thats the one i use
it differs from the TCHarmonics models i had used in the past when i had
a "Big Band" rack MIDI setup for gigging, in that
it is using your voice only to track the pitch, not sample and
extrapolate the harmony notes from your voice
the Roland was a big step forward as the formants (voices) are
pre-installed and so the harmony voices are distinctly different
from each other in the chord and sound truly natural
a later version, the 770, and one tabletop, the VP7 were also
available for awhile. I do not know if there is anything current
in the series still being produced
my setup uses twin Vocal mics on an angle so i can simply
slide my voice across from "solo" to "processed" for a more
natural (for me) live performance feel
the harmonies are truly instantaneous.. no lag whatsoever..
i always trigger from my right hand chords..
so my Roland demo "kit" was a VK8m Drawbar unit, the VP-550, small Roland digital
audio mixer, CME wireless, and ONE RING TO RULE THEM ALL
(oops) i mean a white FR3 to control them all..
(as well as the red or black FR7 they sent around with me to promote)
There were no "internal" drawbars back then
yet enabled on the original V-accordion models, so i basically
turned the FR3 into a Cordovox plus crazy good Vocals giggable setup