Tape recorder noise refers to the noise that appears in the recorder horn when there is no signal, mainly including background noise, modulation noise and amplitude modulation noise. Because of the instability of the mechanical movement of the magnetic tape during operation, it is bound to shake. It means that the recording signal is frequency-modulated to generate FM noise. The inhomogeneity and non-linearity of tapes, heads, and recording and playback systems can also cause amplitude modulation of the magnetic remanence and reproduced signal voltages on the tape, causing AM noise. The solution is to improve the quality of tapes and heads, ensure that the tape runs smoothly, and select the best AC bias.
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