In 1992 Sony launched the MiniDisc (MD) as an attempt to replace audio cassette technologies. The MiniDisc was developed based on magneto-optical storage media that allowed for writing and rewriting of stored information. The fact that the data could be quickly accessed without the need to scroll through an entire tape made this technology very promising for ease of use over the cassette. The data compression format known as ATRAC (Adaptive Transform Acoustic Coding) was used to allow the audio files to fit on the MiniDisc. In fact, at the SP compression ratio of 292kbps, 60 to 80 minutes of music could be stored on a single disk. Even at CD quality, 20 to 28 minutes of music could be stored on the MiniDisc.
The first MiniDisc based machine was the MZ-1 recorder. The problem with this machine was mainly that it had a cost of more than $750.00. It had an optical line input, audio line input, and microphone input jack. It had an audio output. Some of the earliest versions had an optical line output, but this feature was discontinued. Sony licensed MiniDisc tecnhology to a variety of companies such as Sharp, Panasonic, and Kenwood. It was only a matter of time before all of...
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