Re-reading Cees first post He is not referring to a dischord but to an unwanted chord or single note, when holding down a right hand note when using technichord, and at the same time changing the left hand chord. This only seems to occur if you have a percussive right hand sound, eg piano, and it's abit of a nuisance. If using a non percussive sound eg strings, brass, you just get a smooth transition to the next chord from the "upper" manual when changing the left hand chord. Am I right Cees?

I think I've experienced this on all 3 technics keyboards I've had over the years, and in the GEM wx model. Can't positively re-call if Yamaha also did it (PSR8000) but I think it did.

Just have to get used to it...

Ogre