tags: music mus-407 signal-processing sampling

Nyquist Frequency

The [sampling] theorem's primary consequence of digital audio:

• the highest [frequency] that can be represented in a digital system is equal to half the [sample rate]
• this frequency is called the Nyquist Frequency:

$N = \frac{SR}{2}$

If a frequency $> N$ is sampled, the frequency of its digital representation will appear between 0 and $N$ Hz. This phenomenon is called [aliasing] or foldover.