THE FIRST BATTERY-DRIVEN PORTABLE source of sound and music was the transistor radio of the 1950s. In the 1970s, the magnetic audio cassette tape allowed recordings to be played on portable tape players. Also, new metal alloys permitted the tiny but high-power magnets needed for lightweight earphones. In the 1980s, compact discs brought music into the digital era. Sony’s MD, or minidisc, introduced rerecordable CDs that used magnetic and optical technology. From the mid 1990s, music could be stored in all-electronic digital form in a microchip, usually in the MP3 file format. These files can be transferred between devices and via the Internet. Today, a variety of portable media gadgets can record, play, and store video, photographs, and music in electronic form.
Personal music and video
in
THE MODERN WORLD
published on 8:43 AM
THE FIRST BATTERY-DRIVEN PORTABLE source of sound and music was the transistor radio of the 1950s. In the 1970s, the magnetic audio cassette tape allowed recordings to be played on portable tape players. Also, new metal alloys permitted the tiny but high-power magnets needed for lightweight earphones. In the 1980s, compact discs brought music into the digital era. Sony’s MD, or minidisc, introduced rerecordable CDs that used magnetic and optical technology. From the mid 1990s, music could be stored in all-electronic digital form in a microchip, usually in the MP3 file format. These files can be transferred between devices and via the Internet. Today, a variety of portable media gadgets can record, play, and store video, photographs, and music in electronic form.
