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 other's, and partly caused by the opposing personalities of the two—Gilbert was often confrontational and notoriously thin-skinned (though prone to acts of extraordinary kindness), while Sullivan eschewed conflict. In addition, Gilbert imbued his libretti with "topsy-turvy" situations in which the social order was turned upside down. After a time, these subjects were often at odds with Sullivan's desire for realism and emotional content. Also, Gilbert's political satire often poked fun at the wealthy and powerful whom Sullivan sought out for friendship and patronage. Gilbert and Sullivan disagreed several times over the choice of a subject. After both "Princess Ida"