Topping D10s DAC auto standby?

[Sehnsucht]

would it be possible to have a man-in-the-middle checking the audio signal, and if it is not playing for some time issue a power-off on the USB bus? Although at the moment nothing comes to mind, Linux surely allows some dirty things to be done...

Of course, you'd want whatever solution you come up with to use less power than just leaving the DAC on.... (They're not exactly power-hungry after all!)