independent-Mail
- Anderson Symphony Orchestra Association Inc.
- Anderson University
- Andover Chamber Music Series
- Andrea Del Conte Danza España aka The American Spanish Dance Theatre Inc.
- Andrew J. Nemr & CPD Plus
- Andrew Wolf Chamber Music Award
- Andrews University
- Andrews University Symphony Orchestra
- Andrey Sakharov Memorial Music Festival
- Angeles Chorale
- Angelina Arts Alliance
- Angelo State University
- Angers Nantes Opera
- Angevine Acoustical Consultants Inc.
- Anhaltische Philharmonie Dessau
- Anhaltisches Theater Dessau
- Anima Eterna Brugge
- Anima Young Singers of Greater Chicago (formerly The Glen Ellyn Children's Chorus)
- Ankara State Opera & Ballet
- Ankor Youth Choir
- Ann Arbor Blues & Jazz Festival
- Ann Arbor Classical Guitar Society
- Ann Arbor Dance Works
- Ann Arbor Summer Festival
- Ann Arbor Symphony Orchestra
- Ann Whitney Olin Theatre Hatheway Cultural Center Lewis & Clark Community College
- Anna Maria College
- Anna Myer & Dancers
- Annabella Gonzalez Dance Theater Inc.
- Annapolis Chamber Orchestra
- Annapolis Opera Inc.
- Annapolis Symphony Orchestra
- Anne-Marie Mulgrew & Dancers Co. (AMM & DCO)
- Annenberg Center
- Annenberg Theater
- Annie Russell Theatre Rollins College
- Annual Ocean Grove Choir Festival
- Annuario dell'Opera Lirica in Italia (EDT/CIDIM)
- Antares Danza Contemporánea
- Anthon Rubinstein International Piano Competition
- Antigonish Performing Arts Series
- Antioch Chamber Ensemble
- Antioch College
- Anton Bruckner Privatuniversität für Musik, Schauspiel und Tanz
- Antonio Pedrotti - International Competition for Orchestra Conductors
- Anuario VivaMúsica!
- Anúna
- Apollo Chorus of Chicago
- Apollo's Fire, The Cleveland Baroque Orchestra
- Appalachian Ballet Company
- Appalachian State University
- Appalachian State University Performing Arts Series
- Appel Farm Arts & Music Center
- Appel Farm Arts & Music Center (Mus. Schools)
- Appel Farm Arts & Music Center Festival
- Apple Hill Center for Chamber Music
- Apple Hill Center for Chamber Music (Mus. Schools)
- Apple Hill Summer Festival Public Concerts
- Appleton Post-Crescent
- April Jazz Espoo
- Arabesque Contemporary Dance Company
- Arabesque Recordings LLC
- Aram Khachaturian International Competition
- Arapahoe Philharmonic
- Arbiter of Cultural Traditions
- Arcadia Performing Arts
- Arcadian Chorale
- Arcady Music Festival
- Arcana
- ARCH-Opera House of SandwichPerforming Arts for Youth Series (60 performances)
- Archangelus Records
- ARCHI Magazine
- Archipel - Festival des Musiques d'Aujourd'hui
- ArcoDiva Records
- Arcos Communications
- Arcus-Simplex-Brown Inc.
- ARD International Music Competition
- Ardrey Memorial Auditorium Northern Arizona University
- Arena New Music Festival
- Argen-TangoDancersTM
- Arie Crown Theater
- Arion
- Arion Baroque Orchestra
- Arizona Classic Jazz Festival
- Arizona Early Music Society
- Arizona Friends of Chamber Music
- Arizona Opera Company
- Arizona Republic - Phoenix
- Arizona State Univ. Symphony Orchestra & Chamber Orchestra
- Arizona State University
- Arizona State University Public Events
- Arizona Western College Yuma
- Arkansas Democrat-Gazette - Little Rock
- Arkansas State University
- Arkansas State University (Perf. Arts)
- Arkansas Symphony Orchestra
- Arkansas Tech University
- Arleen Auger Memorial Fund Inc.
- Armenian National Opera & Ballet Theatre
- Armenian National Opera & Ballet Theatre (Opera)
- Armenian Philharmonic Orchestra
- Armenian Radio Variety Orchestra
- Armenian State Dance Ensemble
- Armenian String Virtuosi
- Armitage Gone! Dance
- Armonico Consort Opera
- Armstrong Atlantic State University
- Armstrong Auditorium Shenandoah Conservatory of Shenandoah University
- Armstrong International Cultural Foundation
- Arneson River Theatre
- Arnold Hall Theater USAF Academy
- Arnold Schönberg Chor
- Arolser Barock - Festspiele
- Aronoff Center for the Arts & Music Hall
- Ars Electronica festival for arts science & technology
- Ars Flores Symphony Orchestra
- Ars Musica Chorale
- Ars Musica International Festival of Contemporary Music
- Ars Nova Copenhagen
- Ars Nova Digital
- Ars Nova Musicians Chamber Orchestra
- Arsis Audio
- Art & Culture Center of Hollywood
- Art & Music; Sundays Live; Friday Night Jazz; Latin Sounds
- Art Academy of Novi Sad
- Art Center Chamber Music Concerts Inc.
- Art Complex Museum
- Art Song Festival
- Art Song Festival at Baldwin-Wallace College
- ART-MANAGER
- Artcore
- Arte Flamenco Dance Theatre
- Artec Consultants Inc
- Artek Recordings
- Artemus W. Ham Concert Hall UNLV
- ArtEZ Conservatorium Zwolle
- Arthaus Musik GmbH
- Arthur Rubinstein Philharmonic Orchestra
- Artifax Software Inc.
- ArtistManager.Net - Professional Websites (from Kulture Shock Media)
- Artists International's Annual New York Debut Award Auditions
- Artists Music Publications
- Artists Showcase West presented by the Downers Grove Concert Association
- Artown Festival
- Artpark
- Artpark Festival
- ArtPower! at UC San Diego
- Arts & Culture Centre
- Arts & Culture Centre (Perf. Arts)
- Arts Association Inc. in Newton County
- Arts at Argonne - Chamber Music Series
- Arts at St. Ann's
- Arts Center of Coastal Carolina
- Arts Center of Coastal Carolina (Facilities)
- Arts Center/Old Forge (Arts Guild of Old Forge Inc.)
- Arts Consulting Group Inc.
- Arts Council for Chautauqua County
- Arts Council for the Northern Adirondacks
- Arts Council of Central Louisiana
- Arts Council of Moore County Classical Concert Series
- Arts Council of Oklahoma City/Stage Center Theater
- Arts Council of the Morris Area
- Arts Council of Tuscaloosa Bama Fanfare
- Arts Council of Washington County
- Arts Council of York County
- Arts For The Schools
- Arts Management
- Arts Management Systems Ltd.
- Arts Marketing Network
- Arts Midwest
- Arts Music eK
- Arts News
- Arts Northwest
- Arts Place Inc.
- Arts Professional
- Arts Square Winter Festival
- Artsmarketing Services Inc.
- ARTSNET
- ArtsPass.com/MyBroadway.com
- Artsplosure 04
- Artspromo
- ARTSwego Performing Arts Series & Ke-nekt' Chamber Music Series
- Arturo Duo Vital International Chamber Music Composition Prize
- Arturo Toscanini Concorso Internazionale di Direzione d'Orchestra (Arturo Toscanini International Competition for Conductors)
- Arup Acoustics Theatre Consulting
- Arvada Center for the Arts & Humanities
- Arvada Center for the Arts & Humanities (Facilities)
- As Palavras-Compagnie Claudio Bernardo
- As Soon As Possible (formerly the Bordeaux Jazz Festival)
- Asbury College
- Asbury College Artist Series
- Asbury Park Press
- ASCAP Foundation Morton Gould Young Composer Awards
- ASCAP Foundation Rudolf Nissim Prize
- ASCAP Foundation Young JAZZ Composer Awards
- ASCAP/CBDNA Frederick Fennell Prize for the Best Original Score for Concert Band
- ASCAP/Lotte Lehmann Foundation Artsong Composition Contest
- Ascencion Recordings Inc.
- Ash Lawn Opera Festival
- Ash Lawn Opera Festival (Festivals)
- Ashdod Symphony Orchestra
- Asheville Bravo Concerts
- Asheville Chamber Music Series
- Asheville Lyric Opera
- Asheville Symphony Orchestra
- Ashi-Tolkyny Folklore-Ethnographic Ensemble
- Ashland Chamber Music Workshop
- Ashland Symphony Orchestra
- Ashtabula Arts Center
- Asia America Symphony Orchestra
- Asia Philharmonic Orchestra (APO)
- Asia Society Cultural Programs
- Asian American Philharmonic Orchestra
- Asian Music
- Asian Youth Orchestra
- Asko
Schönberg - ASM (Alfredo de Saint Malo) Festival
- Asociacíon Bilbaína de Amigos de la Opera
- Aspects des Musiques d'Aujourd'hui
- Aspekte Salzburg
- Aspen Chamber Symphony Aspen Festival Orchestra
- Aspen Music Festival & School
- Aspen Music Festival & School (Festivals)
- Aspen Music School Summer Program
- Aspen Opera Theater Center
- Aspen Santa Fe Ballet
- Aspendos International Opera & Ballet Festival
- Associated Students of Centralia College (ASCC)
- Association for Recorded Sound Collections Inc.
- Association of California Symphony Orchestras (ACSO)
- Association of Canadian Women Composers
- Association of Performing Arts Presenters
- Astana Philharmonia Folk Instruments Orchestra
- Astana Philharmonia Folklore Instrumental Ensemble Ak Orda
- Astana Symphony Orchestra of the State Philharmonia
- Aston Magna Festival
- Astor Street Software
- Astoria Symphony
- Astrakhan State Music Conservatory
- Astrakhan State Music Theatre
- Astral Artists
- Astral Artists
- Astral Artists National Roster Auditions
- Astral Artists' Concert Series
- AT&T LoDo Music Festival
- AT&T Performing Arts Center
- AT&T Performing Arts Center (Facilities)
- Atelier du Rhin
- Atelier Lyrique de Tourcoing
- Aterballetto
- Athenaeum Music & Arts Library
- Athenaeum Theatre
- Athens International Opera Gala Performing
- Athens State Orchestra
- Atherton Auditorium/Lewis Theatre/Horton Gallery
- Atlanta Ballet
- Atlanta Boy Choir
- Atlanta Civic Center
- Atlanta Journal-Constitution
- Atlanta Symphony Orchestra
- Atlanta Symphony Orchestra Chorus
- Atlanta Symphony Youth Orchestra
- Atlanta Young Singers of Callanwolde
- Atlantic Ballet Theatre of Canada
- Atlantic Center for the Arts
- Atlantic City Ballet
- Atlantic Classical Orchestra
- Atlantic Jazz Festival Halifax
- Atlantic Symphony Orchestra
- Atlantic Union College Thayer Performing Arts Center, Thayer Conservatory of Music
- Atoll Ltd.
- Attergauer Kultursommer
- Attila Glatz Concert Productions Inc.
- Auburn Arts Commission
- Auburn Chamber Music Society
- Auburn Symphony
- Auckland Philharmonia Orchestra
- AudienceView Ticketing
- AudienceWorks/MoonRoad LLC
- AudiMozart! International Wind Competition
- Audio Engineering Society Inc.
- Audite Musikproduktion
- Auditorium Chamber Music Series
- Auditorium Theatre
- Auditorium Theatre of Roosevelt University
- Auditorium Theatre of Roosevelt University (Facilities)
- Audrey Ross/Publicity
- Auerbach-Pollock-Friedlander
- Augsburg College
- Augsburg College Music Department
- Augsburg Fortress Publishers
- Augusta Ballet
- Augusta State University
- Augusta Symphony Orchestra
- Augustana Arts
- Augustana Choir
- Augustana College Rock Island
- Augustana College Sioux Falls
- Augustana Symphony Orchestra
- Aurinkobaletti
- Aurora Fox Arts Center
- Aurora University: Celebrating Arts & Ideas
- Austin - Classical 89.5 KMFA 89.5 MHz
- Austin Chamber Music Center
- Austin Chamber Music Festival
- Austin Chamber Music Workshop
- Austin Civic Orchestra Society
- Austin Classical Guitar Society
- Austin College
- Austin Lyric Opera
- Austin Peay State University
- Austin Peay State University/Clarksville Community Concert Artist Series
- Austin Symphony Orchestra
- Austin Symphony Orchestra Society Inc.
- Australian Boys Choir
- Australian Brandenburg Orchestra
- Australian Chamber Orchestra
- Australian Dance Theatre
- Australian Festival for Young People aka Come Out
- Australian Festival of Chamber Music
- Australian National Academy of Music
- Australian National Univ. - School of Music
- Australian Opera & Ballet Orchestra
- Australian Pops Orchestra (AusPops)/Australian Philharmonic Orchestra
- Austrian-Hungarian Haydn Philharmonic
- Avanti! Chamber Orchestra
- Avanti! Summer Sounds
- Ave Sol, The Riga City Chamber Choir Professional Group
- Avery Fisher Artist Program
- Avie Records
- Avignon Festival
- AXIS Dance Company
- Azerbaijan Folk Music Theatre Mugam
- Azerbaijan State Dance Ensemble
- Azerbaijan State Univ. of Arts & Culture
- Azerbaijan State Variety Orchestra `Gaya'
- Azusa Pacific University