Harmony GXT can be had if you call, for $239.It has 10 presets.With the included software & USB cable these can be saved and a different set made. My first test of the unit was just preset #2 which had the following settings:
1. 2 above
2. voice correction off
3. Hall Reverb
4. Tone on---kind of smooths out your voice
5. double on
I left it like this all night. Just hit the button when I wanted harmonies.With open voiced chords coming from RT the harmonies stayed real close voiced which I like.
I agree Pat. If you want to recreate the exact harmonies to a particular song you must have a unit that will play based on the midi notes you program in. Digitech calls this Vocoder Mode.Don't remember what TC calls it.