Most of the music played by radio stations back in these days came eigther from magnetic tapes
Magnetic Tape does not just mean cassette tape. The Analogue tapes we sued to use in the studio ran at 3 time the speed of a cassette tape and recorded to an area 4 or 5 times larger. Also the magnetic media was some chrome mixture.
Professional Audio Magnetic tape is almost as good as a 24bit 96Khz digital recording :-D
