Any tips on getting more realistic vibrato?

The default vibrato is fine, but there are times where it sounds robotic, or just not realistic at all. I like the vibrato that comes from Instant Mode, but I have no idea how to control it. Any suggestions?

Have you tried the “Auto Pitch Tuning” and “Auto Pitch Tuning (Customized Style)” options from the “Auto-Process” menu? (They only work when Instant Mode is disabled)

Use “Rerun with New Random Seed” from the same menu to generate a new variation.