LeesKeys
For ease of use,
Use the Natural Play
I would use the Aux in from either a headphone out of your desk or a Aux out (monitor mix)
Make a 3rd up patch (High)
Get your reverb etc dialled in how you like it
Store as preset 1
Duplicate this patch and edit the harmony to be High & Low (3rd above & 4th below)
Store as preset 2
Duplicate again and edit to be High & Higher (3rd up and 5th up)
Store as preset 3
Your harmonies will track via the backing tracks aux in
All you need to do is decide are you using
Patch 1 - 3rd Up (High) this will work over any song, this is the fool proof patch
Patch 2 - 3rd above and 4th below ( High & Low)
Or
Patch 3 - 3rd above and 5th above (High & Higher)
The units do a lot, I’m going to save you time and tell you not to bother outside of these patches
The fx are fun but gimmicky