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In Reply to: RE: a newbie question.. posted by cloudwalker on September 27, 2016 at 23:13:59
Yes with a DVD the receiver matrices the additional 2 channels, on Blu-ray they are discrete channels. The linked article is a pretty good read for understanding surround sound.
I am still confused... how many audio tracks are on a standard DVD? How many on a 7.1 DVD? Or a 7,1 Blu Ray disk? How many are on an Atmos disk? Do you need a special Blu Ray player for that? Do you need a special interface for Dolby Atmos?
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Normally there are up to 6 discreet channels (5.1) on a DVD, with the exception of DTS-EX Discreet 6.1 which added another discreet channel for a total of 7 discreet channels. So if you include DTS-EX discreet then there can be up to 7 discreet channels on a DVD. I say up to because you can have as little as 2 channels and matrix them to 5.1 or even 6.1/7.1 but there would still only be 2 channels just as a 5.1 channel DVD matrix processed to 7.1 channels is still only 6 discreet channels. A DVD does not have room for the additional channels so they have to be matrix processed by the receiver so for 7.1 there are 6 discreet + 2 matrix channels.
A Blu-ray disk has space for up to 8 discreet channels so no matrix process is needed for 7.1 channels. A Blu-ray disk can have less than 8 discreet channels. If it has less, say 5.1 channels, it would have 6 discreet channels. It could also have 6 discreet channels (instead of 8) + 2 additional matrix channels to make 7.1 channels.
If it is a 9.1/9.2/11.1/11.2 channel Blu-ray disk then the additional channels are matrix processed similar to the additional channels on a DVD.
For Dolby Atmos and DTS:X look at these articles:
I think I understated everything. Hard to believe someone thought we needed 64 pairs of speakers. Seems to me a 6.1 system is adequate (5,1 + a speaker overhead to make sound 3 dimensional) I wonder how many speaker terminals they will try to put on the back. I read that a simple coax cable will not work (Only HDMI). Wonder why?
That is for commercial use. I was thinking the same thing, 64 speakers seems like a lot even for a very large cinema movie theater. I don't think they are required to use that many though, I'm sure they can install much less.
I think for home owners that go the Atmos surround sound route most will settle for 5.1.2 with a smaller percentage going for 7.1.2 or even 7.1.4. People with a large dedicated home theater room (projector style) maybe 9.1.4/9.2.4 or even 11.1.4/11.2.4.
Manufacturers only use HDMI (no coax) to carrier the high def digital data signal for video and audio because of the required content protection (HDCP). You can use the same HDMI cables you are already using for HD Audio/1080p/4K.
the video experience?
It seems to me a great way, however, of introducing a lot of inexpensive loudspeakers when just a few good ones would have done a far better job, but at greater overall cost.
Of course, selling to an audiophile, one makes a killing in home theater!
It seems to me 5.1 is fine. Add a ceiling speaker (since a "floor" speaker is impractical), and you get that 3D affect.
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