1. High signal-to-noise ratio: The digital audio recording format is binary code, and only "0" or "1" needs to be judged during playback. Therefore, the noise of the recording medium has almost no effect on the signal-to-noise ratio of the reproduced signal. The analog audio recording form is a continuous sound signal, which will be affected by such as tape noise during the recording and playback process. It must be superimposed on the sound signal to make the sound quality worse. Although noise reduction measures have been taken in the analog audio, it cannot be fundamentally affected. To be eliminated.
2. Low distortion: In the process of analog audio recording and playback, the non-linearity of the magnetic head will introduce distortion. For this reason, measures such as AC bias recording must be taken, but the distortion still exists. In digital audio, the magnetic head only works in two states of magnetic saturation or non-magnetic, indicating 1 or 0, and there is no linear requirement for the magnetic head.
3. Good repeatability: The sound quality of digital audio equipment will not be degraded after repeated copying and playback. In traditional analog cassette tape recording, the noise recorded on the tape will increase every time it is dubbed. As a result, the signal-to-noise ratio of each dubbing will be reduced by about 3 dB. Degrade.
4. Low jitter rate: The digital audio playback system will not cause jitter due to the time base correction circuit, the rotation system, and the instability of the drive system, so there is no need to require a precision mechanical system like the analog recording.
5. Strong adaptability: Digital audio records are binary codes, and various processing can be performed as numerical calculations, and can be operated only by software without changing the hardware, which is convenient for microcomputer control, so it has strong adaptability.
6. Easy to integrate: due to digitalization, it is easy to use VLSI, and the whole machine is easy to debug, stable in performance, high in reliability, easy to mass production, and can reduce costs.
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