There are quite a few people here with TCHelicon vocal processors of one kind or another. You should be able to get all the help you need. Prepare to be frustrated at first, and thrilled in due time.

There are 3 basic harmony modes:

SCALIC (my personal favorite, because it is very easy, and it provides a very active harmony. Basically, you set the scale of your song, and the processor forces your harmony and/or pitch correction notes into that scale.

advantages:
1) doesn't require MIDI (but can still be controlled that way if you want)
2) easy
3) generally sounds good

disadvantages
1) some songs are in more than one key, and if you aren't using midi to change keys at the right place, the whole harmony can go south very quickly
2) It's not always easy to determine the key/mode of the song. It's frustrating to get a song sounding "right" except for one note that drives you nuts.


CHORDAL (my next favorite)
1) Chordal mode DOES require midi chord input
2) IMHO, the harmonies aren't quite as active
3) if the key changes it doesn't matter since your harmonies are following the chords, not the key.
4) BIAB and RB make this mode work VERY easily!


NOTES (my least favorite)
1) follows midi notes, and requires a lot of work to get the notes programmed
2) to my ear it sounds more contrived than the other harmonies
3) but for very specific harmonies like Beach Boys it is the only way to nail the notes exactly

one tip when using notes mode: go into piano roll and stretch the note duration until the next note starts. That way as long as you sing there will be harmony (it won't drop out because the note duration was shorter than your singing)


You'll want a mic with some built-in gating or an external noise gate or volume pedal to keep external sounds from affecting the pitch correcting and harmonies.

https://www.dropbox.com/sh/ey71h8ep047758h/AAC12jNM0Hz9Q8zsh5iDeqNHa?dl=0