Nyquist frequency because Audio frequency is 20,000hz 44,100 HzIn digital audio, 44,100 Hz (alternately represented as 44.1 kHz) is a common sampling frequency. Analog audio is often recorded by sampling it 44,100 times per second, and then these samples are used to reconstruct the audio signal when playing it back.https://en.wikipedia.org/wiki/44,100_Hz
