Roon supports Devialet AIR

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I don't have any more information but had come to the same conclusion about how this works: Roon has effectively built in its own replacement for the AIR driver/virtual sound card and the control mechanisms used by the iPhone app, based on the AIR network protocol.  I doubt the Devialet actually knows or cares whether it's talking to Roon or the AIR driver.  So I'd concluded that there were unlikely to be any sound quality differences, since both would deliver a bit-perfect stream to the same interface on the Devialet.  That's not to discourage anyone from listening for (and hearing) a difference, of course  For me the main benefit is the integration of power on/off, source selection and volume control into one place, and the hoped-for improvement in reliability compared to the AIR virtual sound card mechanism.