Thanks Jimmy. I'm at my wits end with this thing...it's giving me a headache. Unhappy MBOX user here. I'm not using protools, I'm attempting to use it with REW in order to measure some gear (frequency sweep)....out of MBOX into Neve preamp...out of neve preamp back into MBOX....REW sends a sweep signal out of MBOX into Neve and back again....in order to measure the Neve freq response. I'm not sure why you refer to the Analog 1/2 as my analog outputs. I think of these as my inputs (they're called hardware inputs on the panel)...software return's...i have no idea what that even means. Software returns?...from where?
From the hardware inputs into my DAW of choice?
It's funny how many other guys with different interfaces seem to have no problem with feedback with this type of loopback connection. It's the same thing as if I wanted to measure the freq response of the MBOX itself...I can't because there's all this feedback getting into and ruining the test signal from REW.
Here is what a sweep looks like in REW, through an interface (not mine), with zero feedback:
http://groupdiy.com/index.php?topic=54748.240
Here is what mine looks like:
http://s700.photobucket.com/user/des...creen.jpg.html