13 Outline
The advantages of digital techniques were first realized in the field of magnetic recording. Analog magnetic recording creates significant deterioration of the original sound: using analog techniques, for example, it is difficult to obtain a flat frequency response at all signal levels. Furthermore, the signal-to-noise ratio is limited to some 70 dB, the sound deteriorates by speed variations of the recorder mechanism, crosstalk and print-through problems arise, and any additional copying deteriorates the characteristics even further. In addition to this, to keep the equipment within close specifications, as required in a professional environment, frequent and costly realignment and maintenance are required.
Digital magnetic recording, ...
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