Radio shows were first syndicated on reel to reel tape, later on LP stereo discs, then CD's and now digitally. Collectors can no longer get their hands on this quality material so the surviving shows that are available will keep going up and up in value. These radio shows were never intended for public use & most were destroyed or returned to the manufacturer after use, so they're very difficult to find.
The King Biscuit Flower Hour was broadcast on Sunday nights from 1973 until 2007. During its prime, the program was carried by more than 300 radio stations throughout the United States. The show's name was derived from the influential blues radio show "King Biscuit Time", which was sponsored by the King Biscuit Flour Co., and the hippie phrase "flower power". The first show was broadcast on February 18, 1973. The long-time host of the show was Bill Minkin.
The concerts were usually recorded with a mobile recording truck, then mixed and edited for broadcast on the show within a few weeks. In the 1970s, the show was sent to participating radio stations on reel-to-reel tape. Some shows were recorded and mixed in both stereo and quadraphonic. In 1980, D.I.R. began using the LP format, producing the show on a three-sided, two record set. The first show on compact disc was broadcast on September 27, 1987. By the year 2000, King Biscuit was using CD-R media to distribute the show. These tapes, records or compact discs were accompanied by a cue sheet which gave the disc jockey a written guideline of the content and length of each segment of the program.