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» Film-Tech Forum ARCHIVE   » Community   » The Afterlife   » 6 channel analog out on blu-ray sucks

   
Author Topic: 6 channel analog out on blu-ray sucks
Brad Miller
Administrator

Posts: 17775
From: Plano, TX (36.2 miles NW of Rockwall)
Registered: May 99


 - posted 02-07-2009 06:42 PM      Profile for Brad Miller   Author's Homepage   Email Brad Miller       Edit/Delete Post 
I'm curious to know if anyone else has noticed that (at least on the Panasonic BDP-30) that the 6 RCA analog outputs absolutely suck ass. The high and low end of the frequency spectrum is GONE and it just doesn't sound flat at all. I was using the format 11 (dts) 6 channel input on a CP650 for this test.

Using that same player and taking the AC3 track direct into the same CP650 with the same disc produced excellent audio.

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Steve Guttag
We forgot the crackers Gromit!!!

Posts: 12814
From: Annapolis, MD
Registered: Dec 1999


 - posted 02-07-2009 07:17 PM      Profile for Steve Guttag   Email Steve Guttag   Send New Private Message       Edit/Delete Post 
It all depends on the processing and how the 6-channels were derived. They are not all created equal.

Compare your unit to the Denon DVD-3800BDCI. A "high-end" unit. Look at what it has for audio decoding...compare that to yours. Is it reasonable to expect there to be similar results? Price out what good D/A converters cost for audio...now price out what 6-channels worth cost...I'll wager that they far exceed the price you paid for the whole Blu-Ray player. That, effectively, is what you are listening to.

Steve

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Bobby Henderson
"Ask me about Trajan."

Posts: 10973
From: Lawton, OK, USA
Registered: Apr 2001


 - posted 02-07-2009 07:38 PM      Profile for Bobby Henderson   Email Bobby Henderson   Send New Private Message       Edit/Delete Post 
I actually thought about buying a Panasonic DMP-BD30 player when I was buying my Sony Bravia XBR series HDTV. But I opted for a 80GB PS3 instead -same $500 price, but a lot more capability. However, a PS3 doesn't have 5.1 or 7.1 analog audio outputs.

Regarding the audio problem, I'm wondering if there is an issue with how the DMP-BD30 internally decodes and outputs the audio.

The DMP-BD30 does not internally decode the full Dolby TrueHD and DTS-HD Master Audio formats. It just internally decodes and outputs the lossy versions of Dolby Digital and DTS via the 5.1 analog output. The player does bit-stream output DDTHD and DTSHD audio via HDMI. Maybe there's something missing in that as opposed to Panasonic BD players that full decoding and analog output of the next generation audio formats (DMP-BD50, DMP-BD55).

One thing to try is playing a BD movie with multichannel Linear PCM 5.1 audio to see if the audio levels are just as weak. Quite a few Sony Pictures Blu-ray movies feature LPCM 5.1 (Casino Royale, The Fifth Element and The Patriot are a few I have).

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