Audio over HDMI from SPDIF-Out on MB? - AVS Forum
Forum Jump: 
 
Thread Tools
Old 03-25-2009, 02:11 PM - Thread Starter
Advanced Member
 
Kermee's Avatar
 
Join Date: Dec 2000
Location: Mill Creek, WA
Posts: 665
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Liked: 10
Hi All-

I'm in the process of figuring out if I'm able to do the following. I'm in the exploratory stages of building a diskless (PXE Boot) xbmc HTPC boxes with VDPAU patches and the MythBox plug-in. All of these boxes will be running Ubuntu 8.10 x86_64 (Linux).

I am "recouping/reassigning" hardware (MB/CPU/Memory) from four of my eight LAN gaming machines which were built from previous Fry's CPU/MB combo deals over the years. The four motherboards being used will be some iteration of an ECS Motherboard which I have verified having SPDIF-out 4-pin headers on the motherboard from the on-board Realtek or similar integrated soundcard. These four HTPC's would be replacing four Popcorn Hour A-110's in the house.

So this leaves me finding a replacement video-card for this build which has native HDMI on the board itself which accepts SPDIF input and will give me audio over HDMI (PCM, DD, or DTS) that works under Linux/xbmc.

I've seen many nVidia 94xx/95xx PCIe cards which have native HDMI ports and an SPDIF in header on the videocard. But I know all I really need are 84xx/85xx class cards for VDPAU. So my questions are:

1. Are there any 84xx/85xx class nVidia cards with native HDMI which supports HDMI audio from an SPDIF header?

2. Are there any 94xx/95xx class nVidia cards with native HDMI which supports HDMI audio

without an SPDIF header? (I've only seen IGP versions support HDMI audio without some type of SPDIF jumper).

3. Which are the quietest iterations of any of the cards that people are recommending for HTPC's which support VDPAU? Either fan or fanless solutions.

4. Without going to an IGP solution (i.e. new motherboard), is there any way to get multi-channel LPCM (i.e. 8-channel LPCM) working over HDMI on any of the nVidia cards in a PCIe interface? Most of the content for playback on the xbmc machines will be 1080P archive videos and 1080i/720p HD channels from either OTA or Clear QAM from my local provider (mythtv backend will be running under a Xen VM using HDHomeRun's for tuners).

These four xbmc HTPC's would be fed via HDMI (A/V) into Yamaha RX-Vx65 receivers which support HDMI audio and then pumped to 1080P-class displays with HDMI.

Any help, comments, suggestions, welcomed. Thanks in advance!

Cheers, Kermee
Kermee is offline  
Sponsored Links
Advertisement
 
Old 03-25-2009, 03:41 PM
Senior Member
 
Jay_S's Avatar
 
Join Date: Sep 2006
Posts: 354
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
Even the lowly RX-V365 receiver has coax and optical SPDIF inputs - do you need to send audio over hdmi? It might be easier to just run a 2nd cable from the PC to your receiver.

I currently own 2 fanless 9500GT cards. This is the 512MB version. I also own a 1GB version - it happened to be on sale when I was shopping. Both have SPDIF inputs on the PCB. Doesn't much matter though, as my linux box's motherboard does't have an SPDIF header!

But, these fanless Sparkle cards go on sale pretty regularly, and are (obviously) completely silent. And, with 32 sp's, they're OK for light gaming. I believe the G98 chip 8400GS has only 8 sp's, which aside from precluding it from any 3D gaming, is probably insufficient for advanced deinterlacing (you mentioned 1080i TV) and other post processing, which I believe is bound by shader power and memory bandwidth.

I don't have any VC-1 encoded content, but as I understand ONLY the nvidia 8xxx IGP, 9xxx IGP and the G98 chip 8400GS supports 100% VC-1 offload. Although a recent driver/VDPAU update supposedly brings partial VC-1 accel to additional cards. I have yet to test this.
Jay_S is offline  
Old 03-25-2009, 04:08 PM
 
mythmaster's Avatar
 
Join Date: Mar 2008
Location: 255.255.255.255
Posts: 2,142
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
Is your wife really gonna let you get away with having those big cases all over the place?
mythmaster is offline  
Old 03-25-2009, 05:46 PM
Rgb
AVS Special Member
 
Rgb's Avatar
 
Join Date: Apr 2000
Location: SE Michigan
Posts: 6,893
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 10 Post(s)
Liked: 19
Rgb is offline  
Old 03-25-2009, 05:49 PM
Rgb
AVS Special Member
 
Rgb's Avatar
 
Join Date: Apr 2000
Location: SE Michigan
Posts: 6,893
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 10 Post(s)
Liked: 19
Quote:
Originally Posted by Jay_S View Post

Even the lowly RX-V365 receiver has coax and optical SPDIF inputs - do you need to send audio over hdmi? It might be easier to just run a 2nd cable from the PC to your receiver.

I currently own 2 fanless 9500GT cards. This is the 512MB version. I also own a 1GB version - it happened to be on sale when I was shopping. Both have SPDIF inputs on the PCB. Doesn't much matter though, as my linux box's motherboard does't have an SPDIF header!
.

Just curious- when a video card has HDMI out and an internal SPDIF input connection for the motherboard, does the video card combine the SPDIF with HDMI 100% in hardware- i.e no special video or audio driver update needed to output the audio over HDMI?
Rgb is offline  
Old 03-25-2009, 06:05 PM
 
mythmaster's Avatar
 
Join Date: Mar 2008
Location: 255.255.255.255
Posts: 2,142
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
Quote:
Originally Posted by Rgb View Post

Plenty of cases not much larger (or smaller than) than receivers-

http://3btech.net/ch70misuslmi.html

http://3btech.net/sipomiatxca2.html

http://www.newegg.com/Product/Produc...82E16811144231

Well, what I was kind of getting around to is if he was planning on spending $$ on cases, too, it might be about the same $$ to get an msi wind or wait for the ion. Although, I don't know about 8 chan LPCM on those; but, then again, finding a chip that does that (if any) is really the question of the day.
mythmaster is offline  
Old 03-25-2009, 06:08 PM
Senior Member
 
Jay_S's Avatar
 
Join Date: Sep 2006
Posts: 354
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
Quote:
Originally Posted by Rgb View Post

Just curious- when a video card has HDMI out and an internal SPDIF input connection for the motherboard, does the video card combine the SPDIF with HDMI 100% in hardware- i.e no special video or audio driver update needed to output the audio over HDMI?

When ever I've read about it, it's referred to as SPDIF pass-through, which says to me that as long as the mb's spdif header is "live", it'll work. I can't test it because motherboard doesn't have an internal spdif header. And the machine with my other 9500GT has a coax connector built-in the the rear panel (and is running windows anyway).
Jay_S is offline  
Old 03-27-2009, 01:37 PM - Thread Starter
Advanced Member
 
Kermee's Avatar
 
Join Date: Dec 2000
Location: Mill Creek, WA
Posts: 665
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Liked: 10
Thanks, everyone, for the replies!

Quote:
Originally Posted by Jay_S View Post

Even the lowly RX-V365 receiver has coax and optical SPDIF inputs - do you need to send audio over hdmi? It might be easier to just run a 2nd cable from the PC to your receiver.

That's definitely an option. I'd just want to see if I can just do it with a single cable. But you're right; I could just make a cheap SPDIF bracket for the header on the motherboard and connect it to the receiver. I was just hoping not to lose one of the precious optical & coax digital inputs on the receiver.

Quote:
Originally Posted by Jay_S View Post

But, these fanless Sparkle cards go on sale pretty regularly, and are (obviously) completely silent. And, with 32 sp's, they're OK for light gaming. I believe the G98 chip 8400GS has only 8 sp's, which aside from precluding it from any 3D gaming, is probably insufficient for advanced deinterlacing (you mentioned 1080i TV) and other post processing, which I believe is bound by shader power and memory bandwidth.

Yup! I just missed out on Newegg's Deal of the Day today. They had the Sparkle 9400GT 1GB fanless PCIe for $34.99 shipped. That would of been perfect!

Quote:
Originally Posted by Jay_S View Post

I don't have any VC-1 encoded content, but as I understand ONLY the nvidia 8xxx IGP, 9xxx IGP and the G98 chip 8400GS supports 100% VC-1 offload. Although a recent driver/VDPAU update supposedly brings partial VC-1 accel to additional cards. I have yet to test this.

I have some VC-1 encoded content (mainly the IMAX stuff I've ripped from Blu-Ray's). I'll just keep my eye out for G98-based fanless video cards.

Quote:
Originally Posted by mythmaster View Post

Is your wife really gonna let you get away with having those big cases all over the place?

Good question! I'm trying to make the front-end machines as quiet as possible without generating a bunch of heat. Any HTPC, sans the upcoming nVidia ION platform, is going to be larger, heavier, louder than a Popcorn Hour. That's why in the process I wanted to be able to use HDMI connections only between each component so to keep one less cable to string if I decide to hide the components in a ventilated area away from the display device and seating area and run an IR extender/repeater.

Quote:
Originally Posted by mythmaster View Post

Well, what I was kind of getting around to is if he was planning on spending $$ on cases, too, it might be about the same $$ to get an msi wind or wait for the ion. Although, I don't know about 8 chan LPCM on those; but, then again, finding a chip that does that (if any) is really the question of the day.

I have an MSI Wind PC (Atom N270-based one; First Gen) which is a basic Windows XP workstation. It's extremely quiet and doesn't output much heat at all. Just the lack of even a PCI-slot kills it for an HTPC. Atom N270 is plenty of power when VDPAU is in play. I have an ASUS N10J-A1 corporate netbook I use which has an nVidia Geforce 9300M GS chipset with HDMI out and playing nominal Blu-Ray 1080P bitrate video with LPCM coming out of the HDMI port just fine. No stutter at all.

Quote:
Originally Posted by Jay_S View Post

When ever I've read about it, it's referred to as SPDIF pass-through, which says to me that as long as the mb's spdif header is "live", it'll work. I can't test it because motherboard doesn't have an internal spdif header. And the machine with my other 9500GT has a coax connector built-in the the rear panel (and is running windows anyway).

This is exactly how I understand it too. It's just SPDIF "pass-through". Which means no DolbyHD, no DTS-HD MA, no LPCM 8-channel (but PCM Stereo is fine). This is the "loss" I get from not going with an IGP solution but with boards running around $120 (for Intel CPU, Geforce 9xxx IGP;s), (*4) versus $35 (*4), saving about $320 USD and not having the above capabilities... $320 is a nice chunk of change.

Thanks, again, everyone for your help! Just an update for where I'm at now, I have an MSI dual-slot 9600GT (which just happens to have the SPDIF-in) which passes through the SDPIF to the first DVI port on the card. It came with a DVI-to-HDMI adapter so I'm going to use this box as a test box to install Ubuntu 8.10 to an iSCSI target on my 6TB RAID server via GbE to make it diskless. Wish me luck!

Cheers,
Kermee... who likes to over-engineer things.

Cheers, Kermee
Kermee is offline  
Old 03-27-2009, 02:17 PM
Senior Member
 
Jay_S's Avatar
 
Join Date: Sep 2006
Posts: 354
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
Quote:
Originally Posted by Kermee View Post

I just missed out on Newegg's Deal of the Day today. They had the Sparkle 9400GT 1GB fanless PCIe for $34.99 shipped. That would of been perfect!

Watch out for those 9400GT's. Per this Missing Remote article, they don't have enough grunt for advanced deinterlacing and other post processing. Wait for the 9500GT if you can.

Your 9600 sounds perfect - keep us posted on your progress.

I'm really surprised that the 8x00/9x00 IGP motherboards haven't dropped in price at all.
Jay_S is offline  
Old 03-27-2009, 05:05 PM
 
mythmaster's Avatar
 
Join Date: Mar 2008
Location: 255.255.255.255
Posts: 2,142
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
Just to clarify -- are you saying that you're getting 8 chan LPCM HDMI from your 9300M GS netbook or just stereo?

Also, what are you using for iSCSI target? I've been looking real hard at COMSTAR because I think ZFS is impressive.
mythmaster is offline  
 
Thread Tools


Forum Jump: 

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off