My memory notes from using it:

Make sure the MIDI is in the correct range. MIDI notes an octave high or low can really mess with it.

Use the Male/Female slider to help the voice fit te range and intended sound.

This assumes you are using a MIDI track to create the harmony (not just the chords).
If you are using the chords, it was always hit/miss for me, which is why I started using MIDI tracks instead, for each harmony.


Make your sound your own!
.. I do not work here, but the benefits are still awesome