In the sixties, two important tape-based consumer formats emerged. One was the four- or eight-track tape. These tape players began to appear in cars (and Lear jets—Bill Lear had the technology developed for his line of corporate jets) in 1965 and remained popular through the seventies. The other, more enduring playback device was the audiocassette. A number of manufacturers, most notably Philips, Sony, and Grundig, worked to develop cassettes and cassette players and to come up with an industry standard. By the seventies, this new technology had caught on: cassette sales grew much faster than LPs (vinyl) and by 1982 exceeded them.
This new format had many advantages. The units were smaller, and so were the playback devices. Some were portable; others went into car consoles. By the mid-seventies, boom boxes had appeared, offering a portable and low-priced alternative to the home stereo. The first Walkman came from the Sony factory in 1979; other companies quickly followed suit. All of these devices made listeners’ personal recordings as accessible as the radio.
Moreover, cassette players also made it possible for consumers to assemble their own playlists, using blank tapes. With improvements in recording quality, most notably Dolby noise reduction technology, there was less loss in fidelity during copying. People could now take their music with them wherever they went.