While the topic has been discussed dozens of times, I don't believe that anyone has really come up with a definitive answer--one that would hold up in a court of law. And, from everything I've read so far, this varies from country to country. Ironicaly, just today I heard a song on a local jazz station that I am positive was created using a specific Yamaha style and more than likely a Tyros. The sound sounded great, but as to the legality issue, I'm just not sure, and I don't believe this has ever been tested in the courts.
Gary
_________________________
PSR-S950, TC Helicon Harmony-M, Digitech VR, Samson Q7, Sennheiser E855, Custom Console, and lots of other silly stuff!
K+E=W (Knowledge Plus Experience = Wisdom.)