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can i play 7.1 audio on 5.1.....

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  #1  
Old 5th July 2010, 08:10 AM
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can i play 7.1 audio on 5.1.....


hey bros. i have 5.1 system if i play 7.1 hd audio do i loose something in sound department or its a must to add 7 speakers for hd audio

please guide
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Old 5th July 2010, 08:25 AM
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Re: can i play 7.1 audio on 5.1.....

Depends on the source material. Most Blurays and rips are only 5.1.

Even I have only 5 speakers currently connected although my Sound Processor is 7.1 capable. I have a spare set of floorstanders which I plan to connect if I come across a 7.1 movie. I will invest in another set of dedicated surrounds only when I come across more movies in 7.1.
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Old 5th July 2010, 08:36 AM
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Re: can i play 7.1 audio on 5.1.....

Hi,

Actually, some receivers won't get into the 7.1 mode unless you connect the additional surround-back channels physically.

Not sure about your AVR receiver; however, if it is so happening that the AVR still functions in 7.1 mode even without adding 2 channels, I am sure if you room is on the larger side, you would miss the "wide surround" that you get out of the 7.1 and enhancement of the surround that is done by the additional 2 channels. This can be easily felt in larger rooms; we have experienced this in Srinisundar's place. After adding dipoles, the sorround stage greatly improved. With the addition of 2 channels, it will definitely create a wide surround effect.

As Santosh mentioned, it depends on the source material and the way it is processed. For example, while we were watching Ayan (tamil movie by Surya), the left channel seemed louder and functioned like a front channel; we thought it could be due to some issues with speakers, but the same thing happened in other setups as well and even in the blu-ray rip and then we concluded that it was processed in that way.

Simply put, the difference will be obvious in bigger rooms, because of the sound the 2 channels are filling in and the speaker placements; otherwise, you would not miss much!

Cheers!

P.s.: I am sure some experts will render better information.
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Old 5th July 2010, 09:19 AM
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Re: can i play 7.1 audio on 5.1.....

thanks brothers
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Old 5th July 2010, 12:23 PM
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Re: can i play 7.1 audio on 5.1.....

Quote:
Originally Posted by svenkateshsmart View Post
Hi,

Actually, some receivers won't get into the 7.1 mode unless you connect the additional surround-back channels physically.

Not sure about your AVR receiver; however, if it is so happening that the AVR still functions in 7.1 mode even without adding 2 channels, I am sure if you room is on the larger side, you would miss the "wide surround" that you get out of the 7.1 and enhancement of the surround that is done by the additional 2 channels. This can be easily felt in larger rooms; we have experienced this in Srinisundar's place. After adding dipoles, the sorround stage greatly improved. With the addition of 2 channels, it will definitely create a wide surround effect.

As Santosh mentioned, it depends on the source material and the way it is processed. For example, while we were watching Ayan (tamil movie by Surya), the left channel seemed louder and functioned like a front channel; we thought it could be due to some issues with speakers, but the same thing happened in other setups as well and even in the blu-ray rip and then we concluded that it was processed in that way.

Simply put, the difference will be obvious in bigger rooms, because of the sound the 2 channels are filling in and the speaker placements; otherwise, you would not miss much!

Cheers!

P.s.: I am sure some experts will render better information.
If the source material is 7.1 (hardly found) and you receiver is only 5.1, you are still not missing anything... Be it Dolby Digital or DTS any source on 7.1 is backwards compatible to 5.1.. So you are not missing anything...

If you have 7.1 setup, u have 360 degress of sound setup. If u have 5.1 setup you have 180 degrees setup... But if you have dipole surrounds there is no need for full fledged 7.1......
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Old 5th July 2010, 01:28 PM
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Re: can i play 7.1 audio on 5.1.....

Quote:
Originally Posted by manu4panjab View Post
hey bros. i have 5.1 system if i play 7.1 hd audio do i loose something in sound department or its a must to add 7 speakers for hd audio

please guide
if you are playing a 7.1 source and have a 5.1 set up ,you do miss out on sound from sorround back channels ----this does make a difference provided the source is 7.1

even 5.1 source played back in 7.1 (ES mode) will make a difference .The back sorrounds will be output in mono mode for 5.1 and and proper 7.1 if source is 7.1



as said 7.1 sources (BD) are quiet few , a few i have watched are

Cut throat island
War
one of the Narnia movies (last one) ---and these did make quiet a difference in 7.1
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Old 5th July 2010, 02:37 PM
 
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Re: can i play 7.1 audio on 5.1.....

Quote:
Originally Posted by subhash View Post
if you are playing a 7.1 source and have a 5.1 set up ,you do miss out on sound from sorround back channels ----this does make a difference provided the source is 7.1
I am sorry but your information is incorrect. Regardless of whether the source is 7.1 or not, you do not lose out on any part of the sound on a 5.1 system. In fact in the case of small rooms a 7.1 system is totally unnecesary. Basically all 7.1 codecs are totally backward compatible with 5.1 systems. In the absence of rear surrounds, the system mixes the rear surround channels into the surround channels. Thus you do not lose any of the sound.
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Old 5th July 2010, 04:17 PM
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Re: can i play 7.1 audio on 5.1.....

thanks again bros.
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Old 5th July 2010, 04:36 PM
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Re: can i play 7.1 audio on 5.1.....

Quote:
Originally Posted by sanjay0864 View Post
I am sorry but your information is incorrect. Regardless of whether the source is 7.1 or not, you do not lose out on any part of the sound on a 5.1 system. In fact in the case of small rooms a 7.1 system is totally unnecesary. Basically all 7.1 codecs are totally backward compatible with 5.1 systems. In the absence of rear surrounds, the system mixes the rear surround channels into the surround channels. Thus you do not lose any of the sound.
but if the sound comes out of the back sorrounds as it was intended to from a 7.1 mix thro a 7.1 set up it sounds different, in fact a lot better from being downmixed to 5.1 and output thro 5.1 set up
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Old 26th November 2010, 08:41 AM
 
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Re: can i play 7.1 audio on 5.1.....

I too am upgrading just now through a Bluray player with 7.1 analog outputs. Although I have a 5.1 system, I intend to use the bluray player's decoders to output lossless format rather than a lossy compression. My concern is more on the quality of the sound than adding more channels. Set-up, including speaker size and delay times will be done via the player.
So my question is-- assuming the bluray disc that I play contains material in 7.1 format-- if I let the player decode 7.1 lossless format, then turn the rear 2 channels OFF, will the decoder:
1. Still output a lossless audio format and just omit the rear surround information? In which case I only lose the 2 rear info but still get lossless audio. OR
2. Output a lossless audio format and matrix the rear surround information into the side surrounds? In which case I still get all information through the side surrounds. OR
3. Downgrade the output to a lossy 5.1 compression, which I don't want to happen as my main purpose is to improve on fidelity? If so, what's the best workaround?

Inputs, please. Appreciate it. Thanks!


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