Is this what you mean:
And if I need to add another source like console, I would replace the splitter with a matrix and connect the console to the matrix with HDMI and to the AVR with SPDIF?
Plusses and minuses for this setup:
+ No need to switch audio signal at all (?).
+ Pretty simple overall.
+ HTPC/PC unit inside the TV cabinet (can't be seen and saves space).
- Can't use PC for photo/video editing at the same time while watching movies/TV or playing games (maybe I would be able to watch live TV if I used TV's own tuner? But live TV from projector or games and movies would be out of the question though).
- When I need to add USB device (external HD, USB stick, cards from camera etc) I have to walk 3-4 meters from the PC display to the TV cabinet where the HTPC/PC is and plug in the USB device there.
1. I suppose I would need powered HDMI splitter? Is there any effect in quality when using splitter or matrix? My TV, projector and PC display will all be 1080p (1920x1080). The PC display might have higher resolution. How do I change what display will have the picture? Can it be done so that if the display is on then it will receive the HDMI signal? Or do I have to use remote or something to switch between the HDMI output?
2. Connect one HDMI from splitter to AVR input and from AVR HDMI output to TV for DTS-MA support? Did I understand right? DTS-MA doesn't go through SPDIF? BTW my speaker setup will be 5.1.
3. Check the second "+" above. Am I right on that one? If I wanted to listen music insetad of TV or game sound I would have to just mute TV on XBMC/mute game in Steam?
4. Instead of seperate SPDIF and HDMI, would it be possible to just connect the HTPC/PC unit to the AVR with HDMI and then from AVR's HDMI output I would use short HDMI cable that would go to the HDMI splitter? Check this
picture. I could connect TV to AVR with analog audio cables and this way I could watch TV with its own tuner and even listen TV audio from the speakers while the video would go to the PC display via HDMI?
I will start thinking two additional setups now so I know what is the best way to go with the three:
1. This setup
2. Another "one unit" HTPC/PC setup but so that the unit is below the table where PC display is.
3. "Two unit" setup: Powerful PC is below the table and minimal HTPC is inside the TV cabinet.
In the third option the PC would be used for photo/video editing and also for Steam (as I wouldn't want to buy two powerful units. Also it would mean twice the noise and power consumption). The HTPC would be something like Zotac ZBOX Nano AD12
and would be used for movies/TV and music. Not sure if this would be to complicated though.