For the few Roland Octa-Capture users out there, can you please do a test for me? Feed an external pink noise generator into one of the inputs, route it internally to an output using one of the mix buses, and do a linear impulse response of the line output on the interface vs generator source and tell me what the polarity of the test signal is. If you have a studio 6 digital iAudiointerface, you can do the same polarity test of line output vs line input as well. Let me know what your operating system is as well. Before pointing any fingers, I want to make sure others are experiencing the same issue as I am, and it ain't pretty!