Is this the Special Series trombones? What i did was make a user patch that combines open & muted, switched by A0/A#0. I found that easier than dealing with channel-switching.
I’m not sure there is a “right way” necessarily - behind the scenes in EWQL the keyswitch patches load the same samples for playback as if you loaded them yourself on other channels. I know you said VSL,… but they have some similar problems to solve.
So… I find the key-switch version more convenient but heavy if I’m not using all of its articulations. I like the separate channels if I want lighter or to process say the mutes with EQ a little differently, by sending them out to a different channel in the Dorico mixer.
Regardless -
Do you mean that the Muted + Staccato don’t show up in the PT lane in Play? That might be an issue to solve with maybe with an exclusion, or to be sure the PT is mapped correctly to a Playback Playing Technique PPT…
Or do you mean that the PT does show up but is not playing back like you wanted?
I did a VSL expression map this way.
You’ve got to have articulations laid out the same on each midi channel.
You can use relative channel switching (0 for VSL trombone and 1 for mutes).
Maybe you can attach your expression map?
looking at the VSL thread, it looks like you are needing to use two separate instruments as the SE brass mutes are not incorporated into the same instrument as unmuted. First of all, if by “old SE”, you mean the VI version then you need to remember that the map VSL supplied is not designed to work with the VI version which would require a different mapping. If you don’t already have the extended brass version in the Synchronized format, I’d strongly advise getting it --the crossgrade won’t cost much. Additionally, the muted and not muted brass articulations are identical (as far as I can see anyway) .
If you do use the synchronized versions for both then it’s very easy --simply add a mute instrument to your brass player in Setup and then use the Galley View to switch between the instruments. There is no need to bother with any extra Expression Map entries as they are the same for the non-mutes.
Using relative channels can also do the job but, having tried out both, I’d definitely recommand the extra instrument approach.