The Tyros 2 styles, I assume, will work as is on the S910 with no conversion process. If it all works the way I suspect as in past models, if there is a voice in the style or ots that is not present on the S910 the 910 will automatically choose the closest sound. Does anyone know this for certain?

Every T2 style I have works seamlessly. I haven't even opened a style where one voice is missing.

The S910 will also play T3 styles, but many have voices missing with substitutions. The keyboard makes these substitutions rather intelligently, often finding another Mega!Voice.

This is a nifty program to revoice a style http://www.jososoft.dk/yamaha/software/revsty/.

The Tyros 2, on the other hand, will not play a style that has been saved on a PSR-S910. You'll have to use a format converter (http://www.jososoft.dk/yamaha/software/sf2c/index.htm).

Beakybird