Dear Clif;
I understand only very few things from this.

But the famous former Yamaha Dr.physicist Th.
Abgarjan told me some weeks ago,that the Variphrase technology is an "old one" and implemented in the PSR-Vocalizers and he also knew a trick to use it fot voices.I didnt understand,what he said.

So it seems to me that you are absolutely right.I sent him the whole content of what was written here.

Best regards