Select a patch (ROM-A1 Alead BC works nicely in this example)
To get to the Frequency Shifter screen press the edit button below 'DISTORTION' twice then scroll left once with the 'PARAMETERS' < button. Use the left soft knob and select Freq Shifter type to Vowel Filter, set Resonance to 100% with the right soft knob. Scroll right once with the 'PARAMETERS' > button and set Stereo Phase and Mix to their maximum with the left and right soft knobs. Scroll left one screen again, hold a note down while moving the middle soft knob to change the Frequency %age (vowel sound). You're good to go!
Another Mystic