Tape Bias

Tape bias is the term for two phenomena, DC bias and AC bias, that improve the fidelity of analogue magnetic tape sound recordings. DC bias is the addition of a direct current to the audio signal that is being recorded. AC bias is the addition of an inaudible high-frequency signal (generally from 40 to 150 kHz) to the audio signal. Magnetic tape has a nonlinear response at low signal strengths, as measured by its coercivity. Bias increases the signal quality of most audio recordings significantly by pushing the signal into the linear zone of the tape's transfer function.

Read more about Tape BiasHistory, Theory, Practice

Other articles related to "tape bias, bias":

Tape Bias - Practice
... of the recording system change quite markedly as the level of the bias current is changed ... the system gives the minimum distortion (which is the highest bias) ... There is also a level at which the high frequency response is at maximum (lowest bias) ...

Famous quotes containing the words bias and/or tape:

    The solar system has no anxiety about its reputation, and the credit of truth and honesty is as safe; nor have I any fear that a skeptical bias can be given by leaning hard on the sides of fate, of practical power, or of trade, which the doctrine of Faith cannot down-weigh.
    Ralph Waldo Emerson (1803–1882)

    I could buy one
    Tape and get another free. I accept- Ed the deal, paid for one tape and
    Chose a free one. But since I’ve been
    Repeatedly billed for my free tape.
    John Ashbery (b. 1927)