Analog Audio vs Digital Audio - AVS Forum
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post #1 of 45 Old 09-12-2007, 10:49 AM - Thread Starter
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Does a movie sound as good using Analog audio as it would if we use Digital Audio? Most receivers will process the analog audio and create the 5.1, correct?

I guess Digital audio allows for 5.1 digital surround and the receiver does have to worry about conversion.

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post #2 of 45 Old 09-12-2007, 11:25 AM
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Quote:
Originally Posted by penngray View Post

Does a movie sound as good using Analog audio as it would if we use Digital Audio? Most receivers will process the analog audio and create the 5.1, correct?

I guess Digital audio allows for 5.1 digital surround and the receiver does have to worry about conversion.

It's not clear what you are asking. Do you mean a 2-channel (R/L) analog connection?

If you mean using a 2-channel analog connection from your player to your receiver, then you are only sending a 2-channel stereo signal to the receiver and are using the receiver to "create" multichannel surround sound from a 2-channel source using DPLII or DTS NEO:6. This is not true, discreet 5.1 channel sound.

Unless your player has multichannel analog outputs, the only way for you to get true, discreet 5.1 channel sound (DD5.1 or DTS5.1) is to use a digital connection from your player to your receiver, and the receiver will decode this digital signal properly into DD/DTS 5.1 surround sound.

Is there some reason you can't connect your player to your receiver digitally?

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post #3 of 45 Old 09-12-2007, 12:31 PM - Thread Starter
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It's not clear what you are asking. Do you mean a 2-channel (R/L) analog connection?

Sorry about that....


I have been switching digital audio throughout my house for the past 9 months but recently I decided to try analog audio (R/L) connections instead. All sources have analog audio and all zones have the ability to do analog audio so its just so much "cleaner". I dont have sources locally in rooms, everything is centralized in an AV closet. Except my 5.1 receivers in the family room and bedroom.

My family room was getting a digital signal before and it was great, my receiver gave me great surround sound. Now, I have analog audio and it just isnt that great.

Obviously Im sort of answering my own question here about analog vs digital but maybe its just my "cheap" Receiver and maybe if I upgrade I can get quality 5.1 sound processed from analog audio.

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post #4 of 45 Old 09-12-2007, 12:46 PM
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Originally Posted by penngray View Post

.....................maybe if I upgrade I can get quality 5.1 sound processed from analog audio.



How can you get real 5.1 sound from a 2-channel analog connection? You can't. The only thing you can get will be synthesized, pseudo-5.1 sound (DPLII/DTS NEO:6). If your receiver has a digital input, then use it if you want true 5.1 audio. Unless your current receiver can't do Dolby Pro-Logic II, upgrading it won't help you with anything at all regarding deriving 5.1 channel sound from a 2-channel analog stereo signal.

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post #5 of 45 Old 09-12-2007, 01:04 PM - Thread Starter
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You can't. The only thing you can get will be synthesized, pseudo-5.1 sound (DPLII/DTS NEO:6).

That is what I meant..and its not as good as true 5.1 audio.

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post #6 of 45 Old 09-12-2007, 01:34 PM
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Quote:
Originally Posted by penngray View Post

That is what I meant..and its not as good as true 5.1 audio.

So, can your current receiver not do DPLII?

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post #7 of 45 Old 09-12-2007, 02:25 PM
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Analog audio (red/white) can only provide a "matrixed" surround effect (using DPL, DPLII, etc) using an appropriate decoder/receiver .

Digital Audio (coax, optical) can provide "discrete" surround channels (using DD, DTS) using an appropriate decoder/receiver .

One exception would be if using analog audio from a source/destination device(s) that supports multichannel outputs/inputs. That requires six audio cables and the appropriate source device and ...an appropriate decoder/receiver.
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post #8 of 45 Old 09-12-2007, 03:36 PM
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I would only use 2 channel analog audio for legacy equipment where that was the only option, i.e., a VCR. Everything else, I'm using multi-channel or digital audio.

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post #9 of 45 Old 09-12-2007, 03:37 PM
 
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Quote:
Originally Posted by penngray View Post

That is what I meant..and its not as good as true 5.1 audio.

Well, no. It's stereo. To get 5.1 you either need to run six analog cables from a decoder, or you need to run a digital cable to a decoder or receiver that decodes 5.1 somewhere where you want it.

Otherwise you're just getting stereo. You can always use PL type processing on it, but it's not the same as discrete 5.1.
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post #10 of 45 Old 09-12-2007, 04:09 PM
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Uh, yeah... I must not have been clear enough in post #7.
Thanks for the clarification.
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post #11 of 45 Old 09-12-2007, 06:00 PM
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As evidenced by Post#5, I think he knows the caveats of using a 2-channel connection.

Still don't really understand why that is his preference, though.

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post #12 of 45 Old 09-12-2007, 07:45 PM
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It would help to know the model of the equipment used.

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post #13 of 45 Old 09-12-2007, 08:05 PM
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So disappointing. The title is “analog audio vs digital audio”. But the thread is really all about digital audio only.

Ed
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post #14 of 45 Old 09-12-2007, 08:14 PM
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if you're hard wired you may just be able to use one of your RCA analog audio jacks as a digital coax cable. it's all just copper wire.

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post #15 of 45 Old 09-13-2007, 05:51 AM - Thread Starter
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So, can your current receiver not do DPLII?

I will have to check that...Its the Poineer VSX-816, very cheap but decent in what it did for me when I had digital audio.

This is a full house video/audio distribution issue too so I can not just connect a single source (DVD player) using digital audio if I choose too. I have too either run analog audio everywhere or digital audio everywhere in the house since I can only switch one or the other.

I ran digital audio everywhere for 9 months but I just switch to analog audio and Im shocked at the difference. I can only assume that my "crappy" receiver.

Quote:


Well, no. It's stereo. To get 5.1 you either need to run six analog cables from a decoder, or you need to run a digital cable to a decoder or receiver that decodes 5.1 somewhere where you want it.

I remember connecting my DVD player for years directly to receivers (nothing special either) and letting the receiver create the 5.1 sound. I never did a comparison between the digital audio and analog before but after having digital for nine months is not even close.

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post #16 of 45 Old 09-13-2007, 05:52 AM - Thread Starter
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if you're hard wired you may just be able to use one of your RCA analog audio jacks as a digital coax cable. it's all just copper wire.

Thanks, I have RG6 run everywher and I can connect digital again and just buy a couple of digital to analog converters and some analog to digital converters for the sources and amps that need the switching.

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post #17 of 45 Old 09-13-2007, 09:23 AM
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What receiver are we talking about?

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post #18 of 45 Old 09-13-2007, 09:28 AM - Thread Starter
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The Poineer VSX-816

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post #19 of 45 Old 09-13-2007, 11:21 AM
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Quote:
Originally Posted by penngray View Post

Thanks, I have RG6 run everywher and I can connect digital again and just buy a couple of digital to analog converters and some analog to digital converters for the sources and amps that need the switching.



What is it you are trying to do, exactly, penngray.

Describe it in detail.

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post #20 of 45 Old 09-13-2007, 05:02 PM
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Sound Supported: Dolby Digital EX (6.1), Dolby Pro-Logic IIx, DTS Neo:6, DTS-ES

http://electrified.com/Catalog/Items...e&ItemID=28250

Looks like you can do digital audio and use Dolby Digital EX, Pro-Logic IIx or the DTS flavors, or use PL IIx or Neo:6 on analog audio.

Personally, I can't see using analog if digital is available on a DVD player, but to each their own.

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post #21 of 45 Old 09-14-2007, 05:30 AM
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Quote:
Originally Posted by penngray View Post

Thanks, I have RG6 run everywher and I can connect digital again and just buy a couple of digital to analog converters and some analog to digital converters for the sources and amps that need the switching.

no need for converters a composit jack for anything is the same for everything if you just take say the left wire for analog and connect it to SPDIF it will carry a digital signle

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post #22 of 45 Old 09-15-2007, 06:51 AM
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Being a newbie I need some help.

I have PS3 and Yamaha RX-V3800. The PS3 gives me a choice of selecting Bitsream or LPCM. Which one is best for me to choose?
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post #23 of 45 Old 09-15-2007, 08:34 AM - Thread Starter
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no need for converters a composit jack for anything is the same for everything if you just take say the left wire for analog and connect it to SPDIF it will carry a digital signle

Yes, I did that already for nine months...just switched to analog recently and found out how much worse it is (without great DACs).

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post #24 of 45 Old 09-15-2007, 08:37 AM - Thread Starter
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What is it you are trying to do, exactly, penngray.


My original point was that analog sucks for movies compared to digital. I wasnt really aware it was that bad. I run digital Audio throughout my house for nine months and recently switched to analog for some minor reasons.

I really wanted to understand why it wasnt even close and if there are ways to improve the analog audio enough to be close to digital audio.

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post #25 of 45 Old 09-15-2007, 12:23 PM
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Quote:
Originally Posted by penngray View Post

My original point was that analog sucks for movies compared to digital. I wasnt really aware it was that bad. I run digital Audio throughout my house for nine months and recently switched to analog for some minor reasons.

I really wanted to understand why it wasnt even close and if there are ways to improve the analog audio enough to be close to digital audio.

How do (did) you run digital audio throughout your house?

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post #26 of 45 Old 09-20-2007, 02:09 PM
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Quote:
Originally Posted by sivadselim View Post

How do (did) you run digital audio throughout your house?

Yes, how? VERY interested.

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post #27 of 45 Old 09-20-2007, 02:14 PM
 
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The reason is simple. Digital audio is more dynamic than analog audio. Thats all there is to it.
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post #28 of 45 Old 09-20-2007, 02:23 PM
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Being a newbie I need some help.

I have PS3 and Yamaha RX-V3800. The PS3 gives me a choice of selecting Bitsream or LPCM. Which one is best for me to choose?
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post #29 of 45 Old 09-20-2007, 02:31 PM
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Quote:
Originally Posted by Splicer010 View Post

Digital audio is more dynamic than analog audio.

Can you expand/qualify that statement?
(other than what's been explained in the previous posts in regard to digital vs. analog audio connections)
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post #30 of 45 Old 09-20-2007, 03:12 PM
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Quote:
Originally Posted by Splicer010 View Post

The reason is simple. Digital audio is more dynamic than analog audio. Thats all there is to it.

Um...NO. The reason he is noticing it with the connections he has is that he went from listening to discrete 5.1 DD or DTS tracks with LFE to listening to downconverted stereo tracks decoded using Dolby PLII. Your statement is false and invalid.
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