Computer Music: Musc 216
Computer Music Terms

Aliasing

Aliasing is the term used to describe the unwanted frequencies which are produced when a sound is sampled at a rate which is less than twice the frequency of the highest frequency component in the sound. These unwanted frequencies are typically high frequency tweets and whistles.

[From EMU Ensoniq's Glossary of Electronic Music Terms]

Fig. 1 Sound with a frequency of 1500 Hz sampled at 1000 Hz.
Sample points are not enough to accurately represent the wave form.

What is the highest frequency that could be sampled with a sampling rate of 11.025 kHz?

Terms Index

Main Page