<Li> chorus - a delayed signal is added to the original signal with a constant delay . The delay has to be short in order not to be perceived as echo, but above 5 ms to be audible . If the delay is too short, it will destructively interfere with the un-delayed signal and create a flanging effect . Often, the delayed signals will be slightly pitch shifted to more realistically convey the effect of multiple voices . </Li> <Li> equalization - different frequency bands are attenuated or boosted to produce desired spectral characteristics . Moderate use of equalization (often abbreviated as "EQ") can be used to "fine - tune" the tone quality of a recording; extreme use of equalization, such as heavily cutting a certain frequency can create more unusual effects . </Li> <Li> filtering - Equalization is a form of filtering . In the general sense, frequency ranges can be emphasized or attenuated using low - pass, high - pass, band - pass or band - stop filters . Band - pass filtering of voice can simulate the effect of a telephone because telephones use band - pass filters . </Li> <Li> overdrive effects such as the use of a fuzz box can be used to produce distorted sounds, such as for imitating robotic voices or to simulate distorted radiotelephone traffic (e.g., the radio chatter between starfighter pilots in the science fiction film Star Wars). The most basic overdrive effect involves clipping the signal when its absolute value exceeds a certain threshold . </Li>

Where did the punch sound effect come from