Alesis QS8.1, QS7.1 manual Mono Chorus

Part 6: Editing Effects

MONO CHORUS

The Chorus effect is achieved by taking part of the signal and slightly delaying it, then slightly detuning it as well. This detuning is variable, not steady, because it is being modulated by an LFO (Low Frequency Oscillator). There are many possible adjustments in this algorithm. Some of the more interesting and useful ones include varying the LFO depth, varying the LFO speed, feeding a portion of the detuned signal back into its own input (thus increasing the effect), and changing the LFO waveform from a smooth triangle wave to a more abrupt square wave (causing the detuning to become more pronounced).

STEREO CHORUS

In a Stereo Chorus, the signal is split into three parts: a dry signal and separate left and right detunings. Whenever the left channel is detuned sharp, the right channel is automatically detuned flat, and vice versa. This causes the effect to become more pronounced and dramatic while keeping it “in tune” to the ear.

88 QS7.1/QS8.1 Reference Manual