Introduced by Olympus in 1969 for voice recording, the microcassette uses the same width of magnetic tape as the Compact Cassette (3.81mm) but in a much smaller shell. By using thinner tape and half or a quarter of the tape speed, microcassettes can offer comparable recording time to the Compact Cassette. The original standard microcassette, the MC60, gives 30 minutes recording per side at its standard speed of 2.4 cm/s, and twice the time at 1.2 cm/s.
Because of the format’s relatively low fidelity, microcassettes have mostly been used for recording voice, for example in dictation machines and telephone answering machines. However, it has also been used as a medium for computer data storage and music. In the early 1980s, some Walkman-type devices, and even some home audio players for stereo recording and playback were produced, and metal tape microcassettes (equivalent to Type IV metal tape in Compact Cassettes) were available for higher fidelity.
Microcassette was more suited to data and music recording than the Mini-Cassette as the tape is pulled through by the capstan and has a more constant speed, whereas in the Mini-Cassette, the tape is pulled by the reels.
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