Room correction

[ogs]

But I think the problem here is you have to keep the amp in line-in input source to be able to capture the signal to the USB out. That's why I can't send the signal back to USB or AIR and listen to the processed signal.

That is where the loop idea comes in. One would lock one digital input as 'return' and enable one output as digital out. The digital out can be enabled today and transmits whichever input you listen to. The source selector would work as normal.

So with the loop enabled you'd get no sound unless a digital signal arrive at the 'return'. If this is two SPDIF connectors, an SPDIF cable plugged from out to return would produce sound.
This would be possible on today's Expert amplifiers. Whether Devialet would do something like that is an entirely different matter of course.