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chorusing

Like the echo or reverb effect, chorus is a specific way of influencing the sound during audio processing. Chorus is used to create a fuller sound by multiplying existing voices or instruments.

Like most audio effects that rely on delaying and phase-shiftingfrequencies and then mixing them into the original signal, Chorus works by delaying signals. Thus, chorus can be created by a combination of the chorus circuit's input signal and delayed copies of the input signals. The pitches and their deviations are mixed by a variable delay of the signal copies. The pitch deviation is extremely slow and controlled by a Low Frequency Oscillator (LFO).

Creating the Chorus Effect

Creating the Chorus Effect

The delay times used in Chorus are only in the range of 10 ms to 30 ms, however. This means that the phase of certain frequencies is altered in such a way that they are partially or completely cancelled out when mixed with the original signal, or their amplitude is increased, depending on how high the mixed amplitude is. To prevent the effect from repeating statically at the same frequencies, the delay time is modulated by a low-frequency oscillator (LFO).

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Englisch: chorusing
Updated at: 04.09.2008
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