In this demo the VH2 sounds pretty good to me.
This type of singing is perfect to showcase the VH2. It's not very expressive, it's compressed, and highly rhythmical. His voice, while very nice, is more a part of the drum section than a melody. (IMHO) My style is more fluid, and very spontaneous. I need to punch in and out of a harmony, sometimes 2 or three times in the same sentence. I try to sound like the 4 freshman, 4 tops, Mills bros, Beach Boys .... that lush, wall of sound with moving voices in the chord. A simple third above can me made to sound great for Everly Bros, and the like, and most other styles, but my signature has always been more of a Manhattan Transfer-ish approach to vocals.
The biggest problem is not with the tone of the vocals ... it's the erratic behavior when you try to sing with more expression.
Yamaha VH2 needs a solid, steady vocal with little or no variance in dynamics. The compressor, and noise gate help make it more usable, but it's been said many times ... even the Digitech units from 30 years ago performed better. The TC stuff blows it away. (Go ahead Fran ... tell us how much you love the G-70 processor)