Sampling Rate:
The audio sampling rate refers to the number of times the recording device samples the sound signal in one second. The higher the sampling frequency, the more realistic the sound is restored. In today's mainstream acquisition cards, the sampling frequency is generally divided into five levels of 11025Hz, 22050Hz, 24000Hz, 44100Hz, 48000Hz, 11025Hz can achieve the sound quality of AM AM broadcast, and 22050Hz and 24000HZ can achieve the sound quality of FM FM broadcast. The 44100Hz is the theoretical CD quality limit, and the 48000Hz is more accurate.
In the field of digital audio, the commonly used sampling rates are:
8,000 Hz - the sampling rate used by the phone, enough for people to speak
11,025 Hz-Sample rate used for AM broadcasting
22,050 Hz and 24,000 Hz-Sample rate used by FM radio broadcast
32,000 Hz - miniDV digital video sampling rate used by camcorder, DAT (LP mode)
44,100 Hz - Audio CD, also commonly used for sampling rates used in MPEG-1 audio (VCD, SVCD, MP3)
47,250 Hz - Sample rate used by commercial PCM recorders
48,000 Hz - Sample rate for digital sound used in miniDV, digital TV, DVD, DAT, movies, and professional audio
50,000 Hz - sample rate used by commercial digital recorders
96,000 or 192,000 Hz - Sample rate used for DVD-Audio, some LPCM DVD tracks, BD-ROM (Blu-ray Disc) tracks, and HD-DVD (High Definition DVD) tracks
2.8224 MHz - Sample rate used by the 1-bit sigma-delta modulation process of Direct Stream Digital.
