Hello, everyone. My apologies for unceremoniously resurrecting this thread once again.
It's been so long since I used my computer-based home setup that I've gone through an OS change (to Bodhi Linux) and bought a brand-new ODAC since I last fired up Gmusicbrowser. Unfortunately, despite configuring everything the way I've always done, I'm getting a lot of hiss through the Gmusicbrowser/ODAC/SX780 chain. I've isolated it to the USB audio side of the equation, since there's nowhere near that much noise in my CDP chain.
What could I have done wrong that's letting my ODAC act like the computer's hissy headphone out would?