Use HDMI for Audio Only
I'm trying to find a way to use the HDMI out for AUDIO ONLY. I'm plugging it into an old Sony 2.1 HTCT790. However, the unit shows up as a secondary display in the Displays panel. I don't want the Mac to burn any processing power sending a signal to an unused Displays (even if theoretically negligible. My old MBP burnt through multiple batteries from using external displays...I'm overly sensitive to the issue😂 .) I get that I can turn down resolution...or send a "blank" screen, but is there a way to have the destination simply NOT be recognized in Displays?
Further details...this Sony destination doesn't allow input via USB. I'm trying to avoid wireless due to latency. I know the backup here would be a breakout box, but wondering if it's not necessary.
Mac mini (M2 Pro, 2023)