Daphile - Audiophile Music Server & Player OS

"Evidence" is not sighted listening, but statistically significant positive results from blinded listening test. Please show me a single such result. I have never seen any, only subjective sighted-listening claims. Do you have positive results of a credible repeatable relevant ABX test? That would be something to build on.



How can you fix something you do not know whether it actually exists? How do you get feedback on changes implemented without "measuring" them? I am not saying it cannot exist, even though nobody has ever come with a technical explanation for any CONSISTENT cause. I have just never read of any actual confirmation. Feelings/opinions (sighted listening) are no evidence in this matter.



RT kernel/linux distribution introduces changes to scheduling. It plays key role in low-latency setups - CPU/kernel must keep up with the fast arriving interrupt requests. RT is indispensable e.g. for music production. For pure playback you want latency as large as affordable to minimize the risk of buffer underruns.



Recently I learned about an ARM board / USB DAC combination which throws IRQs every 125us = every USB2 frame = 8k IRQs/s. A regular kernel can hardly keep with this rate reliably, RT kernel has better chances. But that is basically a buggy hardware, nothing common. You want <10 IRQs/s instead.



Have you yourself tried blinded listening or anyone else tried? I have never seen stats, graphs, or any kind of research that confirms your theory? Only statements?!?
 
Clearly, a differently "altered" DAC clock and/or reference implies some difference in the output analog audio signal, and thus possible differences in the perceived sound, too.

You are right with this. No doubt the computer produces a lot of voltage noise. Just in no way can you affect this by software in a CONSISTENT manner. Especially not to produce the "reported" changes - stronger bass, more pronounced mids, etc. That would require intelligent filtering of the samples, not some random events of noise.

Often ground loops are main culprit of audible issues, class I grounded PC with huge currents (tens of amperes peaks) running through thin earth traces of the multiple-layer motherboard are extremely prone to this notorious problem. Ground loops are actually rather difficult to fight with consumer hardware (amps with single-ended inputs only yet designed as grounded class I devices, USB DACs without USB isolators, etc.).
 
Have you yourself tried blinded listening or anyone else tried? I have never seen stats, graphs, or any kind of research that confirms your theory? Only statements?!?

Of course I have tried blinded testing, e.g. my old Tool for A/B Testing | Blog IVITERA a.s. .

That is not my theory, it is a regular scientific procedure ABX test - Wikipedia . In fact it is common sense. Everyone has many times experienced how his senses are easy to get confused by our thoughts. You have to get rid of that influence. How? The easiest is by not knowing - hence the blind test.
 
Of course I have tried blinded testing, e.g. my old Tool for A/B Testing | Blog IVITERA a.s. .



That is not my theory, it is a regular scientific procedure ABX test - Wikipedia . In fact it is common sense. Everyone has many times experienced how his senses are easy to get confused by our thoughts. You have to get rid of that influence. How? The easiest is by not knowing - hence the blind test.



Anyone can say this and bring this on as proof. I can say it as well and bring it on as proof don’t I?
 
bottom line: the 32 and 64 sound like they have an upper mid hump with rolled off highs. (on my computer, in my system, with my ears). Only the RT sounds "normal", which is a godsend, because I thought I was going to have to scrap the whole thing and start using another system. My only gripe at this point is how buggy the RT version is for me with numerous reinstalls, etc. The latest bug this week is having to restart it every day when I get home because my remote ui says it can't find the page. (perhaps a wifi issue now, since "Daphile" oddly shows up in my available networks while this problem is occurring. Now, if that's all just expectation bias so be it... but really the only expectation I ever had was the dumb thing to just work.
 
Okay, but where is the scientific research..., trusted blind testing reports and so on that prooves it is not possible? Show them please!

It is only extraordinary claims that require extraordinary evidence.

We don't need to prove "it is not possible" with every random claim. It is up to the claimant to provide proof for the claim when it goes against established scientific understanding.
 
You say "we", do I understand you count yourself into the group of established science? Hahaha:wave: :wave::wave:

That was what they taught me at university, and that is what I have learned to respect in my (mostly technical) work career. OK, electrical engineering is of course only applied science, but I have had the pleasure and honour to work with some really good research scientists. How about you?
 
That was what they taught me at university, and that is what I have learned to respect in my (mostly technical) work career. OK, electrical engineering is of course only applied science, but I have had the pleasure and honour to work with some really good research scientists. How about you?

I cannot believe it, it's not scientifical! It's is called blinded :bfold: taking of evidence. Show some prudentials!
 
volvoturbo - either argue, or go somewhere else. Your posts are not related to the topic anymore.

I don't want to argue, I just want you to remember 2 questions I asked you, a while ago:

1. For what reason did Kipeta develop a RT-version?
2. Reports, stats, graphs on the ABX tests you say you made
3. Another one comes into my mind: A doctor's declaration of your ears being in good functioning health? I do not mean to offend you, why should I, but do you see the ridiculousness of furnishing arguments with scientific proof as is!
 
I don't want to argue, I just want you to remember 2 questions I asked you, a while ago:

1. For what reason did Kipeta develop a RT-version?

You have to ask him. I already gave my hints in a previous post.

2. Reports, stats, graphs on the ABX tests you say you made

I made a few ABXs with negative results. Did I make any claims publicly to support with positive ABX results? Why should I supply any charts?

3. Another one comes into my mind: A doctor's declaration of your ears being in good functioning health? I do not mean to offend you, why should I, but do you see the ridiculousness of furnishing arguments with scientific proof as is!

You seem to fail understand the argument. YOU are the one claiming YOU hear it, YOU are the one bringing the proof so that we can take your claim seriously. My ears are not those who claim to hear it.

Waste of time discussing with you.
 
I don't want to argue, I just want you to remember 2 questions I asked you, a while ago:

1. For what reason did Kipeta develop a RT-version?
2. Reports, stats, graphs on the ABX tests you say you made
3. Another one comes into my mind: A doctor's declaration of your ears being in good functioning health? I do not mean to offend you, why should I, but do you see the ridiculousness of furnishing arguments with scientific proof as is!

You say you don't want to argue, so... Let's say you walk into a pub, and start a discussion by stating "the earth is flat!". Someone responds with "What makes you say that?", and you answer "Because I see it with my own eyes". If the person responds with "no, it isn't, it's round", and you counter with "Can you prove that? And can I see an opthoalmologist's declaration that your eyes are in good functioning health?"

Can you see how that discussion could go rapidly downhill?