| Distortion | |
| Distortion is usually thought of as an undesirable change in the waveform as it passes through electronic equipment or any kind of transducer, although, like noise, this is a highly subjective and context dependent judgement. |
| Some sound synthesis techniques such as non-linear waveshaping use distortion to achieve their ends. | The familiar sound of the rock guitar is largely dependent on distortion techniques. | Any technique which changes the signal can be considered a form of distortion, so even a simple equalizer may be thought to distort the signal. |