The ASU Music Library has a growing selection of materials about Asian music. Try a subject search on "music asia." For some countries (marked * and in green on the map), we have enough materials for a more in-depth study. Other listed countries (yellow on the map) have at least one recording or text.
General Sources:
The best general reference book on African music is Asia, volumes four, five and seven the Garland Encyclopedia of World Music (Music Reference ML 100 .G16 1998). A CD is included with each volume. See also "popular music south asia."
Bangladesh
Bhutan
Cambodia
China
India
Indonesia
Japan
Korea (North and South)
Laos
Malaysia
Mongolia
Myanmar (Burma)
Nepal
Philippines
Taiwan
Thailand
Tibet
Vietnam