SPDIF and sound card question - diyAudio
Go Back   Home > Forums > Source & Line > Digital Source

Digital Source Digital Players and Recorders: CD , SACD , Tape, Memory Card, etc.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 28th January 2008, 03:13 PM   #1
diyAudio Member
 
Join Date: Jan 2008
Question SPDIF and sound card question

Hi,

I am new to the whole DIY audio thing and have a few questions. I have a creative x-fi sound card with an SPDIF output. One question that I have is, does that output contain the signal for all 7.1 channels? Also, can it be made to work at 24 bit and 96khz with all channels? Does this output contain all of the processing that that the analog outputs would normally have (such as 24 bit crystallizer and such), or is it output before that point?

Thanks for any info.
  Reply With Quote
Old 28th January 2008, 03:24 PM   #2
pjp is offline pjp  India
diyAudio Member
 
pjp's Avatar
 
Join Date: Nov 2006
Location: under the rainclouds
http://en.wikipedia.org/wiki/S/PDIF#...specifications

http://en.wikipedia.org/wiki/AES/EBU#The_Protocol
  Reply With Quote
Old 28th January 2008, 08:32 PM   #3
diyAudio Member
 
Join Date: Jan 2008
Thanks for the links. I didn't think to look up AES/EBU for more information.

So, it seems like it is limited to 2 channels and is either 20 or 24 bit. Is there a way to get a digital output for all 7.1 channels from a sound card like this? It doesn't have to be SPDIF necessarily.
  Reply With Quote
Old 30th January 2008, 02:18 PM   #4
JinMTVT is offline JinMTVT  Canada
diyAudio Member
 
Join Date: Jul 2004
Location: MTL
and i thought that digital output from computer cars
could carry the surround info..

i am pretty sure that i have seen many times
text about output of multiple channel output from digital
sound cards ???
  Reply With Quote
Old 30th January 2008, 06:25 PM   #5
diyAudio Member
 
Join Date: Jan 2008
I guess what I really meant was that it doesn't carry any more than 2 channels of uncompressed PCM data. It looks like you can get 5.1 (is 7.1 possible?) pass through on a digital connection but that is still encoded as Dolby Digital or DTS if I am understanding what I have read correctly.

What I was looking for a was uncompressed audio. The only interface that I could find that I liked that could do that is MADI (32 channels at 96k). ADAT lightpipe can also carry 8 channels but only at 48k and I was hoping for 96 or 192. In any case, both of those interfaces are found only on high end equipment (that I have seen anyways) and I don't know how I would go about actually retrieving the individual channel data from the stream anyways.

I still haven't really found a solution to what I'm trying to do. I'll probably make a post later that explains what that is and see if anyone has any ideas about how to implement it. If 8 channels of PCM 96k were available directly from the sound card, it would make what I was trying to do a lot easier.

In the mean time, if anyone has any information on low cost computer cards that support MADI or 7.1 channel PCM over SPDIF or AES, I would appreciate any information. Also, any info on "DIY possible" Dolby Digital or DTS decoding would be nice as well as info on MADI transmit/receive ICs if any exist.
  Reply With Quote
Old 30th January 2008, 08:58 PM   #6
JinMTVT is offline JinMTVT  Canada
diyAudio Member
 
Join Date: Jul 2004
Location: MTL
ah!!
that is better..u were suddently ruining all my plans
aahahah

good luck finding the right product for u then
  Reply With Quote
Old 5th February 2008, 03:23 AM   #7
pjp is offline pjp  India
diyAudio Member
 
pjp's Avatar
 
Join Date: Nov 2006
Location: under the rainclouds
So what is it you were trying to do ?
  Reply With Quote
Old 5th February 2008, 05:11 AM   #8
diyAudio Member
 
Join Date: Jan 2008
I have made a much more detailed post of what I was thinking here:

7.1 digital speaker idea
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
SPDIF in analog sound card sundeep83 Digital Source 1 29th May 2008 06:54 PM
cdrom spdif quality / sound card spdif metebalci Digital Source 0 2nd September 2006 07:16 PM
Spdif sound card lndm Digital Source 5 27th April 2006 02:44 PM
cheap SPDIF-out sound card for music, movies, and gaming? Dartagnan Digital Source 7 11th October 2004 03:15 PM


New To Site? Need Help?

All times are GMT. The time now is 02:35 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2