EARTHQUAKER DEVICES HUMMINGBIRD V4 tremoloThe Hummingbird is a choppy, sawtooth tremolo modeled on the vintage repeat percussion" unit and similar to those found in old Valco and Vox amplifiers. It is capable of producing everything from classic "50's style" shimmering tremolo to a synthy, delay like chop that turns your signal into a burst of short pings and on through to near ring modulation speeds. Simply choosing between modes 1 (slow), 2 (mid tempo) or 3 (fast) and adjusting the rate and