The Nyquist Sampling Theorem states that:
A bandlimited continuous-time signal can be sampled and perfectly reconstructed from its samples if the waveform is sampled over twice as fast as it's highest frequency component.
Nyquist limit: the highest frequency component that can be accurately represented:
Nyquist frequency: sampling rate required to accurately represent up to :
No information is lost if sampling above .
No information is gained by sampling much faster than .
Is Hz (CD-quality) enough?