Leigh; understood. Thanks.
Then it has to be something in Dorico’s own mapping, as you say, hasn’t it?
After my experience with Sibelius, I decided - along with a friend and composer who is helping me (I’m starting late in life - but am very determined) - that it would be preferable to aim to have real instrumentalists play what I wrote… whenever I could be so lucky.
So I am deliberately staying away from trying to emulate actual orchestral, ensemble and chamber sounds. After all, the music is for real musicians.
But VSL comes closest to such an environment, and is indeed very rich.
So I’d like to try and get it working for that reason - particularly with those instruments with which Halion SE is ‘weak’ (upper strings). And where the articulations are completely lacking in Halion SE… brass mutes being the biggest example I’ve come across so far.
Daniel, I know we’re in the minority here, but is there any chance of fuller docs, please? I’d be happy to help/contribute in any way I can 
.
Thanks!