Audio distortion occurs when the original sound signal is altered, resulting in a change in its quality. This can happen due to various factors, such as overloading an audio system, using low-quality equipment, or applying effects in music production. Distortion can make sounds appear harsh or fuzzy, which may be desirable in some music genres, like rock or metal. There are different types of audio distortion, including harmonic distortion and intermodulation distortion. Harmonic distortion adds extra frequencies that are multiples of the original sound, while intermodulation distortion creates new frequencies that are combinations of the original ones. Both types can affect the clarity and fidelity of audio playback.