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Why is TrueDolbyHD so quiet compared to regular Dolby

5078 Views 68 Replies 25 Participants Last post by  Goatse
When I switch to true TrueDolbyHD, I need to turn up my stereo about 20 more points. When I switch back to Dobly, the volume jumps up.


Anyone else notice this?


I am using a XA2 v1.5, over HDMI cable.
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20 more points meaning 20 db?
Is your reviever 100% capable of decoding DolbyTrue HD?

Quote:
Originally Posted by thebland /forum/post/0


20 more points meaning 20 db?

No, If I am at 20 on the reciever, I need to go to O to get the same sound.



Is your reviever 100% capable of decoding DolbyTrue HD?[/QUOTE said:
How many dbs down are you then with TRUE HD?


If it is 10 db, then is is likely an LFE / bass problem. IF all channels are down the same, it may be your receiver as this is one scenario I have not read about.
20db lower on the volume control, when compared to handling a Dolby Digital bitstream, seems a little excessive. For my Denon receiver using HDMI with an A2, there is usually an 8-10db difference between decoded PCM output from the A2 (for advanced codecs) and legacy bitstream for the receiver to decode.


I'm not sure if it has been fixed yet, but the second generation Toshibas have a significantly attenuated volume when outputting the decoded PCM signal at 96 kHz. Set the SPDIF output to "bitstream" in the player setup to force a 48 kHz PCM output over HDMI. It sounds silly (stupid engineers), but that's how it works.
I am also experiencing the same problem. I am using Tosh HD-A1 with HDMI to my Yamaha HTR 6090. When I switch between Dolby Digital and DDTrue HD, Dolby Digital sounds much more louder. What am I doing wrong? I have my HD-A1 set to pcm on both audio options. Do I need to buy a new HD-DVD player or receiver with HDMI ver. 1.3 to take advantage of DDTrueHD? Can someone help me out?


FYI, I am a new user and have been following these forums for almost a year. I should of registered a long time ago. These forums are full of helpful and smart people. Also where is the "search" option?


Thank you all.

Quote:
Originally Posted by one100bill /forum/post/0


I Also where is the "search" option?


Thank you all.


Go to the top of the thread. look at the blue bar,under the advert banners, its over to the right
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I'll bet it is dialnorm (or lack thereof)...you need bitstream to get it.
In general, TrueHD should only be about 4-6db quieter than DD+. (I'm using analog outs for lossless tracks and spdif for DD+) At least that has been my experience.
They're mixed lower to allow for greater dynamic range - ie better quality.
After watching Letters from Iwo Jima today which sound's unreal! I did have to turn my receiver up much louder then I usually do for the TrueHD track. I am using the A2 and had updated it to 1.6 right before playing the movie so I guess Toshiba needs to get busy on this issue,
Easy fix for this....with PCM set for both HDMI and SPDIF outputs, turn dynamic range control off and back to full volume.

Quote:
Originally Posted by MSmith83 /forum/post/0



I'm not sure if it has been fixed yet, but the second generation Toshibas have a significantly attenuated volume when outputting the decoded PCM signal at 96 kHz. Set the SPDIF output to "bitstream" in the player setup to force a 48 kHz PCM output over HDMI. It sounds silly (stupid engineers), but that's how it works.

All current DTHD from WB or Universal are either 16/48 or 24/48khz, so that shouldn't be an issue.

Quote:
Originally Posted by thebland /forum/post/0


I'll bet it is dialnorm (or lack thereof)...you need bitstream to get it.


True HD does carry dialnorm. It has the same metadata capacity as legacy DD. The player decodes it accordingly.

Quote:
Originally Posted by DocDVD /forum/post/0


Easy fix for this....with PCM set for both HDMI and SPDIF outputs, turn dynamic range control off and back to full volume.

I concur. Turn off dynamic range control.

Quote:
Originally Posted by thehun /forum/post/0


All current DTHD from WB or Universal are either 16/48 or 24/48khz, so that shouldn't be an issue.

I'm not sure what your point is. What I was alluding to is that the player outputs the audio at 96 kHz when SPDIF is set to "PCM." It doesn't matter what sampling rate an HD DVD's soundtrack is.

Quote:
Originally Posted by gooki /forum/post/0


They're mixed lower to allow for greater dynamic range - ie better quality.

That doesn't make sense (to me). Listeners will have to turn up the volume (as per the OP) to hear dialogue and have it sound "normal" anyway, which means extreme dynamic peaks will be very challenging to amps/speakers in most HT setups.
^^^ Sorry, but I have to disagree 100%.


A whispered conversation should not be at the same volume as a shouting match next to a running subway. That's not the way the sound was mixed, and it's certainly not consistent with the director's intent. Those extreme dynamic peaks are what add to the realism of the experience. If you don't want that, stick with DD 2.0 and call it a day.


We're not talking about $500 Wal-Mart TVs with a $150 pseudo 5.1 speaker system. I would venture to guess that most people using these newer HD formats have a HT with a real subwoofer and real speaker systems. When you say HT in this forum, you are generally talking about people who have converted basment rooms or attics into dedicated theaters, and/or custom construction. For this audience, artificially clamping down the dynamic range is unthinkable.


I guess to me it's rather like going into the Porsche/Ferrari dealership and talking about how the fuel mileage of the Prius is really desirable in an automobile......
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