analogue vs digital out on Oppo BDP 95

Steven Simon -- Fri, 04/15/2011 - 10:13

 This is actually a set up question.  I've got an Onkyo 707 AVR.  What I'd like to do is use the analogue outs on my Oppo when I listen to music (CD/SACD), but the HDMI out when I watch movies.
 
The issue is that the Oppo and HDMI and analogue outputs are always active.  And there doesn't seem to be a convenient way on the AVR to deactivate the HDMI input when using the analogue inputs.
 
Any suggestions?
 
 
Thanks
S
 
 

trponhunter -- Fri, 04/15/2011 - 18:35

Set up 2 different inputs on the receiver, one for movies with hdmi, and one fo music with analogue outputs-BUT- it's very possible that the hdmi output will sound better for music as well because I believe that your recorder will convert all analogue sources to digital, putting it through the inernal d to a converter, so if you go through the d toaz converter in the receiver, then the performance should be lower if you enter into the receiver analogue- if you do, you will simply be putting the signal through an additional d to a stage, and your performance won't be better then the lowest common denominator anyway- which is the internal d to a in the receiver.

trponhunter -- Fri, 04/15/2011 - 18:43

Set up 2 different inputs on the receiver, one for movies with hdmi, and one fo music with analogue outputs-BUT- it's very possible that the hdmi output will sound better for music as well because I believe that your recorder will convert all analogue sources to digital, putting it through the inernal d to a converter, so if you go through the d toaz converter in the receiver, then the performance should be lower if you enter into the receiver analogue- if you do, you will simply be putting the signal through an additional d to a stage, and your performance won't be better then the lowest common denominator anyway- which is the internal d to a in the receiver.

Steven Simon -- Sat, 04/16/2011 - 09:24

 Thanks. Just to be sure I understand you, I want to be clear that I'd really like my source component -- the Oppo 95 -- to do the decoding work because its converters are a lot better than the ones in my AVR.
S

trponhunter -- Sat, 04/16/2011 - 21:22

Re read my response. Find out if your rreciver digitizes all analogue inputs going into it ( which it most likely does). If that's the case, using the oppo d to a and then going analogue into the receier will sound worse than digital out of the oppo into the reciever.

Steven Simon -- Sun, 04/17/2011 - 07:42

 I got it. Will check.
thanks
S

trponhunter -- Sun, 04/17/2011 - 08:47

Steve, just so you can understand it better, think of it like this- there is a loss of resolution every time that you go through a do to a stage or a to d stage. If you need to go to digital once it is in the receiver, then you are limited to the sound quality the d to a in the receiver has. Taking a digital soucre ( cd) an then converted it to analogue in the oppo to only have to go back to digital again in the receiver, then back to analogue when it exits the receiver, does not make sense, it only subjects your signal to an additional a to d then d to a again. If your receiver converts everything to digital and you seem to think the oppo's analogue outputs sound better than the digital into the receiver, then it is only the added warmth and smear that the additional do to a provides. Many people confuse the added warmth ( which is usually only "smear") that the analogue outputs have versus the more correct digital - of course, this is only true if your receiver will convert analogue inputs to digital. Some receivers have direct analogue pass through - but not many. Also, even if your receiver has a pass through, it will convert the signal if you are using the bass management- so, odds are pretty strong that your signal will be digitized once it enters the receiver, leavin the analogue outputs of the oppo to be more colored than going directly digital into the receiver.

mecolwell -- Wed, 05/25/2011 - 09:21

I would think that the BDP-95's reference Sabre dedicated two channel output would better most reciever's internal DACS.
That said, I have my BDP-95 feeding my system a few ways.
HDMI to my Onkyo PR-SC885 controller (bitstream) for films, and Multi-channel SACD (DSD direct).
For two channel, CD and SACD, I feed the 2 channel Oppo outs to another input on the Onkyo for it's "pure Audio" mode. I can also use the Audyssey processing too, if I wish.
Finally, I also feed the 95's two channel outs bypassing the Onkyo direct to my main L-R channel amp, a tubed JoLida 503, which, with it's volume at "max" functions as a power amp, and I feed one input from the Onkyo, another from the 95..I have to use the volume control on the JoLida then, but it is the most direct source path.
I would venture to say that the 95's Sabre DACs better most all other CD players, equalling the best, like the Cambridge 840 (better, equal??), and probably most stand-alone SACD players, too.
What do you all think about that??

VinylGuy

trponhunter -- Wed, 05/25/2011 - 09:50

 the superiority of the sabre dacs only matter if you can avoid converting back to digital in your surround receiver or processor. if you need to go back to digital in the proceossr, than you are better of going into the unit digital, rather than running through an additional digital to analog stage. since a d to a stage has to introduce degredation , than eliminating it is better if you need to go through the stages in the reciever. if your receiver or processor has a pure analog bypass - which does not go therough the d to a - then the sabre dacs of the oppos may very well be better. Remember, if you use the bass management in the reciever, then this is a guarantee that you are converting to digital in the reciever. also, if you use the audyssey processing, then you are converting to digital in the receiver. 

mecolwell -- Wed, 05/25/2011 - 20:19

Yes, absolutely right, that one must keep the signal in the analog domain after the DAC'S decode it for the best sound.
That's why my best sound comes from the Oppo straight to my tube amp, then the next best is with the Controller set in the "pure audio" mode, which bypasses all digital and shuts off the video and displays.
Using Audyssey on occasion will be the last choice, but sometimes useful.

VinylGuy

ls111553@yahoo.com -- Mon, 06/27/2011 - 11:15

What about bass management in the OPPO 95 itself? Manual says that bass management adjustments only apply to the player's analog outputs. Does this mean (hopefully) that, for  multichannel SACD, the player is not converting the DSD > analog data back to digital (PCM?) in order to set speaker size / sub / crossovers and then back to analog? This would defeat the purpose of its much-praised analog outputs.
Considering this issue before buying...
Thanks!

glmoneo@audiovi... -- Tue, 03/06/2012 - 15:18

Let me see if I understand this correctly: you are all stating that most A/V receivers with 5.1 or 7.1 ANALOG inputs are going to take the already decoded and converted ANALOG signal it receives from the ANALOG outputs of a source component, and then reconvert that already converted signal back to DIGITAL and then reconvert it back to ANALOG?

Huh?

Are we off our meds here, or what?

trponhunter -- Thu, 03/08/2012 - 14:58

 Correct - most av recievers will always digitize any input signal - you need to check with the specific receiver to verify. One way to be sure you are digitizing the signal is if you are using the bass management of the receiver. Once you use the internal crossovers or room correction software, that's pretty much a guarantee that you are in the digital domain. 

All content, design, and layout are Copyright © 1999 - 2011 NextScreen. All Rights Reserved.
Reproduction in whole or part in any form or medium without specific written permission is prohibited.