a sound effect based on the use of amplitude modulationIn fact, this is a replacement of some values ​​of the signal amplitudes with other values. Due to over-amplification, when the peaks of the input signal are cut, you can get, for example, the classic heavy metal guitar (that is, the signal is given a grinding or a kind of “hoarseness”). The application of this effect leads to a rather sharp distortion of the input signal (depending on the modulation depth), as a result of which the signal becomes similar to a rectangular one, and as a result, the spectrum of the signal expands. The classical mechanism for producing the effect is as follows: the input signal is mixed with its copy, subjected to conversion in the amplitude modulation unit, which has two signal levels: threshold and upper. If the amplitude of the signal entering the block does not exceed the threshold level, then the signal passes to the output of the block without changes. If the signal amplitude is above the threshold level, then the unit amplifies such a signal to the upper level.

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