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Old 03-15-2014, 05:33 AM   #1
Ed Dixon
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HDMI and Dolby

Have a Roamio connected to a Samsung SmartTV. Even though set for Dolby, sound output from TV to AV received is only 2 channel. Seems like Roamio doesn't pass Dolby via HDMI.

Other video/audio direct from TV (Netflix, etc) work correctly for Dolby 5.1.

Do I need a separate optical from Roamio to get Dolby 5.1?
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Old 03-15-2014, 05:56 AM   #2
JohnS-MI
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Quote:
Originally Posted by Ed Dixon View Post
Have a Roamio connected to a Samsung SmartTV. Even though set for Dolby, sound output from TV to AV received is only 2 channel. Seems like Roamio doesn't pass Dolby via HDMI.

Other video/audio direct from TV (Netflix, etc) work correctly for Dolby 5.1.

Do I need a separate optical from Roamio to get Dolby 5.1?
Yes, use an optical cable from Roamio to AVR (any unused optical input, but you may have to assign the input to a named device). I had to do this and it works. Either turn off TV speaker or run its volume to zero as the synch won't be quite perfect.

I'm no expert on HDMI, but there is apparently a "handshake" at the beginning of communication where the two devices negotiate "common ground." Most TVs only decode Dolby from their internal tuners, not their HDMI inouts, and hold out for stereo in the negotiation.

Edit: Thank you, Tivo, for providing the optical output for those of us with olders AVRs, TVs that won't pass Dolby from HDMI inputs, etc. I also have a Roku and solving the problem there was more difficult due to lack of optical out. HDMI is not the panacea it is billed as. Just sayin'.
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Old 03-15-2014, 06:21 AM   #3
gmacted
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Quote:
Originally Posted by Ed Dixon View Post
Have a Roamio connected to a Samsung SmartTV. Even though set for Dolby, sound output from TV to AV received is only 2 channel. Seems like Roamio doesn't pass Dolby via HDMI.

Other video/audio direct from TV (Netflix, etc) work correctly for Dolby 5.1.

Do I need a separate optical from Roamio to get Dolby 5.1?
I have my Roamio Pro connected via HDMI directly to my AVR and I get Dolby 5.1 with no problems.

I think the problem lies in your Samsung SmartTV. My guess would be that your TV is not passing the Dolby Digital to your AVR. I think other "direct" video/audio works because it originates from the TV and not from an external source.

In most instances, TVs cannot pass through Dolby Digital from another HDMI device. It has to do with HDCP digital rights. Google it. It seems to be a fairly common issue.

Last edited by gmacted : 03-16-2014 at 07:13 AM.
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Old 03-15-2014, 07:35 AM   #4
Joe01880
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What type of receiver do you have. I use a Pioneer Elite vsx-60. I run my Roamio Pro into the receiver then out to my Sony NX810 TV. 5.1 plays just fine.
Both audio and video will pass through if i want to leave the receiver turned off, I never do.

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Last edited by Joe01880 : 03-15-2014 at 11:11 AM.
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Old 03-15-2014, 07:38 AM   #5
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Repost. Sorry!
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Roamio Pro- $99 yearly grandfathered MSD
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TiVo HD- 2TB w/ PLS For Sale $350
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DVR40- yours if you want it
Connected via Ethernet
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