MQA and Devialet

[Jean-Marie]

So it is only a matter of the DAC/filter design to avoid time smear (pre and post ringing) and any file format would good enough?

Yes. This is primarily a matter of filtering. 

This being said, time smearing seems to be the next buzz word, but I'm still to find anyone able to explain what it is to me in terms that hold water in regard to signal and signal processing theory, but it is never too late to be educated, so maybe I'll understand what it is one day........

Jean-Marie