tdgeek: So, is an ultra small PC an option? The Intel NUC doesn't have an audio port s no good there. There are small form factor PC kits I have seen at times, or a Mac Mini? From the comments in the thread, a PC seems the way to go, and you may be able to find one that is small, low power that may meet the end need. A cost though compared to a low cost media player or a rPI
Don't need an audio port. I only have HDMI audio running from my PC (and from the rPi when I used it)...
I looked at the Intel NUC and it's nice but pricey... The server I have spare is sitting in a rack in another room so is effectively silent :-)... I ran a 10M HDMI cable through the ceiling down to the amp and it works great.