Thank you for clearing things up, that seems a viable path then, I will keep on checking here. The only thing missing here for me is bluetooth in ( dongle?), a couple of digital ins for my TV / Box or another source , and FIR filtering perhaps, wich I don't know of an easy off-the-shelf way to implement with a Pi, as from what I gather, Camilla gets you IIR crossovers and PEQs but not FIR, right..? I have a MiniDsP DRC DI and a RME ADi 2 and have used PEQ to get some improvements but its not enough, I have a troublesome setup I can't ameliorate more with treatments or positioning. I also have dabbled with Rephase, but not really made the grade...I have an asymetric, rather reflective, big and leaky setup/room, and I am probably not knowdgeable or have invested enough time and resources ( studying enough acoustics and drc, getting a non USB mic and DAC/ preamp .. ) to get there ( just Umik 1 on REW, some notions on acoustics an psychoacoustics, minimum phase and excess phase behaviour, Swissbear tutorials and such..) Probably I should just bite the bullet and get Acourate DRC and what the real pros can get you, wich would allow me to keep the Pi on 2 channel with an USB converter out ( have one)... Or forget about not wanting a regular pc to interact with to listen to music and films on the stereo ( wich I really don't want to , its got to be transparent to the rest of the family) and use one of Mitcho' s DRC software selection (minus DRC, of course, that's for you guys..) for filter generation and convolution on JRiver (have an old laptop running windows XP with JRiver I paid 50 bucks ,v.15 I think, collecting dust..).
Anyway, I wanna ditch CDs for good: I have had 3 transport failures in 25 years ( 1 Sony XA50 ES trashed after 8 years, bought new, 2 Philips transports inside an MFidelity) and now my cheap Samsung DVD crapped out on me, and my MF is picky about cds, again...Done..