![]() Recently, there has been a resurgence of interest in frequency shifters as effects. This means that frequency shifters were available (even though expensive) as far back as 1950. However, unlike the pitch shifter, it is feasible to implement a frequency shifter with all analog circuitry. Because of this, sounds processed by a frequency shifter start to sound very unnatural with only a small amount of shift. ![]() Unlike the pitch shifter, the frequency shifter does not preserve the harmonic relationships between the various tones and harmonics in the input signal. It does this using a complex amplitude modulation like technique. Frequency Shifter is a device which raises or lowers the frequency of an input signal.
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