Recent content by nick_charles
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Sound Science Corner Pub
I check in periodically but am too busy listening to music or working and seem to keep seeing the same old arguments when I log in, there haven't been any good Jitter threads in ....ages...- nick_charles
- Post #15
- Forum: Sound Science
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Objectivists board room
I have a question for you re checksums but I'll do it via PM , though not sure my students will like being told that TCP is not really reliable after all but it will make for a killer question for their final..- nick_charles
- Post #3,356
- Forum: Sound Science
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Objectivists board room
yep, TCP when you absolutely 100% have to get every bit correct EVENTUALLY but it is generally considered too sloooooooooooooooow for "real-time" applications. I did a quick search and could not find any **canonical** (or reputable) source suggesting that Audio Over Ethernet implements...- nick_charles
- Post #3,354
- Forum: Sound Science
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Objectivists board room
Not Ethernet though, Ethernet is not "reliable" in the strictest sense of the word. If you want guaranteed reliability with Ethernet you have to implement it elsewhere, duff frames just get thrown away, in fairness it is typically much more reliable than 802.11 but not without problems...- nick_charles
- Post #3,332
- Forum: Sound Science
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Understanding Digital and Analog Jitter
People can be wholly honourable and honest (as they see the truth) and still be mistaken. This is not a new concept. People can believe they hear obvious differences even when no change in stimulus has taken place, again not a new thing. People can have their perceptions biased by all...- nick_charles
- Post #66
- Forum: Sound Science
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Understanding Digital and Analog Jitter
- nick_charles
- Post #57
- Forum: Sound Science
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Understanding Digital and Analog Jitter
The study I was referring to is from 1998 Theoretical and Audible Effects of Jitter on Digital Audio Quality Eric Benjamin and Benjamin Gannon Dolby Laboratories Inc. San Francisco, CA 94103-4813, USA Published by the AES ...It was at the time the best attempt to define Jitter...- nick_charles
- Post #52
- Forum: Sound Science
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Understanding Digital and Analog Jitter
Were you one of Benjamin and Gannon's subjects - cool !- nick_charles
- Post #50
- Forum: Sound Science
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Objectivists board room
Interesting, how did you get such a wonderous jitter inducer and how much jitter was audible to you ? I've never owned even a cheap device where I suspected jitter to be an issue. But if you really want possibly audible jitter you need to spend a lot of money..McIntosh Jitter- nick_charles
- Post #2,984
- Forum: Sound Science
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Why would 24 bit / 192 khz flac sound any better than 16 bit / 44.1 khz flac if both are lossless (if at all)?
Dunn's papers are very informative and definitely worth reading, the only thing that his and Hawksford's (also highly readable) papers lack is that, they do not address audibility of jitter except as a mathematical model based on rather extreme sound pressure levels. To date we have little...- nick_charles
- Post #374
- Forum: Sound Science
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A Meta-Analysis of High Resolution Audio Perceptual Evaluation (or How We Learned to Stop Worrying and Love Hi-Res)
Several already discounted papers appear in the meta--analysis inc papers from Meridian who are not agenda free, first 4 citations are papers written before High def even existed. Pras is dubious at best, since the successes were failures (more wrong than right by chance but significant...- nick_charles
- Post #18
- Forum: Sound Science
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Looking for double blind test event about phase inversion
Hydrogen Audio has a few threads about this including one where at least one "objectivist" has confirmed a verifiable ability to detect phase inversion, but as already mentioned you can do phase inversion in Audacity and test yourself- nick_charles
- Post #4
- Forum: Sound Science
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Uncompressed Lossless (WAV) vs Compressed (FLAC / ALAC) - O/T discussion moved from main forum thread
The inversion seems okay in Audacity - the inverted and non-inverted files have the same FR spectra the problem seems to be with the act of adding the inverted and non-inverted files and then exporting the result which has the residual grunty - but since we have the 1000x FLAC/WAV result...- nick_charles
- Post #125
- Forum: Sound Science
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Uncompressed Lossless (WAV) vs Compressed (FLAC / ALAC) - O/T discussion moved from main forum thread
I've had problems with Diffmaker in the past where two copies of the exact same file do not null correctly (ymmv) - I worked out that the alignment was not perfect . With Audacity (for me on my system with my files) even two copies of the **same** 16/44.1 file with one inverted do not...- nick_charles
- Post #113
- Forum: Sound Science