The Master Mix section has controls for adjusting the relative levels of the source signal and the reverb effect, and also the width of the reverb effect in the stereo field.Adjusts the mix between the dry, unprocessed signal and the reverb effect.Controls the width of the reverb in the stereo field. A setting of 0% produces a mono reverb. A setting of 100% produces maximum spread in the stereo field.Toggles the Wet/Dry control between 100% wet and the current setting.