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Tape bias -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-10-21) |
 | | Tape bias is a high-frequency signal (generally from 40 to 150 (One thousand periods per second) kHz) added to the (The sound elements of television) audio signal recorded on an analog (A magnetic recorder using magnetic tape) tape recorder. |
 | | As the tape leaves the (Click link for more info and facts about tape head) tape head, the bias partially demagnetizes the tape and the remaining net induction is essentially the difference between the positive and negative half-cycles of the previously recorded. |
 | | Different levels of bias are needed for different types of tape, so most recorders offer a bias setting switch on the front panel, or, in the case of the (Click link for more info and facts about compact audio cassette) compact audio cassette, may switch automatically according to cutouts on the cassette shell. |
| www.absoluteastronomy.com /encyclopedia/t/ta/tape_bias.htm (205 words) |