Its not true of course....but it certainly is not onbsurd. In the Uk we have many many brands of soap powder for example that fill our stores shelves and naerly all of them come from just two soap powder manufacturers. By filling the shelves with numerous products all from the same company they fool the consumer into thinking that they have much greater choice than they actually have and any real competition has to compete with numerous different brands for a little bit of shelf space. Its quite clever really. But i am sure that yamaha korg and roland are diferent companies regardless as to how similar the Roland E80 looks to the Korg PA1X !