Catalinbread CallistoRich chorus, thick vibrato passed down the bucket brigade. It's interface is simple, intuitive, and provides a multitude of sounds ranging from subtle and shimmer to rotary speaker like to off kilter warping and warble sounds. The Catalinbread Callisto is a Chorus Vibrato pedal, which employs an MN3007 Bucket Brigade chip at its core. Its interface is simple, intuitive, and provides a multitude of sounds ranging from subtle and shimmer to rotary