Hello, I have a HELIX LT. I use the PITCH WHAM or SUMPLE PITHCto change the tunning down or up (depends on which guitar I use) But it sounds bad. While the pitch change is good it does have a wavering sound like a tremolo. with distortion playing loudly it is little noticeable but in clean tones it is very annoying.
Im using 2.83.0 version and my setting is:
Interval -2
position 100
cents 0
delay 0
shift level 100
mix 100