No Dolby Atmos from Sony UBP x700 Blu Ray player

  • 21 January 2023
  • 5 replies
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I have no problem getting Dolby Atmos from My fire stick Max connected directly to a EDID switch (4 in 2 out). I have set the Blu Ray player to output Dolby Atmos and the Blu ray Player display/audio menu confirms true HD/ Dolby Atmos tracks are playing but I can get no better than A Dolby Digital 5.1 audio on SONOS Arc. The Blu Ray player is plugged in directly beside the fire stick Max on my EDID switch and is connected with a 48GB HDMI cable. Does any one know where my bottleneck may be?


5 replies

Are the connections to the Sonos Arc (presumably from your switch/extractor) an HDMI-ARC connection or an eARC connection? - you need an eARC connection for Dolby TrueHD (uncompressed) audio whereas the FireTV 4K Max can use an HDMI-ARC connection, as the DD+ Atmos audio from that device is uncompressed. So perhaps that’s what is happening here - it’s just not clear from your post what type of HDMI ports are in use in the setup.

Ahh! I in fact DO NOT have an eARC HDMI output on My TV. It is confusing to say the least. Can I assume that if My Blu Ray player can output Dolby Digital plus content than, that I can get Uncompressed Dolby Atmos sound? Sounds to me like you are saying the Blu Ray player can only deliver TrueHD audio via an eARC HDMI connection. My point is how does the fire stick get around this hurdle yet the BD payer does not? Thanks

 

Ahh! I in fact DO NOT have an eARC HDMI output on My TV. It is confusing to say the least. Can I assume that if My Blu Ray player can output Dolby Digital plus content then, that I can get Uncompressed Dolby Atmos sound? Sounds to me like you are saying the Blu Ray player can only deliver TrueHD audio via an eARC HDMI connection. My point is how does the fire stick get around this hurdle yet the BD payer does not? Thanks

The Blu-Ray disc you’re playing is going to be encoded in Dolby TrueHD ..it would need transcoding to DD+ (Atmos). I don’t know of a player that does that, personally speaking. I’ve only ever seen them transcode to DD 5.1, or of course fallback to PCM stereo.

Somewhat irrelevant here, but with DTS HQ/X uncompressed audio discs (not supported by Sonos) users with eARC tend to set their players to transcode the audio to multichannel Linear PCM audio and those that have ARC only ports on their TV will transcode the audio to compressed DTS 5.1 (which is now supported by Sonos) but there’s no support for Atmos here either. 

What should work for you is to perhaps bypass your TV using an audio extractor with eARC support, such as the HDFury Arcana, or Feintech VAX04101A etc. I use the latter one myself.

Anyhow I hope that info. assists.

THANKS I was just about to order the HDFury Arcana when your post appeared. I looked into the Feinteck device but read some less than favourable reviews? Are you happy with it?

 

THANKS I was just about to order the HDFury Arcana when your post appeared. I looked into the Feinteck device but read some less than favourable reviews? Are you happy with it?

Yes, I’m really happy with the Feintech device, it works great here and have heard lots of good things about the Arcana too. I went for the Feintech device as it has a built-in HDMI switch (3 connected devices). 

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