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Windows XP k mixer vs. whatever is in Vista
audiophilosophy
post Feb 3 2007, 22:02
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I'm a noob with this technical sort of stuff, but I was wondering if the audio processing stuff included in Vista is better or worse than what we had with XP.

Ok, since I am a noob, this is what I have gathered about XP's audio processing--- the k mixer is bad, and it has a degrading effect on the sound unless you decided to take steps to entirely bypass the k mixer. Correct me if I'm wrong about this.

So I'm wondering, are there any improvements over XP's k mixer with what comes standard with Vista?
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AndyH-ha
post Feb 4 2007, 01:27
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QUOTE
so obviously kmixer changes digital stream in some way
But the change that quashes DTS doesn't have t9o be great enough to be perceived with regular stereo material.
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Dogbert
post Feb 4 2007, 01:46
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QUOTE (AndyH-ha @ Feb 4 2007, 01:27) *
QUOTE
so obviously kmixer changes digital stream in some way
But the change that quashes DTS doesn't have t9o be great enough to be perceived with regular stereo material.


Contrary to popular belief, the kmixer of XP and 2k doesn't change a thing when you move the wave volume slider to the max. DTS encoded wave files can be played through WaveOut/DSound and through the kernel mixer without any loss.

And I should know, I've developed a driver for the C-Media 8738/8768 which just can do that stunt.

The mixing engine of Vista works with 32bit float samples, so there's actually some information lost in the conversion. But there is a so called "exclusive mode" which is available through the WASAPI. It should give you bitperfect output, albeit I haven't seen software which actually support it (yet).


--------------------
http://code.google.com/p/cmediadrivers
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crni
post Feb 4 2007, 10:07
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QUOTE (Dogbert @ Feb 3 2007, 16:46) *
Contrary to popular belief, the kmixer of XP and 2k doesn't change a thing when you move the wave volume slider to the max. DTS encoded wave files can be played through WaveOut/DSound and through the kernel mixer without any loss.

Unfortunately that is not case with my card, even with volume slider(s) maxed out in mixer when using DSound in foobar receiver doesn't pick up DTS signal. It briefly switches to DTS but apparently signal is 'week' and receiver reverts back to hissing instantly so IMHO 'contrary to popular belief' kmixer does change signal. It's true that it doesn't effects PCM 44.1 signal but it surely 'destroys' DTS 44.1 stream (at least im my case).
ONLY way I can get unchanged DTS signal to my receiver is when bypassing kmixer via ASIO or KS plugin.
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Posts in this topic
- audiophilosophy   Windows XP k mixer vs. whatever is in Vista   Feb 3 2007, 22:02
- - Martin H   I don't know what changes Vista includes with ...   Feb 3 2007, 22:53
- - crni   Maybe you can explain something to me... I have M-...   Feb 3 2007, 23:25
- - Tripwire   Vista uses a floating point pipeline in their audi...   Feb 3 2007, 23:36
- - AndyH-ha   QUOTE so obviously kmixer changes digital stream i...   Feb 4 2007, 01:27
|- - Dogbert   QUOTE (AndyH-ha @ Feb 4 2007, 01:27)...   Feb 4 2007, 01:46
|- - audiophilosophy   QUOTE (Dogbert @ Feb 3 2007, 18:46) QUOTE...   Feb 4 2007, 01:50
|- - crni   QUOTE (Dogbert @ Feb 3 2007, 16:46) Contr...   Feb 4 2007, 10:07
|- - Dogbert   QUOTE (crni @ Feb 4 2007, 10:07) ONLY way...   Feb 4 2007, 11:07
|- - Martin H   For anyone interessted in this bit-mangling issue ...   Feb 4 2007, 11:52
|- - audiophilosophy   QUOTE But like I said, it is impossible (or I have...   Feb 4 2007, 17:07
|- - Dogbert   QUOTE (audiophilosophy @ Feb 4 2007, 17:0...   Feb 4 2007, 17:28
- - HotshotGG   QUOTE So are you saying that the audio quality tha...   Feb 4 2007, 05:44
|- - audiophilosophy   QUOTE (HotshotGG @ Feb 3 2007, 22:44) QUO...   Feb 4 2007, 16:43
|- - Jebus   QUOTE (HotshotGG @ Feb 3 2007, 21:44) The...   Feb 4 2007, 19:23
|- - Dogbert   QUOTE (Jebus @ Feb 4 2007, 19:23) Vista l...   Feb 4 2007, 19:48
- - sld   Foobar2000 with KS works in Vista. I was using an...   Feb 4 2007, 07:09
- - mugen   How do I get KS working in Vista? With a Realtek ...   Feb 4 2007, 09:08
|- - sld   QUOTE (mugen @ Feb 4 2007, 16:08) How do ...   Feb 5 2007, 19:36
- - Dogbert   The kernel mixer of the 64 bit version of Windows ...   Feb 4 2007, 18:29
- - Borisz   I can use Kernel Streaming in Vista, using a Sound...   Feb 4 2007, 18:52
- - TREX6662k6   Actually you are able to disable driver signing by...   Feb 4 2007, 19:52
|- - Dogbert   QUOTE (TREX6662k6 @ Feb 4 2007, 19:52) Ac...   Feb 4 2007, 19:56
- - TREX6662k6   I agree with A) but B) there is a command you can ...   Feb 4 2007, 20:04
- - HotshotGG   QUOTE Well, sidetracking successful. What the hell...   Feb 4 2007, 20:22
- - Firon   Jebus: HD DVD works just fine on XP. So does Blu-R...   Feb 4 2007, 20:27
|- - Jebus   QUOTE (Firon @ Feb 4 2007, 12:27) Jebus: ...   Feb 4 2007, 20:40
|- - rjamorim   QUOTE (Jebus @ Feb 4 2007, 16:40) And no,...   Feb 5 2007, 01:39
|- - chelgrian   QUOTE (rjamorim @ Feb 5 2007, 01:39) I se...   Feb 5 2007, 21:02
|- - rjamorim   QUOTE (chelgrian @ Feb 5 2007, 17:02) QUO...   Feb 6 2007, 01:39
- - bidz   The DRM system in Vista is only active if you play...   Feb 4 2007, 20:40
|- - Dogbert   QUOTE (bidz @ Feb 4 2007, 20:40) The DRM ...   Feb 4 2007, 20:47
||- - bidz   QUOTE (Dogbert @ Feb 4 2007, 11:47) In Wi...   Feb 4 2007, 20:56
||- - Dogbert   QUOTE (bidz @ Feb 4 2007, 20:56) That...   Feb 4 2007, 21:48
||- - jeffster   QUOTE (bidz @ Feb 5 2007, 07:56) The DRM ...   Feb 5 2007, 15:43
|- - spockep   QUOTE (bidz @ Feb 4 2007, 15:40) The DRM ...   Feb 5 2007, 18:28
- - CSMR   QUOTE (spockep @ Feb 5 2007, 09:28) Thats...   Feb 5 2007, 20:38
|- - Dogbert   QUOTE (CSMR @ Feb 5 2007, 20:38) No. Wind...   Feb 5 2007, 20:48
- - JunkieXL   QUOTE (jeffster @ Feb 5 2007, 07:43) Kind...   Feb 5 2007, 21:05
- - Martin H   Hi Dogbert Are you saying that the person who wr...   Feb 5 2007, 22:48
- - CSMR   QUOTE (Dogbert @ Feb 5 2007, 11:48) Ahh, ...   Feb 5 2007, 22:52
|- - Dogbert   QUOTE (CSMR @ Feb 5 2007, 22:52) So what ...   Feb 5 2007, 23:08
- - CSMR   Yes and when they are mixed together, is the volum...   Feb 5 2007, 23:21
|- - Dogbert   QUOTE (CSMR @ Feb 5 2007, 23:21) Yes and ...   Feb 5 2007, 23:50
- - tgoose   Is it really illegal to watch DVDs using OSS? I wa...   Feb 7 2007, 00:25


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