I don't have time to be a sound engineer.
Slowly play many of the sounds accross the range of the emulated instrument.....you will fins many issues...like Sudden change in Timbre, drastic change in vibrato note to note (and all of a sudden when they change samples).

Just ry a bunch (Cornet, Sax, violins etc)

Maybe they are not as bad as I said..but it is a sore point with me...if I pay $3,500 for an instrument, in 2010 the sounds should not have those issues. For the type of music I play, it runs my performance.
So, I just do't use those voices (that's not so good)

I am waiting to see if they fixed all that in the PA3X...I sent Korg PA a 3 page document outlining most of the problems...let's see if they ignored it? If they did, they lost a customer.