I must admit that I rarely use "break" button, mainly because I try to avoid pressing button while playing (unless really necessary). I guess I need to investigate more into this to see, if there are additional benefits
I would only like to summarize proper voice transitions (to avoid SSS issue)...
From what I said in my previous post, it's obvious that as long only single voice is used in each variation, we can always have seamless transition when we change variation (OTS actually). It's obvious that we can also use different voice in each variation, without loosing seamless transition.
If we use one voice in one variation and in next variation two voices are needed (or vice versa), then seamless transition is still possible (because we have three voices on disposal: R1,R2 and R3). In this case however, we can't use any new voice in following variations, without loosing seamless transition.
But that is true only if we change voices by using OTS LINK feature -because in this case voice is automatically
replaced at the beginning of the variation. If we
replace (but not activate) voices manually (by pressing OTS button) in the middle of variation, then we can still have seamless transition. The only downside is, that we lost one OTS button setting (because it's used only for replacing voice that's not currently in use).
But we have 10 registration buttons, so seamless transition shouldn't be a problem as long we are switching between 2-1-2 different voices.
Obviously, if we use two voices, we can't switch seamlessly to another two voices (additional R4 would be needed for that).
In short: seamless transition is only possible if the voice that we wish to replace is currently not in use (not in transition).
So... does Yamaha have SSS issue? I would say yes and no:
No, because in 95% cases SSS problem can be solved by planning carefully.
Yes, because OS should take care of that -but I guess, that is only possible if each voice channel (R1-R3) would have additional temporary (hidden) channel that would serve this purpose.
Bogdan