Definitely go for the MicroPitch algorithm in the PitchFactor category of effects on H9 Max. The first preset, “H3000 MicroPitch” literally has those same settings. The Mix is set 100% wet, so you may need to adjust that for taste. As long as Pitch Mix is set to the middle, you’ll get the most spread. Tweak the pitches in opposite directions for more drastic detuning. Also for vocals, Tone may need to come up a little. I’d probably start in the middle and make it brighter, if anything.