Thanks for the helpful feedback although I may have to block you as I’m not sure I can afford to read many more of your posts😜
As an aside, I think I recall you picked up a 2-track, 15ips Master Tape copy of a Yello album at AXPONA last year. Did it live up to your expectations?
My testing with a new Mac Mini M4 is that Apple Mac Minis are still crap at working with others’ consumer AV gear over HDMI. I tried UHD Movies in True ATMOS with both an LG 4K OLED and a Samsung 8K LED and with an Arcam ATMOS AV-Preamp and with a Marantz ATMOS AVR. I have much better luck sending sound via USB-C to my Audient Oria. So, since you are talking about AppleTV and not something that actually supports True ATMOS, then maybe you could make it work. In the end, I decided only to use the Mac Mini M4 with BACCH and Dolby Reference Player on it for music, not video. I use an Nvidia Shield for video. Let me know if you figure out something else!
Sounds like there were a few snags with the BACCH SP AFIO in his system, so Shane is holding off on his final thoughts until he first tries the Baach Mac.
His final thoughts should be interesting as his reference DAC is a Playback designs.