Hi Al, the response you got on your ArrangerWorkstation thread posting sounds like the typical line Yamaha gives when presented with any problem: Deny the problem, and then say that Yamaha purposely designed it that way. Funny thing is that they're NEVER able to come up with a legitimate 'playing scenario' where having the left voice OTS selection continually defaulted to OFF makes any sense. I'm really wondering if Yamaha will ever admit to and correct this 'obvious' glitch on Tyros II, because if they haven't caught on since the PSR2000 (first kb with OTS) and the PSR300 (several years later), I kinda of have my doubts. I'm exhausted after finally getting them to fix the 'fill to self' issue, so Al, perhaps you could rally this cause. - Scott