I do not think 2 MCU devices can work independently under Mackie Control plug-in... only as MCU+XT.

Actually, after several hours, a plethora of bad words, and several reboots....i was able to get them to both work concurrently. The sad thing howeve, is that they are prone to crashes. I am not sure exactly what initiates the crashes. One definate cause is access to plugin edits.
For those interested in getting two mcu to work, i would gladly share the procdure i followed successfully.

lgmab
Actually, after several hours, a plethora of bad words, and several reboots....i was able to get them to both work concurrently. The sad thing howeve, is that they are prone to crashes. I am not sure exactly what initiates the crashes. One definate cause is access to plugin edits.
For those interested in getting two mcu to work, i would gladly share the procdure i followed successfully.

Crashes I have seen even with one single instance, not often but still.
 
Till you modify the source code, there are really working "concurrently". That is implemented to support XT/C4. I do not think that 2 "major" units was ever tested and that can cause problems.
 
If you want, I can compile yet another "Mackie Control 2" which can be used really independently (even with own XTs).

Hello, i use one mcu and a c4 regularily. I also have a second mcu which i wish to use as an extender for faders only. The crashes seem to occur when using the mcu (even when used as a single mcu) to edit plugins or other parameters, other than simple vol and pan.
Do you know of a fix for this issue? I guess what i really want is for the mcu to be stable accross the entire edit range within sonar.
Thank you kindly for your response!

So you in fact want them to cooperate... What happens if you use in/out from the second MCU with "Mackie XT" plug-in? There is one place where XT different from MCU from software perspective, its "ID" (MCU has 0x14, XT has 0x15). I am not sure either that is important, if things are not working as expected, I can make a mod where XT also has 0x14.
 
About crashes... I guess that is coming from within Sonar. MCU is not working throw ACT Dyn. mapping with VST plug-ins,  as all other surfaces do. And there are some problems in parameter names (MCU tries to display them). It is just a guess, unconfirmed and not reported so far (while at least you and I have seen that effect). So no fix at the moment. I do not have MCU and I am not using an emulator (TouchDAW) for plug-in control. If you can collect some statistic when that happens, for example with which plug-ins that happens more often, may be I or Cakewalk can find the bug (in plug-in/in sonar/in both).

eric_peterson
I have been able to make the Presonus work for us. At age 50 and with a wife and four kids there's now way I can practice enough remember the chords/lyrics for almost 100 songs, not and hold down the day job too. So, I use a two page open facing PDF binder on my VAIO and flip pages with foot pedals. IOW, the VAIO is already there anyway on stand I built which includes the router and my guitar DSP which is all pre-wired. Given that, it's no big deal to just run the single cable bundle over to the mixer, the bundle includes: 16 foot firewire, guitar DSP output, and my vocals. I'm an Aerospace Hardware/Software/Systems guy and tend to get carried away, a prime example is our band's wiring harnesses: everything is shrink wrapped, has braided cable sleeving, and every connection is labelled. A bit over the top, but super helpful when setting up. 

Would have expected our band set up to use something like this:
http://www.connector-techals.com.au/images/MIL-C-38999-2.gif
 
LOL
 

How do you control prochannel modules with TouchDAW?
 
When i press "plugin", i just get parameters for the first module (which is great) but i can't get past that first plugin, or module, rather.

patm300e
 
Would have expected our band set up to use something like this:
http://www.connector-techals.com.au/images/MIL-C-38999-2.gif
LOL

 
I considered something like that because it would be very slick, but opted out after I imagined a pin failure scenario during a gig. I've seen MIL standard plugs fail WAY too many times in the lab. I'd much rather have the ability to quickly solve a problem with standard cables. During a gig is not the best time to have to break out the magnifying glass, soldering iron, wiring diagrams, and to start mumbling "Great Scott!" like Doc Brown. You know, while the rest of the band wants to play ...