There is a control option for the wheel. The default setting is what you describe. When the screen is on the volume wheel scrolls settings.Haha! Interesting: I know where to find that switch in the Sony 1Z and 1A - is there such a switch for USB DAC to be self powered? I can’t say I actually found it.
Another question I have is this before going into the play interface, how does one change the volume of the output. I scrolled the wheel but that only brought me around the landing page and the options there. Rather than the volume itself.
To change;
Go into System Settings,
next Advanced,
next Touch screen and Keys,
next Menu control key settings,
next Change from Knob to Media control key.
You will know always control volume with knob, (more commonly called Wheel).
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