FWIW, for playing back multi-channel movies, an AppleTV4K connected to your audio processor via HDMI will facilitate 7.1 playback. It will also access stored content on your computer via Ethernet.

Even so, I would still buy a Meridian 210 for playing hi-res music from your computer.

Not an Actor, nor married to Jamie-Lee Curtis.

#1: DSP5200SE|DSW.2|218|210|506.2|504
#2: Prime/PSU|SOtM sMS-200 Mini NEO SE|Focal Stellia
#3: Other stuff