DTS or DD for 360 Add-on - High-Def Digest Forums
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Old 06-26-2008, 02:43 PM
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Default DTS or DD for 360 Add-on

Finally upgraded to surround sound to go along with my HD-DVD add-on and my PS3 (yes, boo-hiss, I know). Anyway, my question is which setting should I use for the audio output, the DTS or the Dolby Digital?

I know that the DTS has a higher bitrate, so should sound technically better. However, since the TrueHD and DD+ tracks are Dolby, would those tracks play better output at Dolby Digital. Or is the bottom line that the Xbox converts all the audio codecs to PCM, and then reconverts it to whatever I select to be passed onto the receiver (making the higher bitrate DTS better)?

I've tried switching between outputs while watching some movies, but haven't noticed much of a difference. However, I am new to surround audio so I don't really have the most trained ear yet (it took me a few weeks to truly appreciate the PQ of HD-DVDs and Blu-rays, now I can't watch SD stuff anymore).

Bottom line, what are the pros and cons of each, or is one simply better than the other? Thanks, I appreciate any info you might be able to help me with.

P.S. Please don't bother pointing out that I would get better sound quality out of a SA HD-DVD player. I know that, but the 360 add-on was my first jump into HDM, and with its recent demise (and my inability to find reasonably priced "dead" electronics) I have decided not to buy any new HD-DVDs unless the price is great. Therefore, I have no intention of buying a new HD-DVD player when my blu player can play all the high def audio codecs. (Sorry, but it's my pet peeve when I ask 360 add-on related questions just to get 3-4 people chiming it that a SA would be better).
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Old 06-26-2008, 03:28 PM
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set the 360 add-on 2 dts in the advanced menu setting as it reads at a higher bit rate
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Old 06-26-2008, 04:04 PM
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Quote:
Originally Posted by thedude View Post
set the 360 add-on 2 dts in the advanced menu setting as it reads at a higher bit rate
DD is much more efficient and doesn't require that higher bitrate.

Not to mention the majority of tracks are downmixed to DD anyway, reencoding them to DTS adds another lossy compression step.

DD also allows options like dynamic range control, which is handy at night or if you're in an apartment.
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Old 07-01-2008, 06:10 PM
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@ PeterTHX

Can you explain a little further on the dynamic range control you mentioned? Should I go with DD instead of DTS then, since most HD DVD movies go with DD I think I should stick to it.
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Old 07-01-2008, 08:50 PM
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DTS is the way to go.
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Old 07-03-2008, 01:49 AM
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Quote:
Originally Posted by PeterTHX View Post
Not to mention the majority of tracks are downmixed to DD anyway, reencoding them to DTS adds another lossy compression step.
This is incorrect. If output is set to DTS, TrueHD and DD+ tracks will be decoded to PCM and re-encoded to DTS.
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Old 07-10-2008, 08:21 PM
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Originally Posted by Rishi View Post
This is incorrect. If output is set to DTS, TrueHD and DD+ tracks will be decoded to PCM and re-encoded to DTS.
So why go through a SECOND lossy re-encoding??? You think taking your MP3s and converting them to AAC format is going to make them sound better?

DD+ & TrueHD are meant to be converted to DD for legacy systems.
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Old 07-10-2008, 10:38 PM
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Another vote for DTS here.
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Old 07-11-2008, 10:24 AM
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Quote:
Originally Posted by PeterTHX View Post
So why go through a SECOND lossy re-encoding??? You think taking your MP3s and converting them to AAC format is going to make them sound better?

DD+ & TrueHD are meant to be converted to DD for legacy systems.
What are you talking about? Either way the PCM must be encoded to a lossy format. Whether you chose DD or DTS, the number of lossy steps is the same, that is my point. You're either doing:

DD+/TrueHD -> PCM -> DTS or
DD+/TrueHD -> PCM -> DD

Try to keep your agenda out of support postings and just provide information.
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Old 07-11-2008, 11:33 AM
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Quote:
Originally Posted by Rishi View Post
What are you talking about? Either way the PCM must be encoded to a lossy format. Whether you chose DD or DTS, the number of lossy steps is the same, that is my point. You're either doing:

DD+/TrueHD -> PCM -> DTS or
DD+/TrueHD -> PCM -> DD

Try to keep your agenda out of support postings and just provide information.
It does not work that way.

As I said DD+ & TrueHD on HD DVD are designed to be converted directly to DD, bypassing the PCM step.

Talk about agendas.
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