It is very similar to MO, except that MD uses data compression technology. The principle of data compression is based on the amplitude masking and time masking effects of sound, and removes redundant and irrelevant information without the actual listening meaning due to the masking effect, which can save a considerable part of the storage space. When recording, first heat it with a laser to demagnetize the magnetic material on the disk and re-magnetize it through the magnetic head. The shock resistance of the MD is also very good and it is very convenient to use.
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