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Comparison of audio coding formats - Wikipedia
https://en.wikipedia.org/wiki/Comparison_of_audio_coding_formats
8 kHz 32 kbit/s 13 bit Yes No No No G.722: sub-band ADPCM, Lossy: 16 kHz 64 kbit/s (comprises 48, 56 or 64 kbit/s audio and 16, 8 or 0 kbit/s auxiliary data) 14 bit 4 ms Yes No No No G.722.1: Modulated Lapped Transform (MDCT), Lossy (based on Siren Codec) 16 kHz 24, 32 kbit/s 16 bit 40 ms Yes No No No G.722.1C
Audio frequency - Wikipedia
https://en.wikipedia.org/wiki/Audio_frequency
An audio frequency or audible frequency (AF) is a periodic vibration whose frequency is in the band audible to the average human, the human hearing range.The SI unit of frequency is the hertz (Hz). It is the property of sound that most determines pitch.. The generally accepted standard hearing range for humans is 20 to 20,000 Hz. In air at atmospheric pressure, these represent …
Audio bit depth - Wikipedia
https://en.wikipedia.org/wiki/Audio_bit_depth
For example, for a 20 kHz analog audio sampled at 4× oversampling with second-order noise shaping, the dynamic range is increased by 30 dB. Therefore, a 16-bit signal sampled at 176 kHz would have a bit depth equal to a 21-bit signal sampled at 44.1 kHz without noise shaping. Noise shaping is commonly implemented with delta-sigma modulation.
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