Bernie,

I found that on the S900, I can layer two SA trumpets (must be the same sound, and same octave), and it gives me a terrifically wicked mute trumpet...it might work on other brands.

The biggest mistake I hear when someone tries to emulate a wind instrument, is that they don't allow the virtual player to breathe.

That detail, and the unrealistic re-attacking of every note, are always a giveaway...Yamaha's Super Articulation takes care of the latter very well, but you really have to think about the former while you're playing...unless you have a wind player that is able to do "circular breathing".

Ian