In the Video about about VE3 there is a screenshot of Play Back which is presumably using using several instances of VE3 each providing 16 stereo outputs.

I notice that each Track in Logic is behaving as one would expect in that the Track Meters are independent.

My Puzzlement is this:

If I create a Multi-Timbral Software Instrument and Insert a Vienna Ensemble Multi Out Plug-In, my slave creates a "Project" capable of holding 16 instruments each of which can access any one of 16 stereo outs.

But

HW Out 1-2 go to the first Instance of the Multi Timbral Software Instrument.
Now at the moment that a Multi Timbral Instrument is created the equivalent number of Auxilary Objects are also (or may be) created.
It is only within the inputs of those Auxilary objects that you see a reference to the Multi outs of VE3 (except HW output 1-2) and HW 3-4 through to HW 31-32 are correctly assigned to those Auxilary Objects.

As a consequence if you create the 16 tracks of a Multi Timbral Sofware Instrument with their different MIDI channels, the Track Automation for Audio Volume will only control the output of the first Multi Timbral Software Instrument component. Also all tracks of the Multi Timbral Software Instrument will show the Audio Activity of the VE3 instrument assigned to Midi channel 1 in their Track Meters.

So, quite simply, how do you have 16 Tracks of Midi Data feeding the VE3 source and then return their audio in such a way that those tracks can be controlled by track automation that is INDEPENDENT for each track.

The only way I can think of doing it is the same as I have for my 2 Mac Mini which host the plugins in Plogue and use MOL together with FW Audio interfaces.

I have a midi track for each Vienna Instrument on the Mac Minis and an Audio Track to receive the Audio back which can then be controlled by Track Automation.

Thus if I attach a midi Instrument to each component of the Multi Timbral Software Instrument I can see Independent Meter activity for MIDI data and If I set up tracks of the Auxilaries being fed from VE3 I have control over Track Automation.

But am I missing some settings or techniques since the Video tracks seem to be the components of the Software Instrument (if you look at the inspector) and have independent track meters.

I am running Logic 8.01 on a Mac Pro 8 core (January 2008) OS is 10.5.2. Slave for VE3 is a G5 running OS 10.4.11

I should have mentioned that a lot of my Mac Mini WW and Brass tracks use C11 to Control Velocity Xfade and of course that is built into the Midi data going from my DAW to the Mac Mini Slaves. 

Referring back to my orginal post I would state that I think the VE3 manual needs beefing up in this department ie for the Logic Setup. OK I now have some answers after the various replies but new users may be stumped easily.

Although I have used Logic for years it is the first time I have really used a MultiTimbral Software Instrument in that way.