It's possible Jim. However, I've never found a default, onboard piano voice, regardless of the keyboard brand, that had the depth and quality I wanted. That's why I spent several days creating a special, mono piano voice using my old PSR-3000. That voice is being used all over the world now, and not just by PSR users, but a lot of Tyros guys are using it as well. Unfortunately, it will only work with Yamaha arranger keyboards. Now, it is a MONO voice, therefore, the problems associated with non-stereo systems, such as the Bose L1 series, are no longer a problem. Some guys tell me it sounds more like a Steinway than a Yamaha grand piano. I think it's kinda a mix of the two.

Cheers,

Gary