In the sound recording time 30 times that SONY
SONY MD which approximately 40 hours of present 30
times can be recorded in 1 disk (the minidisk) developed new
technology. As the equipment and the disk are sold within year,
as a new standard adoption is approached also other manufacturer such
as Matsushita Electric Industrial Co., Ltd..
Attendant upon the spread of Internet transmission of
music, the music which the American apple computer takes in from the
personal computer 1 ten thousand tunes (600 - 700 hours) the hard disk
which can be recorded (HD) the portable audio equipment of built-in
type is sold, popularity is gained in the United States and Japan.
SONY opposes with the long haul conversion of MD.