Earthquaker Hummingbird V4 Tremolo PedalWelcome to your new Hummingbird Repeat Percussion tremolo! The 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 50s 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