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Macbook Pro 16" M2 Max + Valerion Vision Master Pro 2 + Sonos Arc Ultra

  • March 9, 2026
  • 1 reply
  • 11 views

Hi, I’m having issues with Dolby audio being muffled. I’m using my Macbook’s HDMI port to connect to Valerion projector HDMI input 1, and then using HDMI eARC on Valerion to connect to Sonos Arc Ultra. I’m using VLC as a media player. I have a TrueHD Atmos 7.1 movie which plays audio as it should. But when I play any DDP 5.1 movie - the audio is muffled. No matter what I do, I can’t get audio to sound right even on Mono or Stereo setting, it’s always muffled. When I switch the audio output to AirPlay to Sonos, I loose the Dolby part but at least it sounds right. I tested it on more than one DDP 5.1 movies, all suffer from this.
If I skip the Macbook and just use Valerion with a streaming service such as Netflix or HBO Max and connect it to Sonos with eARC, it plays Dolby Atmos as expected.

1 reply

Airgetlam
  • March 9, 2026

The Sonos can’t recognize that the signal is coming from the MacBook, the computer in the Valerion (CEC) is all that it recognizes, and the type of signal it is being presented. 
 

I suspect the MacBook is having trouble presenting an appropriate signal to the Valerion, but you’ll likely get better information from a Mac board, or one specific to the player software on the Mac. Sonos will essentially play what it is handed by the Valerion.