Organizations
NOTE: This list does not purport to be exhaustive. To add an organization to this list, please e-mail its name and web address to: codell@loc.gov.
Academy of Country Music
http://www.acmcountry.com 
Academy of Recording Arts and Sciences
http://www.grammy.com
AHRC Research Centre for Musical Performance as Creative Practice
http://www.cmpcp.ac.uk/
American Folklife Society
http://www.afsnet.org
American Musicological Society
http://www.ams-net.org
ASCAP
http://www.ascap.com
Association des detenteurs de documents audiovisuels et sonares
http://www.openedition.org/?id=7460&lang=en
Association for Recorded Sound Collections (ARSC)
http://www.arsc-audio.org/
Association of Professional Recording Services (APRS)
http://www2.aprs.co.uk
Association of Research Libraries
http://www.arl.org/preserv/sound_savings_proceedings/Digital_audio.shtml
Audio Engineering Society (AES)
http://www.aes.org
Australian Screen Sound Guild
http://www.assg.org.au
Australian Sound Recordings Association (ASRA)
http://www.asra.asn.au
Baltic Audiovisual Archival Council (BAAC)
http://www.baacouncil.org/index.php?m=28
Bluegrass Foundation
http://www.bluegrassfoundation.org
Blues Foundation
http://blues.org
British Kinematographic Sound and Television Society (BKTS)
https://nt12.orbital.net/bksts/about.asp
Broadcast Education Association (BEA)
http://www.BEAweb.org
Canadian Antique Phonograph Society (CAPS)
http://www.capsnews.org/
City of London Phonograph and Gramophone Society
http://www.clpgs.org.uk
Coordinating Council of Audiovisual Archives Associations
http://www.ccaaa.org
Country Music Association
http://www.cmaworld.com/Homepage
Country Music Foundation
http://countrymusichalloffame.org
Digital Media Association
http://digmedia.org
European Broadcasting Union (EBU)
http://www.ebu.ch
Gospel Music Foundation
http://www.gmahalloffame.org/site
Idelsohn Society for Musical Preservation
http://www.idelsohnsociety.com
Institut national de l'audiovisuel (INA)
http://www.ina.fr
International Association of Music Libraries, Archives and Documentation Centres (IAML)
http://www.iaml.info
International Association of Sound and Audiovisual Archives (IASA)
http://www.iasa-web.org
International Center for the Study of Preservation and Restoration of Cultural Property (ICCROM)
http://www.iccrom.org
International Conference on Archives (ICA)
http://www.ica.org
International Federation of Library Associations
http://www.ifla.org
Joint Technical Symposium (JTS)
http://www.jts2010.org
Living Traditions
http://www.livingtraditions.org
Media Communications Association-International (MCA-I)
http://www.mca-i.org
National Academy of Recording Arts and Sciences
http://www.grammy.com
National Association of Broadcasters (NAB)
http://www.Nab.org
National Religious Broadcasters
http://nrb.org
Opera Foundation
http://www.operafoundation.org
Performance Poetry Preservation Project, Inc.
http://www.PoetryPreservation.org
Popular Music Foundation (Russian)
http://musicarussia.org
REC Music Foundation
http://www.recmusic.org/Welcome.html
Recording Industry Association of American
http://www.riaa.com
SESAC
http://www.sesac.com
Singout.org
http://www.singout.org
Society for American Music
http://www.american-music.org
Society for Ethnomusicology
http://webdb.iu.edu/sem/scripts/home.cfm
Societe francaise d’Ethnomusicologie
http://www.ethnomusicologie.fr
Society of American Archivists
http://www2.archivists.org
Society of Broadcast Engineers (SBE)
http://www.sbe.org
Sound Preservation Society of Tasmania
http://www.collectionsaustralia.net/org/583/about
Southwest Asia-Pacific Audiovisual Archives Association (SEAPAVAA)
http://www.seapavaa.com
Texas Folk Music Foundation
http://www.tfmf.org
UNESCO
http://www.unesco.org/new/en/unesco
World Classical Music Foundation
http://www.worldclassicalmusicfoundation.org
Additional organizations, mainly musical in nature, can be accessed via:
http://www.musicoutfitters.com/musicorganizations.htm