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Cassette tapes are made of a polyester-type plastic film with a magnetic coating. The original magnetic material was based on gamma ferric oxide (Fe 2 O 3 ). Circa 1970, 3M Company developed a cobalt volume-doping process combined with a double-coating technique to enhance overall tape output levels.
Analog based . Cassette tape, a two-spool tape cassette format for analog audio recording and playback and introduced in 1963 by Philips; DC-International, a format that was created by Grundig after Phillips had abandoned an earlier format that was being created alongside the Compact Cassette
Real cassette tapes invariably deviate from the references and require fine tuning of bias; recording a tape with improper bias increases distortion and alters frequency response. [26] A 1990 comparative test of 35 Type I tapes showed that their optimal bias levels were within 1 dB of the Type I reference, while Type IV tapes deviated from the ...
Three rediscovered cassette tapes containing recordings of The Beatles in 1966 are expected to fetch between £10,000 and £15,000 at auction ... Judy Greer reveals she turned down a 'Modern ...
Also, there is a sliding write-protect tab on the DCC to enable and disable recording. Unlike the break-away notches on analog compact cassettes and VHS tapes, this tab makes it easier to make a tape recordable again, and unlike on analog compact cassettes, the marker protects the entire tape rather than just one side.
The original standard microcassette, the MC60, gives 30 minutes recording per side at its standard speed of 2.4 cm/s, and double that duration at 1.2 cm/s; an MC90, giving 45 minutes per side @ 2.4 cm/s, is also available from a few manufacturers.
Many early microcomputer and home computer systems used cassette tapes as an inexpensive magnetic tape data storage system. This article lists some of the historically notable formats. As interoperability between platforms was difficult, there was little purpose to, or effort expended on, using standardized formats.
Cassette tapes are not vulnerable to scratching from handling (though the exposed magnetic tape is vulnerable to stretching from poking), and play from where they were last stopped (though some modern MP3 players offer savestating electronically). Cassette tapes can also be recorded multiple times (though some solid-state digital recorders are ...
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