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A question about Dolby Digital Plus and it's benefits. (1 Viewer)

Inspector Hammer!

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I have an Onkyo TX-SR503 reciever and just got my first Blu-ray player a couple of weeks ago, it doesn't offer DDTrueHD or DTSHD but it does support DD+. I just switched from using my optical out to using my RCA jack multi-channel inputs today because I was told that this was the only way I could employ DD+, is this correct?.

Also, with this reciever being a couple of years old now am I getting the full benefit of DD+? This is what i'm most interested in getting the answer to because if all i'm getting is the same as what I was getting from my optical output i'm going to switch it back the way it was.

I guess what i'm asking is are the benefits of DD+ noticable on ALL existing DD recievers?

Thanks. :emoji_thumbsup:
 

gene c

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From what I have read DD+ is the discreet 7.1 version of the AC-3 5.1 DD. This is probably a bit simplistic as it also offer a higher bit rate than DD. It's said to be backwards compatible with all DD receivers but I'm assuming they mean those with 7.1 channels. I would also think that would mean it's transferrable via optical and coaxial inputs and not just analog but I don't remember reading anything about that. It did mention HDMI and iLink, however.

I'm not sure if there is much sonic improvement while watching a 5.1 dvd but the higher bit rate (1.7 Mbits vs. 640 kbits) suggests that there might be.

Perhaps a look at Dolby's web site could clarify things a little more.
 

Adam Barratt

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There is really no benefit, as far as Dolby Digital Plus is concerned, to using multi-channel analogue inputs on your particular receiver. On Blu-ray DD+ is used to add extra channels, not to increase resolution. What you're hearing through the analogue insputs will only ever be the standard 640kbps 5.1-channel audio you would also get using the receiver's standard S/PDIF digital inputs, as your amp doesn't include 7-channel analoue inputs. The bass management is likely to be better in your receiver than the player, though, so the advantage would probably lean toward your previous connection method.

I wouldn't really worry about it, though. Dolby Digital Plus with more than six channels of audio will never be a significant presence on Blu-ray (at least as a primary soundtrack) so the chances of you actually encountering a disc with extra channels that you can't use are minimal.

You should probably keep the multi-channel connection though, if only for PCM soundtracks. What model Blu-ray player is it? I've never heard of one that would process DD+ and not TrueHD as well.

Adam
 

Inspector Hammer!

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Okay, I have a decision to make right now, I decided to tear my system apart and reconfigure my componants on my rack and it's still pulled out with the back exposed, so i'm at a cross roads of sorts, do I restore my old connection or go with the analog connections? I suppose I could connect both since the inputs and outputs on my gear are all active.

I did watch Walk Hard The Dewy Cox Story tonight on BD and the rears seemed to be a tad brighter using the analog connections, I also sampled Die Hard and Cloverfield on BD and again the rears seemed amped up a bit, LFE was also plentiful and tight.

I think at this point i'll go with the analog connections but like I said it won't do any harm to connect both.

My player is the Sony BDP-S300 and it indeed only offers DD+ and no DDTrueHD, i'm hoping that a firmware upgrade in the future might rectify that.
 

Inspector Hammer!

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I'm so glad that I left the multichannel inputs connected, I do notice an improvement in DD over the digital inputs, my friend and I watched Live Free or Die Hard on BD yesterday and it sounded fantastic through the MC terminals. :emoji_thumbsup:
 

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