Aliasing audio example

1. What is aliasing audio?
2. What is an example of aliasing?
3. What does aliasing sound like in audio?
4. How do you hear aliasing?

What is aliasing audio?

Audio Aliasing is an effect which occurs when converting an analogue signal into a digital one with an insufficient sampling frequency.

What is an example of aliasing?

The "wagon wheel effect" is a familiar example of aliasing. In this optical illusion, spokes on a wheel appear to rotate at different rates or even backwards depending on the digital frame rate of the video.

What does aliasing sound like in audio?

What does aliasing sound like? There are two forms of aliasing that can take place: either there will be silence, or the signal will be recorded as if it were a lower octave, completely misrepresenting the original signal.

How do you hear aliasing?

A super obvious way to hear aliasing is to sweep a sine up and down. It's much easier to hear than with a static signal. Oversampling at 4x sounds smoother.