Analog Processing. The pedal is built with the best analog processing circuitry available. This gives a smooth, warm and fat sounding chorus/flange effect, useful both for live and studio performances. The Red Twister is built on the legacy of the EBS UniChorus Studio Edition bass effect, but with adjustments of delay times and frequency range to match the guitar perfectly. The pedal output can run in mono or stereo. Effect mix level. Under the hood of the Red Twister, there's a mix level control that let you decide how much or little of the effect you'd like to be blended with the original tone.USA and paypal only.