Control Rate: Rate sets the speed of modulation which ranges from slow, smooth filter sweeps to jittering vibrato Great Control: The Andy Summers Walking on the Moon is an analog flanger with a simple but powerful control set of rate, range, and color Perfect Tribute: Celebrating the classic, shimmering flanger sounds of Andy Summers, the EHX Walking on the Moon is a tribute to the tones Andy employed while carving his niche in the early days of playing with the Police