DOS Upgrade => ++Sound Quality

[howcho]

In my testing (see here: https://devialetchat.com/Thread-Phantoms...#pid100012) on my K28 Phantom Golds with DOS 2.12.3 Audirvana/UPnP behaved identically to Roon/RAAT with both 24/192 and 24/96 material.  Now we can see the full signal path in Roon 1.8 we can see that the Phantom is indeed downsampling internally to 24/48.

You can see the path with RAAT and not Ethernet UPnP, so yes, RAAT signal is downsampled but your UPnP speculation is as good as mine, there is no way to know yet if the Phantoms are downsampling it.

No, I think my UPnP speculation is better than yours!  Haha. But seriously, all the evidence we have suggests that the Phantom is downsampling everything (with the possible exception of Optical Direct) to 24/48 prior to DAC.  I can’t prove it of course - until I get my UMIK-2.  Will report back when I do.


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From Devialet;

”In the DOS 2.12.3 release, Devialet has upgraded the audio pipeline from 16 to 24 bits, which provides the pipeline sound quality superior to all previously published DOS versions. We chose to limit the input sampling rate to 96 kHz to ensure stability and performance. Indeed, in some situations (depending on network conditions and the number of speakers), there may be stability issues with 176.4/192 kHz. Even though we do not limit the input file sampling rate on UPnP for compatibility purposes, we do recommend that our users limit playback to 96 kHz / 24 bits, if it is supported by their UPnP server. In any case, our operating system processes Roon and UPnP inputs in exactly the same way and may resample the original stream at the end of the signal path to ensure maximum stability.”