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Soundcard digital pathways?, If you skip the DAC are they 'perfect'?
puntloos
post Jul 28 2003, 13:27
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I was wondering,

If you use a soundcard's digital out and tell it not to equalize/eax/otherprocessing, is the digital quality 'perfect'?

Case in point I have a professional DSP hooked up to my SB audigy's digital out. If I were to upgrade the audigy (not that I have the $$$ but for argument's sake wink.gif ), would I get any improvement in the sound quality of my mpc audio playback?

Basically I hear some 'stories' from people that say 'yes' to the last question but I find it hard to believe that the digital ".wav" data from winamp would get distorted by the sound card that's hooked up to it. provided of course I don't use the onboard DAC's or some hardware DSP feature like resampling or spatialisation crap, but Im telling my computer to have all EQ's off and just play back the file.

Anyone know the answer here?
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odyssey
post Oct 7 2006, 12:50
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QUOTE (coburn_c @ Oct 6 2006, 15:55) *
QUOTE (odyssey @ Oct 6 2006, 03:13) *

QUOTE (coburn_c @ Oct 6 2006, 03:29) *

On my X-fi, in "audio creation mode" it allows you to set the clock to 44.1Khz. Now I'm not sure what effect this has, but it sure doesn't change the output. The card can only output 48Khz and 96Khz, and it resamples every bit of it. This does have the plus side that analog content is sent out over stereo pcm.. but has the downside of turning 44.1KHz DTS content into.. crap.

It's still resampled. You need to check "Bit matched playback" which greys out the field you can specify samplerate.

I figured that foobar sends this correctly and should be bit identical.



Well, for one, enabling bit matched playback does NOT grey out the samplerate field, nor does it enable bit matched playback. My DTS audio CDs still come out resampled to 48KHz and sounding like crap on a stick(terrible distortion). Creative's website even states the it only supports recording of 44.1KHz, not output.

Not that I'm shocked or anything, Creative Sucks.

Edit: OK.. with bit matched playback and the sample rate set to 44.1KHz it does indeed put out a 44.1KHz signal... after it converts it to 48KHz and back..

Edit#2: Kernel streaming works.. *clap*

Bitmatching playback will not disallow other streams - Like I said, i had problems activating it with Winamp, but foobar2000 works out of the box (no kernel streaming)

QUOTE (CSMR @ Oct 7 2006, 04:03) *
You will not get bit perfect playback unless there is a dedicated connection between the application and the sound card; for example ASIO or kernel streaming. Otherwise the sound has to be mixed which entails volume reduction.

Everything sent to ADPCM (well that's what Creative said, but I thought that was a CODEC) will be bitmatched.


--------------------
Can't wait for a HD-AAC encoder :P
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Posts in this topic
- puntloos   Soundcard digital pathways?   Jul 28 2003, 13:27
- - AstralStorm   Digital should be, well, bit identical. But.., Som...   Jul 28 2003, 13:36
- - jrbamford   then there is the kmixer and other filters that wi...   Jul 28 2003, 14:02
- - Pio2001   It's very difficult to get a perfect digital p...   Jul 28 2003, 21:04
- - Patsoe   QUOTE (Pio2001 @ Jul 28 2003, 09:04 PM)It...   Jul 28 2003, 21:23
- - puntloos   QUOTE (Pio2001 @ Jul 28 2003, 12:04 PM)It...   Jul 28 2003, 22:48
- - jrbamford   apparently somewhere on avsforum there is a techni...   Jul 28 2003, 22:55
- - AstralStorm   Bypassing kmixer is possible with DirectSound. The...   Jul 28 2003, 23:06
- - Patsoe   @jrbamford: I was re-reading the link I provided, ...   Jul 28 2003, 23:40
- - puntloos   Indeed. I noticed that too. Im already registrin...   Jul 28 2003, 23:58
- - jrbamford   puntloos.. if you can afford possible reinstall i...   Jul 29 2003, 00:09
- - AstralStorm   Sorry, even setting latency to 512samples/sec (max...   Jul 29 2003, 03:32
- - puntloos   It would be cool if you could switch between the t...   Jul 29 2003, 03:37
- - dgover2   QUOTE Bypassing kmixer is possible with DirectSoun...   Jul 29 2003, 04:57
- - Halcyon   Let me try and summarise (please correct if I...   Jul 29 2003, 07:55
- - KikeG   Waveout is bit-perfect on Win9X, given that the mi...   Jul 29 2003, 08:58
|- - puntloos   Bump! (hah.. 3 year old topic..) Guys, Im S...   Aug 7 2006, 13:46
|- - probedb   QUOTE (puntloos @ Aug 7 2006, 13:46) Wha...   Aug 7 2006, 15:26
- - CSMR   What are you doing with Quad speakers and an Audig...   Aug 7 2006, 14:45
- - odyssey   QUOTE (puntloos @ Aug 7 2006, 14:46) add:...   Aug 7 2006, 15:06
- - Axon   BTW, I have an RME DIGI96/8 PAD, and I can attest ...   Aug 7 2006, 15:28
|- - puntloos   QUOTE (odyssey @ Aug 7 2006, 06:06) Am I ...   Aug 7 2006, 15:45
|- - puntloos   Plus oh yeah the terratec DMX6fire isn't being...   Aug 7 2006, 15:56
|- - puntloos   krt. leave it to creative to be extra-super-fuzzy ...   Aug 7 2006, 18:25
|- - Night Rain   Never mind. Didn't see the post above.   Aug 8 2006, 12:59
- - CSMR   I think all so-called professional or semi-profess...   Aug 7 2006, 15:48
- - probedb   Did everyone just ignore me? I mentioned a $2...   Aug 7 2006, 16:06
|- - puntloos   QUOTE (probedb @ Aug 7 2006, 07:06) Did e...   Aug 7 2006, 16:15
- - odyssey   QUOTE (puntloos @ Aug 7 2006, 16:45) QUOT...   Aug 7 2006, 16:34
|- - puntloos   QUOTE (odyssey @ Aug 7 2006, 07:34) QUOTE...   Aug 7 2006, 17:38
- - Rotareneg   Creative X-Fi cards let you select the master cloc...   Aug 7 2006, 17:43
|- - puntloos   QUOTE (Rotareneg @ Aug 7 2006, 08:43) Cre...   Aug 7 2006, 18:13
- - HotshotGG   QUOTE Now all I need to do is find out 'for su...   Aug 7 2006, 18:42
|- - puntloos   QUOTE (HotshotGG @ Aug 7 2006, 09:42) QUO...   Aug 7 2006, 18:55
- - CSMR   QUOTE (puntloos @ Aug 7 2006, 06:56) Well...   Aug 7 2006, 19:04
|- - puntloos   QUOTE (CSMR @ Aug 7 2006, 10:04) QUOTE I ...   Aug 7 2006, 22:30
|- - master   QUOTE (puntloos @ Aug 7 2006, 13:30) Sadl...   Aug 15 2006, 23:09
|- - puntloos   QUOTE (master @ Aug 15 2006, 14:09) If my...   Aug 21 2006, 15:39
- - Patsoe   Actually, I think there is officially no such thin...   Aug 7 2006, 23:16
|- - puntloos   QUOTE (Patsoe @ Aug 7 2006, 14:16) Actual...   Aug 8 2006, 00:25
- - odyssey   QUOTE (puntloos @ Aug 7 2006, 19:25) For ...   Aug 8 2006, 11:36
- - jvs   @puntloos: Why don't you buy an ESI Juli@? Thi...   Aug 14 2006, 23:20
- - Sebastian Mares   I am somewhat confused now - Pio said that Hercule...   Aug 15 2006, 23:49
- - Patsoe   QUOTE (Sebastian Mares @ Aug 15 2006, 23...   Aug 16 2006, 00:04
- - Sebastian Mares   Ah, right. Didn't they use Cirrus Logic back t...   Aug 16 2006, 00:23
- - odyssey   QUOTE (Rotareneg @ Aug 7 2006, 18:43) Cre...   Aug 22 2006, 21:32
- - puntloos   Well I've bought the M-Audio Revolution 5.1. ...   Aug 23 2006, 10:33
- - 2Bdecided   You know all this bitperfect stuff? While I agree...   Aug 23 2006, 11:14
- - puntloos   I have to make one admission here.. my DAC is the ...   Aug 23 2006, 11:33
- - cabbagerat   QUOTE (2Bdecided @ Aug 23 2006, 02:14) If...   Aug 23 2006, 13:10
|- - 2Bdecided   QUOTE (cabbagerat @ Aug 23 2006, 13:10) O...   Aug 23 2006, 13:49
|- - puntloos   QUOTE (2Bdecided @ Aug 23 2006, 04:49) QU...   Aug 23 2006, 16:46
||- - Patsoe   QUOTE (puntloos @ Aug 23 2006, 16:46) ......   Aug 23 2006, 17:03
||- - puntloos   QUOTE (Patsoe @ Aug 23 2006, 08:03) QUOTE...   Aug 23 2006, 17:21
|- - puntloos   QUOTE (2Bdecided @ Aug 23 2006, 04:49) If...   Aug 23 2006, 18:16
|- - Patsoe   QUOTE (puntloos @ Aug 23 2006, 18:16) Her...   Aug 23 2006, 18:32
|- - puntloos   QUOTE (Patsoe @ Aug 23 2006, 09:32) QUOTE...   Aug 23 2006, 19:22
|- - 2Bdecided   QUOTE (puntloos @ Aug 23 2006, 19:22) QUO...   Aug 24 2006, 13:42
- - odyssey   QUOTE (odyssey @ Aug 22 2006, 22:32) QUOT...   Aug 31 2006, 21:14
- - coburn_c   On my X-fi, in "audio creation mode" it ...   Oct 6 2006, 02:29
- - odyssey   QUOTE (coburn_c @ Oct 6 2006, 03:29) On m...   Oct 6 2006, 09:13
|- - coburn_c   QUOTE (odyssey @ Oct 6 2006, 03:13) QUOTE...   Oct 6 2006, 14:55
- - CSMR   You will not get bit perfect playback unless there...   Oct 7 2006, 03:03
- - odyssey   QUOTE (coburn_c @ Oct 6 2006, 15:55) QUOT...   Oct 7 2006, 12:50
- - CSMR   What you have just said would imply that bitmatche...   Oct 7 2006, 15:51
|- - odyssey   QUOTE (CSMR @ Oct 7 2006, 16:51) What you...   Oct 7 2006, 16:18
- - CSMR   Then what happens if you have a bit-perfect stream...   Oct 7 2006, 17:44
|- - coburn_c   QUOTE (CSMR @ Oct 7 2006, 11:44) Then wha...   Oct 7 2006, 18:32
- - CSMR   (Which is that is not compatible with what odyssey...   Oct 8 2006, 01:58
- - odyssey   QUOTE (CSMR @ Oct 7 2006, 18:44) Then wha...   Oct 8 2006, 16:29
|- - coburn_c   QUOTE (odyssey @ Oct 8 2006, 10:29) Just ...   Oct 9 2006, 00:26
|- - odyssey   QUOTE (coburn_c @ Oct 9 2006, 01:26) I...   Oct 9 2006, 14:26
- - coburn_c   What about this card?   Oct 10 2006, 04:38
- - Marvin77   Hmm, interesting. I found this review http://ww...   Oct 10 2006, 18:46
|- - coburn_c   That review was kind of crappy.. but those cpu uti...   Oct 10 2006, 22:57
- - MartinO2   I just wonder, what kind of resampling method is ...   May 2 2007, 11:52
|- - eevan   QUOTE (MartinO2 @ May 2 2007, 12:52) I ju...   May 2 2007, 13:05
- - IndieRockSteve   So is it possible to tell if a soundcard is borkin...   May 22 2007, 15:03


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