Well, Dave, they are explained quite well on many sites, so I don't want to just cut and paste...look it up.

I've edited my other post, as I thought I was a bit abrupt...sorry.

I'm not aware of any company that used them in the accompaniment...mega voices, that is, and I'm also not aware of a company that had velocity switched samples that responded quite like SA...again, it is not just velocity, but also phrasing that is taken into account with the Yamaha voices.

You must try a Tyros3 Sax sound, and play around with it...same goes for the SA Concert Guitar...it is an eye (and ear) opening experience...wonderful control just by technique....even for an average player, it works very well, with a bit of practice.

Ian