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How to replace your home theater pre-pro with a HTPC! - Page 6

post #151 of 166
Thread Starter 
Quote:
Originally Posted by Roger Dressler View Post

If you do the bass management prior to surround processing, you have to accept that all the speakers use the same crossover point. Indeed that can be done, but many people like to run their mains wideband and the surrounds crossed over. It just keeps all the options open to do the bass management afterward.

For PLIIx 5.1 to 7.1 processing, the recommendation is to use the same bass management as straight 5.1, and feed the PLIIx processor with the high-passed signal.

Does PLIIx 5-->7 extract any info from LCR and LFE or is it just surround channels? Maybe you know of a straightforward doc or article that explains how it works. Can't say I have ever looked into it eek.gif
post #152 of 166
Quote:
Originally Posted by Nyal Mellor View Post

Does PLIIx 5-->7 extract any info from LCR and LFE or is it just surround channels?
No, just the surrounds.
Quote:
Maybe you know of a straightforward doc or article that explains how it works. Can't say I have ever looked into it eek.gif
PLIIx is an alternate use of the PLII processor. PLII takes in 2 channels and outputs 5 (max, but can also do 4 or 3).

If fed a 2-ch L/R pan it outputs L/C/R. If one of the input signals is inverted, it pans L/Ls/Rs/R. So connecting the surrounds of a 5.1 source to the PLII decoder, with one of the signals inverted, you get Ls/Lb/Rb/Rs. In a nutshell.
post #153 of 166
Thread Starter 
Quote:
Originally Posted by Roger Dressler View Post

No, just the surrounds.
PLIIx is an alternate use of the PLII processor. PLII takes in 2 channels and outputs 5 (max, but can also do 4 or 3).

If fed a 2-ch L/R pan it outputs L/C/R. If one of the input signals is inverted, it pans L/Ls/Rs/R. So connecting the surrounds of a 5.1 source to the PLII decoder, with one of the signals inverted, you get Ls/Lb/Rb/Rs. In a nutshell.

So presumably if you are just doing 5-->7 with PLIIx then you could put the surround processing after the bass management with no ill effects (which probably covers most use of surround processing algorithms these days anyway I would image).
post #154 of 166
Quote:
Originally Posted by Nyal Mellor View Post

So presumably if you are just doing 5-->7 with PLIIx then you could put the surround processing after the bass management with no ill effects (which probably covers most use of surround processing algorithms these days anyway I would image).
If you are making a product for commercial sale with PLIIx, it also has has to support 2-ch sources. In my system, I play everything as 7.1, but 95% of my music starts as 2-ch. Yes, movies/TV mostly start from 5.1.
post #155 of 166
Quote:
Originally Posted by Nyal Mellor View Post

I'm also offering a couple of options which are essentially the HTPC I built and is documented at the blog post referred to on pg1. I just started offering these at end of Jan: Acoustic Frontiers Media Server 1, Acoustic Frontiers Media Server 2.
Good options for those who don't want to fully DIY. One question I have around Dirac, does it only work through a USB - > DAC or sound card -> DAC, will it work outputting to an pre-amp over HDMI?
post #156 of 166
Quote:
Originally Posted by matthewa View Post

Good options for those who don't want to fully DIY. One question I have around Dirac, does it only work through a USB - > DAC or sound card -> DAC, will it work outputting to an pre-amp over HDMI?

You can select any available audio output device in the Dirac processor in "runtime"
post #157 of 166
Quote:
Originally Posted by matthewa View Post


Good options for those who don't want to fully DIY. One question I have around Dirac, does it only work through a USB - > DAC or sound card -> DAC, will it work outputting to an pre-amp over HDMI?

Yes.

post #158 of 166
Quote:
Originally Posted by Nyal Mellor View Post

I'm also offering a couple of options which are essentially the HTPC I built and is documented at the blog post referred to on pg1. I just started offering these at end of Jan: Acoustic Frontiers Media Server 1, Acoustic Frontiers Media Server 2.

Very handsome units. It would seem that adding the exaSound would almost double the price?
post #159 of 166
Is it possible to design a HTPC black box with HDMI in and HDMI out that can can just function to decode the HD codecs such as DTS/DD including the expansion codecs like DPL2X?
post #160 of 166
Quote:
Originally Posted by LJG View Post

Is it possible to design a HTPC black box with HDMI in and HDMI out that can can just function to decode the HD codecs such as DTS/DD including the expansion codecs like DPL2X?

Well you aren't likely to find an HDMI input card that supports HDCP. There are in fact HDMI input cards, Blackmagic Designs makes some, but they of course won't work with HDCP.

Now you can get HDSDI input cards but you would still have to convert the HDMI to HDSDI and as expected there are few if any HDMI to HDSDI cards that will support HDCP. HDSDI is not encrypted init's base form so it's not approved as an HDCP transport.

It's quite possible though to build an HTPC with a non HDCP HDMI input. But as it would not support HDCP, there is little incentive for anybody to develop such a software package.

The primary use of non HDCP HDMI cards is camera input to editing software
Edited by Glimmie - 3/16/14 at 1:24pm
post #161 of 166
Quote:
It's quite possible though to build an HTPC with a non HDCP HDMI input. But as it would not support HDCP, there is little incentive for anybody to develop such a software package.

The primary use of non HDCP HDMI cards is camera input to editing software

I've been thinking about this as well..
What about software like AnyDVD HD and similar which are supposed to strip HDCP...would they be of any help in this scenario..?!?
post #162 of 166
Some splitters remove HDCP which would solve this problem.
post #163 of 166
But let's say I buy one of the cheap ($50) hdmi input cards from China, and hook up my satellite receiver, can I then use Jriver to process the audio signal..? It would likely output 2 or 6-channel PCM or DD.
(Forget HDCP for the moment)
post #164 of 166
Quote:
Originally Posted by Emetw View Post

Some splitters remove HDCP which would solve this problem.

That's true, I have two myself tongue.gif.

But you still need the author of your favorite media player software to write a driver interface for the chosen HDMI card. And that would also be perfectly legal because they aren't stripping HDCP, somebody else is. But as this is a DIY hack using dubious products, my guess there is not much incentive for J River to include HDMI input with their product.

BlackMagic Design does make a $200 HDMI input card. But no HDCP support of course.

http://www.blackmagicdesign.com/products/intensity
post #165 of 166
Quote:
Originally Posted by CHA View Post

But let's say I buy one of the cheap ($50) hdmi input cards from China, and hook up my satellite receiver, can I then use Jriver to process the audio signal..? It would likely output 2 or 6-channel PCM or DD.
(Forget HDCP for the moment)

Again the question is will JRiver support that card? I don't know but I am going to give Jriver at least a 30 trial myself soon.
post #166 of 166
After searching jrivers forum a bit, it seems it should work.
The HDMI-card will show as a tv-tuner card.
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