The Chorus section has controls for adjusting the depth and rate of chorusing applied to the reverb tail. Chorusing thickens and animates sounds and produces a more ethereal reverb character. It is often used for creative effects rather than to simulate a realistic acoustic environment.
Depth controls the amplitude of the sine wave generated by the LFO (low frequency oscillator) and the intensity of the chorusing. The higher the setting, the more intense the modulation. The range of this control is from 0% to 100%.
Rate controls the frequency of the LFO. The higher the setting, the more rapid the chorusing. The range of this control is from 0.1 Hz to 30.0 Hz.
Setting the Rate above 20 Hz can cause frequency modulation to occur. This will add side-band harmonics and change the reverb’s tone color, producing interesting effects. Typical settings are between 0.2 Hz and 1.0 Hz.