Help! Extracting 5.1 Dolby Digital from HDMI input (Blu-ray source)

andyptve

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Jan 10, 2018
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I have a Panasonic Blu-ray DMP-BD79 player connected via HDMI to my Samsung HD Tv, and an optical audio out from the tv to my old Yamaha Rx-795 surround sound amp. I wasn't getting Dolby Digital on the amp and after a little research found the Samsung TV doesn't pass through Dolby Digital. So after more research bought a Prozor HDMI audio extractor (3 HDMI in / 1 HDMI out and 1 spdif toslink audio out). After reconnecting everything, optical out from extractor to amp, amp still not getting 5.1 Dolby Digital - set extractor to 5.1 Ch audio out. Using Cloud Atlas Blu-ray to tedt. By default Blu-ray player outputting DTS-HD Master Audio, so switched to Eng2 Dolby Digital however this contains commentary and still not showing as 5.1 Dolby Digital on amp. Help! What am I doing wrong? I guess Blu-ray has a better than 5.1 Dolby Digital audio, but for all the extractors I've seen to have HDMI in and 5.1 Ch audio out, surely Blu-ray source must either also have regular Dolby Digital, or audio is 5.1 compatible? note: I also tried regular dvd with Dolby Digital soundtrack and amp still shows Dolby Pro logic.
 

andyptve

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Jan 10, 2018
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Player does not have separate audio out, just one hdmi out on the back, and a couple of USB 2 connectors on the front.

 
Audio extractors won't work with lossless audio like Dolby TrueHD because coax or optical audio don't carry that much data.Your receiver won't decode it either.
The commentary track may not be 5.1 encoded so it might only show as 2 channel. Try another disc and check the audio menu to see what options that disc gives you. Some may have what you want.
Check the audio set up menu in the player. You may be able to set it to only output in DD.
 

andyptve

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Jan 10, 2018
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Ok, however if I use a regular dvd (not Blu-ray) which has Dolby Digital soundtrack, the amp still shows this as Dolby Pro logic - so is Blu-ray player altering audio encoding when sending it down the hdmi cable?

 

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