David is active on the Roon forum where you are guaranteed to be attacked by Vigilante Snake Oil Police (VSOP) as soon as you post anything suggesting that networks might influence sound. So he has taken his 3-tier Roon and Diretta project private, to avoid being harassed by self-proclaimed experts who think they know better than the rest of us and are compelled to set us straight. His overview is posted above in this thread.

He turned me on to Audiolinux in early 2024, and I implemented their Diretta function-and alerted him to the benefits- shortly thereafter. We use Roon Server running on that OS with Host (together with Roon as I have been doing on my Intel NUC) or with Host on a separate RPi (as he has implemented, believing that it further cleans the stream) and Target on a third machine.

Audiolinux has a menu system which makes it easy to install Roon or LMS or HQPlayer etc, so you don’t have to use Diretta with Roon. But I like it, and had wished for better SQ so here we are…

Server: Audiolinux Roon NUC w/HAF room correction and crosstalk cancellation
Theater: 218, Allo Signature, miniDSP, HD621, C61R, DSP5200SEu, 420, 33, NHT subs
EtherREGEN w/Finisar fiber, Shunyata Denali
Living Room: RPi4 Diretta Host & Target, Ghent USB > Singxer SU-6 > AES NA M-Links > DSP9
Shunyata TritonV3, LHY lps, Farad Super3, Stack AUVA feet