Man sometimes this UR28 confuses me. youtube routing is not as simple as I wrote above …
Even though UR28M Out C (5,6) lines are the only thing connected to my new headphone amp, I can still hear youtube in the cans when I select ANY UR29M Outputs, including Output A or Output B (again: 1,2 and 3,4 are not physically connected to the headphone amp).
And - for Outputs A and B only - I can hear utube when selecting ANY of the three Mixes on the UR28Ms top front panel! It’s only when Output C is chosen that sending a signal to the headphone amp requires that Mix 1 on the UR28M front/top panel be selected.
Noted (but I don’t quite know how to use the information): In no circumstance does the floating UR28M control panel show any signal in Mix 2 or Mix 3 (virtual buttons on the far right, not to be confused with Mix 2 or Mix 3 on the top of the UR28M panel).
I know this has something to do with “DAW” carrying the Utube signal per the UR28M computer control panel … but I have no idea what else is happening under the hood. For the record, the DAW Out Device Port in Cubase is assigned to S/PDIF in the Cubase VST Connection window, though of course Cubase forgets that assignment every time I turn it on (and Cubase is not on when I’m listening to youtube like this).
Of course (?) the UR29M Output Level big knob, Mono Mix, and Mute, Mono Mix, and Dim buttons only affect the signal sent to the headphone amp when Output C is chosen (the output physically connected to the headphone amp).
Well, I can make it work the way I want by marrying Mix 1 to Output C and then punching the Mono Mix at the top of the UR29M box. At least so far my ignorance of the actual routing is not getting in the way. Still, it is irksome to know only the “how to do it”, but not the “why it works that way”!