detune in Helix Posted April 25, 2018 It is not the best but it can be done. Use the Simple Pitch FX. Put it as the very first thing in your FX chain. Interval +1 and mix on 100%. Leave everything else at 0.0. The Whammy DT pedal is the only polyphonic pedal I know that goes up (most just go down in pitch) but you may want to check out Electro Harmonix pedals. Line 6 seemed to hint that they were working on polyphonic pitch shifting but I would not hold my breath. It couple be a very long time before it becomes a reality.