TBH, most arrangers don't offer the kinds of control I would want to use if VH was a part of my act (it isn't!). I would like easy footswitch control of whether the harmony part was above or below me (on the fly) and an easy way to go from one part to two and back (and off) without taking my hands off the keyboard.
Diki:
Point 1: It's difficult to kid the audience when you are stood in front with the VH in full veiw. I always make a joke about having my backing singers in a box because of the exorbitant cost of real ones.
Point 2: The Voicelive Touch has 5 favorites which you can set up any way you wish and select instantly on the fly, no different than selecting different voices, variations or performances on the keyboard. Apart from the favorites you can also switch up to four voices of harmony plus doubling in and out as you wish.
Point 3: In my book it's a lot easier with a touch screen than a foot switch at least you don't have to look down to make changes.
Perhaps it's time to try some more up to date equipment, they say that Dinosaur's became extinct because they did not change. LOL
Col