ES P offers integrated stereo chorus and overdrive effects. These are based on similar effects processors found in the synthesizers of the 1980s that ES P emulates.
Chorus knob: Set the intensity (depth) of the integrated chorus effect.
Overdrive knob: Set the overdrive/distortion level of the synthesizer output.
Important: To avoid hurting your ears or damaging your speakers, consider turning down the Volume level before setting Overdrive to a high value; then turn it up gradually.