Sampling and quantisation

Is digital better than analogue? Here we discover that there are limitations when storing waveforms digitally. We learn that the consequence of sampling at a fixed rate is an upper limit on the frequencies that can be represented, called the Nyquist frequency.

In addition to the limitations of sampling, storing each sample of the waveform as a binary number means that there is also limited precision in the way we represent amplitude.

To find out what would happen if we tried to sample a signal that contains energy above the Nyquist frequency, see aliasing