Hi, Daniel...
I am about to start up an orchestral project with EWHO. I'm doing Barber's First Essay for Orchestra.
I have created my own template for EWHO that switch articulations by changing the MIDI channel of the track output. So... when I insert a new articulation in the articulation lane it is actually changing the MIDI channel output of the track to the Play instance.
The KS patches in EWHO work by sending a note number and they work great but the library KS patches don't expose much of the library. So, I was completely thrilled to learn that Articulation Maps support channel switching. (Thanks to Nico in the FB group Virtual Orchestration. Also you should consider joining the Cakewalk/Sonar User Group).
The attached photo shows how to set up an articulation for a multi-patch instrument in EWHO. You create the instrument by loading all the patches you want to use into an instance of Play, then create an articulation entry for each articulation as shown. You need an entry for both Note and CC so your controllers are directed to the same MIDI channel as the note. So the 1-16 setting for "In" will take any input and output it on channel 2 (for the spiccato articulation shown).
It's a bit of work to enter these. Also, since the library is so complete it presents a lot of choices and you might have to edit your patch list and articulation maps for specific projects.
I hope this helps. I'll be around the studio today so post any questions.
Also... just in case you don't know it already, make sure you understand how the Mod Wheel works with this library because you might save yourself hours of frustration. ?