Peter, can you tell us where to find the button
, i have never heard about this before.
After thinking about this "20 minute" heat up for a year, I decided to make a provision in the (XXHE) software that allows for silently playing music. USB is now active all thee time (though at a fairly low level) and the DAC is actively performing its D/A task continuously. And yes, even the amplifiers and everything is just On (IOW you won't hear a thing of this).
And then something happened I could not predict ...
With this feature, you actually play music 24/7 and the difference - at least in my situation - is crazy. The sound is so so much more clean (more crispy, more responsive). And of course right from the first tones of music for the day. 😉
I never knew that this could make such a difference, and obviously when you play music continuously for say 8 hours, you won't notice either because it will go gradually (better).