Tone - Controls the tone of the reverb. CCW for darker reverb trail, CW for brighter reverb trail; Level - Controls the output level of the reverb.; Decay - Controls the length of the reverb trail. CCW for less decay, CW for more decay.; Modulation - Controls the amount of modulation in the reverb trail.; Mode Switch - This switch toggles between reverb modes: Nocturne, Spring, Plate