Well, UD is probably right. The PSR-8000 was announced at the 1998 NAMM and was the first with built-in harmony that I had heard about. I visited the Roland website for alternatives to the PSR-8000 and checked on the E500 and the G1000, but neither were described as having a vocal harmonizer. Only the E600 was described as havaing vocal harmony. I do recall there was vocal harmony on some of the pianos.

Also, I do not know whether the Roland's version was IVL-technologies. Roland has some technology of its own. Maybe it is not as good as IVL or maybe the Roland device infringed the IVL patents.

In any event, I wholeheartedly agree that Roland is missing the boat by not having vocal harmony in the VA series. It is hard to imagine that there are many arranger players who do not sing. Now maybe not all like vocal harmonizers, but it sure is a useful option.

One minor point. I like having at least three audio inputs on a keyboard--one for a mic and stereo line inputs to mix an external source (as on the PSR-8000, PSR-9000, and 9000Pro). I think the Korg PA80 has stereo line inputs, but you lose one if you add the vocal harmony option--right? If so, that's too bad.