MiniDisc

MiniDisc (MD) is a magneto-optical disc-based data storage format offering a capacity of 60, 74 minutes and, later, 80 minutes, of digitized audio or 1 gigabyte of Hi-MD data. Sony brand audio players were on the market in September 1992. MiniDisc (MD) is a magneto-optical disc-based data storage format offering a capacity of 60, 74 minutes and, later, 80 minutes, of digitized audio or 1 gigabyte of Hi-MD data. Sony brand audio players were on the market in September 1992. Sony announced the MiniDisc in September 1992 and released it in November of that year for sale in Japan and in December in Europe, Canada, the USA and other countries. The music format was originally based on ATRAC audio data compression, but the option of linear PCM digital recording was later introduced to meet audio quality comparable to that of a compact disc. MiniDiscs were very popular in Japan and found moderate success in Europe. Sony has ceased development of MD devices, with the last of the players sold by March 2013. In 1983, just a year after the introduction of the Compact Disc, Kees Schouhamer Immink and Joseph Braat presented the first experiments with erasable magneto-optical Compact Discs during the 73rd AES Convention in Eindhoven. It took, however, almost 10 years before their idea was commercialized. Sony's MiniDisc was one of two rival digital systems, both introduced in 1992, that were targeted as replacements for the Philips Compact Cassette analog audio tape system: the other was Digital Compact Cassette (DCC), created by Philips and Matsushita. Sony had originally intended Digital Audio Tape (DAT) to be the dominant home digital audio recording format, replacing the analog cassette. Due to technical delays, DAT was not launched until 1989, and by then the U.S. dollar had fallen so far against the yen that the introductory DAT machine Sony had intended to market for about $400 in the late 1980s now had to retail for $800 or even $1000 to break even, putting it out of reach of most users. Relegating DAT to professional use, Sony set to work to come up with a simpler, more economical digital home format. By the time Sony came up with MiniDisc in late 1992, Philips had introduced a competing system, DCC. This created marketing confusion very similar to the Betamax versus VHS battle of the late 1970s and early 1980s. Sony attempted to license MD technology to other manufacturers, with JVC, Sharp, Pioneer, Panasonic and others all producing their own MD systems. However, non-Sony machines were not widely available in North America, and companies such as Technics and Radio Shack tended to promote DCC instead. Despite having a loyal customer base largely of musicians and audio enthusiasts, MiniDisc met with only limited success in the United States. It was relatively popular in Japan and the United Kingdom during the 1990s, but did not enjoy comparable sales in other world markets. Since then, recordable CDs, flash memory and HDD and solid-state-based digital audio players such as iPods have become increasingly popular as playback devices.