コンパクトカセット
Philips' development of the Compact Cassette in 1963 and Sony's development of the Walkman in 1979 led to widespread consumer use of magnetic audio tape. In 1990, the Compact Cassette was the dominant format in mass-market recorded music. The development of Dolby noise reduction technology in the 1960s brought audiophile quality recording to the Compact Cassette also contributing to its popularity.