Strymon Ola dBucket Chorus and Vibrato - UsedStrymons Ola uses a dBucket algorithm that bring lush, warm and complex analog style chorus and vibrato effects to your tone. It has three different modulation types, (Chorus, Multi, Vibrato) which offers a wide variety of tonal possibilities. In addition, the available envelope and ramp modes add an expressive element that will expand your sonic capabilities. This pedal is in good condition with scratches and small dents along its casing.