New product launch?

[octaviars]

By the way, could someone explain me why Air should sound better than USB? Cause with (asynchronous) USB, the DEV get the data, and manage  with it's DAC, and that's all? Finally, doesn't matter how the data get into the devialet ?

Ps : hope it's not a kind of Godwin's law...

By using AIR the data from the network is buffered inside the Devialet and then processed by the internal DAC. No jitter can occur, since this process is completely independent of any external clocking. As long as the buffer does not run empty you can be sure that the data is processed bit-perfect. If the buffer underruns you hear dropouts.

With other digital sources like USB, AES/EBU, BNC the sender delivers the data with its own clock. Even small inaccuracies between the clock of the sender and the internal clock of the Devialet can induce, that the Devialet can not process all bits sent by the source. This is no longer bit-perfect (jitter) and the reason, why in professional studio equipment master clocks are used, which synchronize all devices in the digital chain. Unfortunately, the Devialet does not have an input for an external clock.
USB signals from a computer tend to have a bad clock precision. Precision can be improved e.g. by reclockers like the Mutec MC-3+.
Or you can use high quality streamers like the ones from Aurender, which already have a very precise output. But even if you have a source with a very precise clock, still the clock accuracy of the Devialet matters (unless you synchronize Devialet and sources with a master clock, which is not possible).

Since AIR bypasses these problems, it delivers the best sound quality you can achieve.

In the first version of AIR, where AIR was the actual player, this was correct. The playback chain was indeed controlled asynchronously by the amplifier. When Devialet introduced a virtual sound card for AIR, the clock in the amplifier could still control (I am not sure it did, however. Maybe AIR3 does this?) the "sound card" on the PC/MAC, but not the playback software (JRiver, A+, Tidal/Qobus desktop etc) so had to rely on the players ability to deliver data (which again depends on clock of the computer). I suspect that any sound quality improvements in AIR vs USB has more to do with the internal signal path where AIR is better positioned and also that the USB implementation in Expert amps may not be the best. S/PDIF is not asynchronous so the signal flow on AES/EBU, BNC (and RCA) is clocked by locking on to the embedded clock in the data stream.

The last thing in your replay I can vouch for, a Mutec MC3 between my microRendu and Devialet made a change to the better. A good re-clocker and the use of AES instead of USB is something that I can recomend to try if one dont want to use AIR.