Gilbert and Sullivan of these recordings have been reissued on CD. After the company was revived in 1988, it recorded seven of the operas. After the copyrights on the operas expired, numerous companies around the world released popular audio and video recordings of the operas. In 1966 and again in the 1980s, BBC Radio presented complete cycles of the thirteen extant Gilbert and Sullivan operas, with dialogue. Ad hoc casts of operatic singers conducted by Sir Malcolm Sargent in the 1950s and 60s and Sir Charles Mackerras in the 1990s have made audio sets of several Savoy operas, and in the 1980s Alexander
Arthur Sullivan Gilbert and Sullivan opera, "The Mikado", followed by eight more. Electrical recordings of most of the operas issued by HMV and Victor followed from the 1920s, supervised by Rupert D'Oyly Carte. The D'Oyly Carte Opera Company continued to produce recordings until 1979. After the copyrights expired, recordings were made by opera companies such as Gilbert and Sullivan for All and Australian Opera, and Sir Malcolm Sargent and Sir Charles Mackerras each conducted audio sets of several Savoy operas. Since 1994, the International Gilbert and Sullivan Festival has released professional and amateur CDs and videos of its productions and other Sullivan