Review #8 (Digital Audio)

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The Music Telegraph
Text 2019-04-18



Review #8 (Digital Audio) 


1. What is the standard sampling frequency and quantization level of CDs?

-> 44.1 kHz, 16 bit



2.  What is the dynamic range of the 24bit digital signal?

-> 144 dB (24 x 6 dB)



3. What is the parameter related to the number of quantizations in digital audio?

-> S/N ratio (Signal-to-Noise ratio)



4. What's the advantage of digital audio?

-> The sound quality is not degraded even if copied several times

-> Have a small crosstalk

-> There is no level fluctuation



5. What is the standard level of digital audio devices?

-> 0 dBFS (DeciBels relative to Full Scale (dBFS or dB FS) is a unit of measurement for amplitude levels in digital systems)



6. What is the auditory effect used in MP3 encoding process of audio signal?

-> Masking effect



7. If you want to play audio signals up to 10 kHz in digital audio equipment, how many Hz should the sampling frequency be set?

-> 20 Hz



8. What is the digital interface used in CD, DAT, and most of the two-channel professional equipments, and have the connector which is an XLR type used in microphone cables?







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