Geekzone: technology news, blogs, forums
Guest
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.


View this topic in a long page with up to 500 replies per page Create new topic
1 | 2 | 3 
tkr001
416 posts

Ultimate Geek
+1 received by user: 69


  #348234 5-Jul-2010 23:03
Send private message

richms: Jitter is one of the biggest cons in the audio world. Mattered in the old days where things didnt reclock things like on the very first CD players, as soon as there was oversampling in DA converters it would either lock onto the clock with its PLL or not, any jitter bad enough to make a PLL lose lock would indicate that there was something broken in the source material.

Even when there is jitter, the resulting noise from a sample being latched a few nanoseconds earlier or later will be immaterial.

PC motherboards are able to push signals around them with clock speeds faster than the claimed measurable jitter change between audiophools with their overpriced digital cables.

Besides. If there is any DSP being done on the data it necessitates having a buffer in the AVR so the jitter is totally removed before it hits its DACs


There is no point in continuing this. Needless to say I think you spout rubbish on this topic and you likewise ramble on about audiophools and overpriced digital cables.



richms
29104 posts

Uber Geek
+1 received by user: 10217

Trusted
Lifetime subscriber

  #348237 5-Jul-2010 23:13
Send private message

That's the usual answer from an audiophool who cant find the science to justify their purchases.

When you can show some double blind trials with a statistically significant bias towards music on a player vs the same music played losslessly out a PC SPDIF then you may have a point. Funny thing is the only people who can tell are those running the tests or panelists who are aware of what they are hearing in the ones I have looked at.




Richard rich.ms

geekiegeek
2513 posts

Uber Geek
+1 received by user: 625
Inactive user


  #348263 6-Jul-2010 06:01
Send private message

Back on topic.

I would try different PC based players i.e. foobar as mentioned. Even playing through foobar vs itunes vs bass vs WMP will give different sound results. Personally I dont think you will get an exact match as both the Blu-ray player and the HTPC have to convert the music file to PCM (I think) in order to play it via the SPDIF so there is going to be software quirks involved.

Thats my understanding anyways.



buzzy
217 posts

Master Geek
+1 received by user: 2


  #348296 6-Jul-2010 09:31
Send private message

tkr001: One word, jitter


Weren't you advocating sending the signal via SPDIF to an external DAC earlier?

Let's have a bit of a reality check here. Whether or not jitter is real phenomenon, it's unlikely to be responsible for the behaviour that Gumdigger's experiencing. Even a fairly supportive article (http://www.audiocraftersguild.com/AandE/npt.on.jitter2.htm) says that "The threshold of audibility of these effects is a matter of considerable controversy"
 
I'd interpreted your earlier comments to mean that the DAC and amp inside an AVR won't produce hi-fi quality sound, even if the source is transmitted to the AVR digitally. Personally, I find that a Yamaha RX-V665 AVR and a pair of mirage Omni-150s sounds bloody good to me. I'm not convinced that spending thousands on a dedicated two-channel amp would produce a much better sound than the Yammy.  

richms
29104 posts

Uber Geek
+1 received by user: 10217

Trusted
Lifetime subscriber

  #348468 6-Jul-2010 17:02
Send private message

geekiegeek: Back on topic.

I would try different PC based players i.e. foobar as mentioned. Even playing through foobar vs itunes vs bass vs WMP will give different sound results. Personally I dont think you will get an exact match as both the Blu-ray player and the HTPC have to convert the music file to PCM (I think) in order to play it via the SPDIF so there is going to be software quirks involved.

Thats my understanding anyways.


The only way to be sure is to bypass the windows mixer with wasapi or asio output, flac should decode the same no matter the decoder, and as it decodes to integer there is no worry of varying dither routines being applied to it.

UNLESS - it is going thru a sample rate conversion. The conversion in XP had a slider to change the quality, and the lowest settings were total crap, and some sound hardware that was never made for the job (old audigys) did a lousy job of it as well. In those cases a marked improvement can be had by using a better converter in the player software to take it to 48 or 96 or whatever your soundcards fixed rate is. windows 7 seems a lot better with its rate conversions, and you can usually set the soundcard to 44.1 in anycase.





Richard rich.ms

1 | 2 | 3 
View this topic in a long page with up to 500 replies per page Create new topic








Geekzone Live »

Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.



Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.