All good points...but you kind of missed my point here.

Go to your arranger. pick a flute, oboe, violin, sax, trumpet, english horn, etc...etc..solo orch. voices, play only that sound SLOWLEY up and down the keybed...(try different velocities for different passes...like you would on a slow ballad, be sure to HOLD that note for a while...listen to the vibrato and timbre carefully note - note. Not all voices will have problems (seems like the ones I really like seem do)

You will find that things go well ...then OOPS, what the hell is that...it's a different timbre and/or a faster or slower vibrato ( by a lot). That's the issue.
The other night I was playing stranger on the shore for my wife, using the PA's tenor sax exp 1..all of a sudden my wife says 'What was that sound? it sounded like a duck honking, compared to the other notes'

A little variance is fine it adds to the realism, but not when it is a significant change. Who do they have QC test these things....the janitor?

If you play fast country or rock...you will probably never care about this.

Oh by the way...the Motif and the Korg M3 have some of the same problems.
My Kurzweil has VERY little. But, they don't make arrangers.

So the only answer today is 1) get great samples and make your own complete new sound 2) use a PC with top quality VSTi sample player (and spend big $$).

It's just sloppyness...you take a beautiful sax on the PA2...very nice except one or two samples they used do not match the others in timbre or vibrato..ruins the performane. But other Sax's are OK.
Same thing I found on the T2. They sample the sounds with vibrato to make the programming easier (less work). But that is a mistake. Yes, some say it is a more realistic vibrato if it is sampled...but if the speed is screwed up ...who cares!
Sometimes it's just they copy a sound from a previous keyboard and the problem right along with it.

When I play the Ketron Audya in a couple weeks we will see how it rates in this area.

It will be interesting to see how they did.

For now...I just don't use some of the sounds with issues...and some of those I like in general!

Lee S.