Mike,

If you want to achieve a very different piano sound and you want it to be better ( of course better is relative to what the player likes to hear ), you would do well to do as Achim suggests. In the end, you may be happy with what you can come up with, or you may not.

I modified and tweaked a few of the presets on the Motif ES, ac pianos being among several of my user voices. I can access raw samples in the machine, which you may or may not be able to do on a Tyros. I consider myself to be fairly adept at tweaking sounds, if only because I've done enough of it, but I am quite confident that I'm nowhere near the level of someone like a Tim Conrardy, who I ( and probably many others ) think is a world class synth programmer.

In the end though, the Motif samples are what they are, and I can only do so much with them. I can't get anywhere near the quality ( for my tastes of course ) of my Plugsound keyboards soft module.

In contrast, I can come up with some fairly cool alterations on the electric guitar voices, partially because the sounds are affected more by effects. By far, for me, the best comes from the editing I can do on an analog or analog modeled synth. Even the Motif's AN150 plug in gives me so much to work with, and it allows me to come up with sounds I couldn't have even thought up myself.

AJ