TOPIC:

In my setup the minidsp ddrc 2x4 comes after my preamp and IT is only used for signal under 250hz. My preamp has to live outputs one is for the midrange and the other is for the minidsp. 
when I tried to connect for messurment with 3 usb cables . 
1. Umik 1
2. To my dac
3. Minidsp for runnig dirac live.

I couldnt make the signal go to my dac IT whent straight to the minidsp. 
is this the way minidsp and dirac is connfigured? 
ore is this because I used a usb hub? And my pc dident see the right output?

That's how it should work. If you want it passing through your DAC you'll need to put the minidsp in front of it. 

IT is unfortionate that it Cannot be done as with rew. I wanted to use it for my sub 200hz range. Triamping my setup. Analog crossover over 200hz digital under.  Using the 4 outputs . 2 for the 10" in my Main speaker the other 2 for my subwoofer. 
I guess I only have to use rew.

Well why can't it still? While you run Dirac have the amps that the ddrc is plugged into feed the full frequency range. Put the jumpers back on your speakers. Run Dirac then limit to 250 hz and put your set up back to how you want it.