No, I am NOT calling the wife an idiot. But maybe not that tech-savvy. And I myself do not want to have to screw around excessively when I just want to listen to some damn music So here's the setup: MacMini computer with all my CDs ripped to it. USB connection to Emotiva XDA-2, and DAC outputs to "vintage audiophile" stereo system (VanAlstine, Dynaco, McIntosh). HDMI output of MacMini to Sony Android TV (just as a display when needed, not for sound). MacMini controlled via various methods: Finder sidebar screen-sharing from my Macbook AIr, iTunes remote app on her iPad. Current problem: Setting up the MacMini, I went to SystemPrefs->Sound and set the output to be the USB connection to the DAC. But once everything is powered-down, and trying to bring it back up (in idiot-proof fashion), the MacMini decides, since the DAC was off, that it should switch the sound output to the HDMI output to the TV. So I've got to open screen-sharing (on my laptop), then open SystemPrefs and change the sound output back. It shouldn't even be necessary to turn on screen-sharing at all, when running the MacMini in "headless" mode. She should be able to fire up the music from her iPad. Hardly idiot-proof. More PITA. Is the some way to instruct SystemPrefs to LEAVE the sound output on USB ? It looks like installing BitPerfect is a smart idea, and evidently it has its own Preferences settings, including audio output: https://www.psaudio.com/ps_how/how-to-build-a-music-server/ Could I hope that the audio output setting in BitPerfect is "sticky", that it doesn't adopt the Mac's annoying habit of thinking it knows what best ?