Eclipse pitch shifting works fine. You need a few details to be properly set:
-right connection of XLR or 1/4" according to type of signal (balanced/unbalanced +4dB line level vs. unbalanced -10/20dB instrument level)
-monophonic audio source. It won't shift chords.
-low note should be set to the lowest note the unit should expect to process. For a guitar that would be an E2 or D2 for whammy work.