I was trying to learn some basic knowledge about audio and I watched a comprehensible video.
Sampling, Aliasing & Nyquist Theorem video (https://youtu.be/yWqrx08UeUs?t=387).
But I still have a question after that.
The video says when sample rate is not good/high enough, the original sound wave will get aliased, resulting in a lower freqency. Then here the Nyquist Theorem comes into play.
For example, I use 44.1kHz sample rate in order to record a maximum frequency of 22kHz. But what if there are sounds/waves that are higher than 22kHz? (Do we always have ultra sonic surrounded? I don't …