Small nitpick: CD quality is in fact 44.1khz. The nyquist theorem essentially says you need to use a sampling rate twice as high as the highest frequencies you want to record and reproduce. The article gets the gist of this right, just the cd quality numbers wrong. Izotope has a really good article that goes into digital to analog conversion, sampling rates, and the history behind them.

https://www.izotope.com/en/learn/digital-audio-basics-sample...