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
Gilbert and Sullivan [The words'] precise degree of levity and distance from reality ... seemed to be expressed ... in the very notes of the music; almost ... in the note of the laughter that followed it." In 1957, a review in "The Times" gave this rationale for "the continued vitality of the Savoy operas": Because of the unusual success of the operas, the D'Oyly Carte Opera Company were able, from the start, to license the works to other professional companies, such as the J. C. Williamson Gilbert and Sullivan Opera Company, and to amateur troupes. For almost a century, until the British