Hello,
You’ll need to go to the Preset Library tab in H90 Control to change preset A/B. This page of the manual explains all of the operations you should need https://cdn.eventideaudio.com/manuals/h90/1.7.5/content/h90-control/edit.html#preset-library
Also, check the Routing tab to make sure your presets are routed in Series: https://cdn.eventideaudio.com/manuals/h90/1.7.5/content/h90-control/edit.html#routing-inserts
MicroPitch should be a good choice for the sound you are looking for with a different amount of slight detuning and delay on both voices.
