unless the quantity required was very small, pressed discs were a more economical medium for distributing high-quality audio than tape, and cd mastering was, in the early years of that technology, very expensive, so the use of lp-format transcription discs continued into the 1990s. the "king biscuit flower hour" is a late example, as are westwood one's "the beatle years" and "doctor demento" programs, which were sent to stations on lp at least through 1992.