Though called the 3 Series Chorus, this is actually both a chorus and a vibrato pedal. In its standard chorus mode, you get a doubled signal with a variable modulation rate (from slow to super-quick). By dialing up the Depth knob, you can travel from gentle to turbulent waters. For true vibrato, just flip the Vibe toggle on. (Find the rest of JHS' 3 Series for affordable, essential effects.)