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The main characteristics of digital audio

 1. High SNR

A digital audio record form is a binary code that can be replayed only with a "0" or "1". Therefore, the noise of the recording medium has little influence on the signal-to-noise ratio of the replay signal. The analog audio recording form is a continuous sound signal, which will be affected by the noise of the tape in the recording process, which will be superimposed on the sound signal to make the sound quality worse. Although noise reduction measures are adopted in the analog sound system, they cannot be eliminated fundamentally. 2. Low distortion

In the process of analog audio recording, the nonlinearity of the magnetic head can be introduced to the distortion, and the communication bias recording is required, but the distortion still exists. In digital audio, the magnetic head only works in the magnetic saturation and non-magnetic state, indicating 1 and 0, there is no linear requirement for the magnetic head.

3. Good repeatability

Digital audio equipment has been copied and replayed many times and the sound quality is not degraded. The traditional analog cassette tape recording, every dubbing, tape record the noise will be increased, which every dubbing lower signal-to-noise ratio is about 3 db, subband than master, sun belt as subband, quality of successive degradation.

4. Wobble rate is small

The system of digital audio playback system, due to the time base correction circuit, rotation system, the instability of the driving system will not cause shaking, so it does not need to require the precise mechanical system like the analog record.

5. Adaptable

The digital audio record is the binary code, various processing can be used as numerical computation, and not change the hardware, only use software operation, convenient microcomputer control, so the adaptability is strong.

6. Facilitate integration

Because of the digitization, it is easy to adopt the large scale integrated circuit, and make the whole machine easy to debug, stable performance, high reliability, convenient for mass production, can reduce the cost.

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