Really!? - no decent diy DAC with basic 5.1/PCM functionality as well? - diyAudio
Go Back   Home > Forums > Source & Line > Digital Line Level

Digital Line Level DACs, Digital Crossovers, Equalizers, 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 3rd June 2010, 02:06 PM   #1
Galgo is offline Galgo  Israel
diyAudio Member
 
Join Date: Mar 2010
Location: Jerusalem
Default Really!? - no decent diy DAC with basic 5.1/PCM functionality as well?

Hello again,
After I screened through many threads and discussions -and even open few myself on the matter - I still couldn't find an elegant solution that will enable me to get excellent Stereo DAC performances and at least basic multichannel support - either decoding AC3/DD/DTS independently or at least able to process PCM signals after being decoded by the computer.

I'm looking for something to improve my HTPC built-in sound codec (ADI AD1986a - 5.1 20bit/48MHz DACs) that'll will get USB/SPDIF and output 6 analog channels within the 100-150$ range.

I'd settle for decent 24bit/96Mhz solution and the multichannel sound doesn't have to be "audiophile" quality.

I couldn't find any diy kit such as the many 2CH DACs out there and the only solution seem to be:

1) Using a used/outdated DD/DTS A/V receiver/processor - bulky and not very attractive solution... Also Stereo decoding may not be good enough.

2) Going for external sound card with 5.1 support - i.e. Creative Sound Blaster X-Fi External USB - Not sure if it's stereo DAC is really superior and I'm not really into creative - would someone comment regarding it's performance?

3) Using one of the external DTS/DD decoders found all over eBay, feed them from the on board SPDIF and modify if possible some of their internals - such as the models I linked here: Upgrading a "mocha JY-M2" multi channel DAC? - again, I'm afraid their Stereo DAC performance aren't comparable to even the basic 2CH diy DAC boards out there...

So what would you suggest?
IS there any way to stream 2ch contents through a decent DAC to the front L/R and when multichannel content is played - feed the other channels through the onboard analog output (while the front channels are still processed through the better separated DAC?)

Gal
  Reply With Quote
Old 3rd June 2010, 02:43 PM   #2
wwenze is offline wwenze  Singapore
diyAudio Member
 
Join Date: Mar 2008
Quote:
Originally Posted by Galgo View Post
IS there any way to stream 2ch contents through a decent DAC to the front L/R and when multichannel content is played - feed the other channels through the onboard analog output (while the front channels are still processed through the better separated DAC?)

Gal
All sound cards can do that. Actually most still play through all analogue outputs including front L/R by default even if you enabled digital out.

Oh ya, select PCM instead of Dolby Digital Live.

Last edited by wwenze; 3rd June 2010 at 02:46 PM.
  Reply With Quote
Old 3rd June 2010, 03:06 PM   #3
Galgo is offline Galgo  Israel
diyAudio Member
 
Join Date: Mar 2010
Location: Jerusalem
I already have an on board sound that do that and has 6 analog channel output...
But I want something better - at least for Stereo music...

A discrete internal sound card (Asus Xonar etc..) is not an attractive solution for me - I don't have room for it (slim case) and believe even a half decent diy DAC could perform much better outside the PC -
I'd like something EXTERNAL (less noise) with superior Stereo sound - this is the highest priority and I'll settle for just basic multi channel output as long as the Front two channels are getting the highest quality I can get (at budget).

If I'll find a way to utilize the internal sound for decoding multi channel content (AC3/DTS/DD...) and feed only the Front channels through the better external DAC while the rest (Center, Subwoofer, Surround L/R) go through it's built in analog out (like I'm using it now) - it'll completely satisfy me - anyone knows if it's feasible and how to do it?

Gal

Gal
  Reply With Quote
Old 3rd June 2010, 03:14 PM   #4
wwenze is offline wwenze  Singapore
diyAudio Member
 
Join Date: Mar 2008
On-board sound SPDIF-out -> 2-channel DAC with SPDIF-in

On-board sound analogue-out -> rest of the speakers

By default multi-channel content will be decoded into PCM to be played through analogue outputs and sent over SPDIF in PCM mode. You will need the appropriate software decoders to hear sound through the analogue outputs (and digital outputs in PCM)
  Reply With Quote
Old 3rd June 2010, 03:24 PM   #5
Galgo is offline Galgo  Israel
diyAudio Member
 
Join Date: Mar 2010
Location: Jerusalem
Quote:
Originally Posted by wwenze View Post
On-board sound SPDIF-out -> 2-channel DAC with SPDIF-in

On-board sound analogue-out -> rest of the speakers

By default multi-channel content will be decoded into PCM to be played through analogue outputs and sent over SPDIF in PCM mode. You will need the appropriate software decoders to hear sound through the analogue outputs (and digital outputs in PCM)
Correct - thats exactly what I meant- thank you for the "translation"

Quote:
Originally Posted by wwenze View Post
You will need the appropriate software decoders to hear sound through the analogue outputs (and digital outputs in PCM)
So - any idea how and what piece of software can do it?
Feeding the 2 front channels through the digital SPDIF out while the rest are fed to the analog outputs?

Currently I'm using foobar2000 for audio and vlc/ffdshow codecs for video.
Gal
  Reply With Quote
Old 3rd June 2010, 03:56 PM   #6
wwenze is offline wwenze  Singapore
diyAudio Member
 
Join Date: Mar 2008
Just connect the wires like that.

You might not even need to set any settings other than enabling digital-out as the settings by default are supposed to do that.

As for software required - an AC3 decoder - built-into FFDShow, that's enough.

Last edited by wwenze; 3rd June 2010 at 04:03 PM.
  Reply With Quote
Old 3rd June 2010, 06:08 PM   #7
diyAudio Member
 
stokessd's Avatar
 
Join Date: Nov 2002
Location: Grantham, NH
I think the problem is that 5.1 isn't really exciting for the DIYAudio crowd. At least for me it isn't.

<Rant>
Surround sound is a smokescreen to distract the viewer from realizing that the movie he just paid good money to watch is shallow poorly executed crap.

The picture is in one little spot in front of me, why the hell should the sound be in places where the picture isn't? If the picture is all around me, then the sound should be too, until then, I'll take one or two good speakers behind or flanking the screen thankyouverymuch.

Now, get off my lawn!

</Rant>

Sheldon
  Reply With Quote
Old 4th June 2010, 06:01 AM   #8
qusp is offline qusp  Australia
diyAudio Member
 
qusp's Avatar
 
Join Date: Oct 2009
Location: Brisbane, Australia
I dont think you get out to enough alternative theaters
  Reply With Quote
Old 5th June 2010, 02:10 AM   #9
diyAudio Member
 
Join Date: Jan 2008
Location: Virginia
Quote:
Originally Posted by stokessd View Post
Surround sound is a smokescreen to distract the viewer from realizing that the movie he just paid good money to watch is shallow poorly executed crap.
First try to listen to a real surround, not a movie sound track, then comment on the matter.
There are many great surround DVD-A, SACD albums, all of them with the bands/singer aprovall.
DIY comunity doesn't like surround because... most cannot afford quality surround.
  Reply With Quote
Old 6th June 2010, 06:33 AM   #10
Galgo is offline Galgo  Israel
diyAudio Member
 
Join Date: Mar 2010
Location: Jerusalem
Quote:
Originally Posted by wwenze View Post
Just connect the wires like that.

You might not even need to set any settings other than enabling digital-out as the settings by default are supposed to do that.

As for software required - an AC3 decoder - built-into FFDShow, that's enough.
And do you think it'll output through the analog as well as SPDIF on the same time?

BTW - any decent 2ch DIY DAC you'd recommend?
Gal
  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
Is the PCM-61 Dac are I2S or EIAJ data input ? gaetan8888 Digital Source 2 7th August 2007 05:08 PM
Any ideas to improve this PCM-54K based DAC? Salar Digital Source 5 12th July 2007 10:50 AM
Burr Brown Pcm 65 dac rickpt Digital Source 1 12th June 2006 05:33 PM
Hk Dac Pcm 1704 mfr Digital Source 16 22nd June 2004 07:14 AM


New To Site? Need Help?

All times are GMT. The time now is 09:58 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