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Author Topic: ODAC Measurements  (Read 13948 times)

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Marvey

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Re: ODAC Measurements
« Reply #10 on: August 12, 2012, 03:27:27 PM »

The ODAC is very high value, but those with money to burn should carefully seek something else.

In the end, measurements out from the transducer (at the end of the chain) will look the same or very similar regardless of amp because distortion will be dominated by the transducer and environmental noise.
« Last Edit: August 12, 2012, 03:29:56 PM by purrin »
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placebo-fi

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Re: ODAC Measurements
« Reply #11 on: September 14, 2012, 01:06:03 PM »

Has anyone compared the ODAC from standard laptop USB with ODAC from beefy power supply? I'm using my ODAC straight from my laptop right now which sounds great, but I still wonder if I'm missing any extra performance.
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Willakan

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Re: ODAC Measurements
« Reply #12 on: September 14, 2012, 05:10:59 PM »

Cool, it's a good DAC marked with a Scarlett Letter.
Sad isn't it?  Being your own worst enemy.  Even sadder is that most of its supporters won't hear it at its best because it's attached to an O2.

Attacking NwAvGuy for being rage-filled is kinda missing the point. As far as NwAvGuy is concerned with what he expresses, the end justifies the means (TBH, I kinda agree). He was never going to convince those already engaged in hi-fi they were all wrong, so he didn't even try, instead focusing on those entering the hobby or those peripheral to it (interested in upgrading their audio equipment to hi-fi quality, but not really that interested in audio.)

On that front, NwAvGuy has succeeded. Outside specialist audio communities, the O2/ODAC have gained a very impressive foothold, and frequently get recommended to amplify virtually any headphone that needs amping. Even in specialist audio communities the number of self-professed objectivists is rising dramatically, albeit with a large proportion of them nigh blindly accepting anything NwAvGuy tells them.

You can look at what he's done from two angles. From one perspective, NwAvGuy can be about blind faith in his designs/ideas (although the details for those who want to go deeper/acknowledgements of precisely what he's done are there for those interested in thinking his position through.) How he justifies himself is important, but only to an extent: he wants to give people the right idea, but in the end if the emphatic nature of their conclusions is not necessarily proportionate to their understanding that's not necessarily the end of the world.

Consider a naive subjectivist and a naive objectivist, neither particularly aware of the nuances of their own system of beliefs. The naive subjectivist might end up with a recabled HD700, an amplifier from Burson and a FOTM DAC off ebay. I'm not an idiot (honest!) and I almost bought the most outrageously crappy stuff on the recommendation of Head-Fi cheerleaders, before I...erm...found the light :D. The naive objectivist might conceivably underestimate the importance of equipment other than their headphones (albeit a problem NwAvGuy seeks to minimise by providing his "one-size-fits-all" box'o'audio amping and DACing), but in all likelihood they're not going to end up with a bad setup.

From the other angle, much of NwAvGuy's rhetoric and attitude can be explained by a comparison with Changstar. This website was set up away from Head-Fi to cut through the crap of a thousand differing and often misinformed/bizarre opinions and start making some value judgements which, whilst not universal, can be taken much more seriously. You've also adopted an irreverent tone and a tendency to not hold back on the statements as to whether a headphone is good or not when you've got multiple experienced ears and a CSD implying something is wrong. I don't think it would be too presumptuous to say that you want to "shake things up a bit".

For NwAvGuy, the amount of irreverence/strength with which he asserts his views increases in proportion with the view he is trying to challenge. The idea of amplifier measurements and the associated science being wholly inadequate to characterise what you real ly hear is ubiquitious in hi-fi, so he needed to make a bigger splash. That involves some mud-slinging.

Two groups basically end up fans of NwAvGuy. There are those who were arguing and thinking about points similar to his, albeit sometimes more precisely expressed (more discussion of logic, less car analogies), who are glad to see such solid engineering that revels in the devil-bearing details and benefits considerably for it. The other group is a large percentage of those new to hi-fi, especially those already inclined towards specs from other areas of technology, who leave his blog with, what is in my view, roughly the right ideas, albeit without the skills/knowledge to justify them. They get derided as ignorant zealots, but they do end up buying snake-oil free audio equipment. Even if you're a "subjectivist", would you rather all the newbs bought O2s or a incredibly wide range of equipment, a lot of which is complete crap?

As their numbers increase, you'll end up with more curious ones who'll start to fill in the gaps in their knowledge...the end result is a considerable raised profile for audio "objectivism", which is a good thing, possibly even for "subjectivists", in terms of increasing emphasis on basic measurable competencies and thus making audio better for everyone.

TL;DR (and this really needs one!): NwAvGuy wanted to make the audio hobby better. To do so, he needed to stir shit up. Nuances of belief can be fine-tuned later: first priority is to divert those entering hi-fi to a different belief system, which will, on the balance of probabilities, vastly improve their audio experience. He could have eloquently written about the importance of measurements and the burden of proof, but then very few people would read it or care. NwAvGuy's rather less measured approach has paid dividends: he knows exactly what he's doing.
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Marvey

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Re: ODAC Measurements
« Reply #13 on: September 14, 2012, 05:37:44 PM »

Has anyone compared the ODAC from standard laptop USB with ODAC from beefy power supply? I'm using my ODAC straight from my laptop right now which sounds great, but I still wonder if I'm missing any extra performance.


It's possible that you are not missing out. I think the USB +5V out is just weak or possibly out of spec on my VAIO laptop (it takes forever to charge my iPhone). You can always try stuff and report back.
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maverickronin

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Re: ODAC Measurements
« Reply #14 on: September 14, 2012, 05:56:52 PM »

TL;DR (and this really needs one!): NwAvGuy wanted to make the audio hobby better. To do so, he needed to stir shit up. Nuances of belief can be fine-tuned later: first priority is to divert those entering hi-fi to a different belief system, which will, on the balance of probabilities, vastly improve their audio experience. He could have eloquently written about the importance of measurements and the burden of proof, but then very few people would read it or care. NwAvGuy's rather less measured approach has paid dividends: he knows exactly what he's doing.

I kind of agree.  I don't really think he had anything planned out like that but he was still pretty successful.  The O2 and ODAC are pretty popular outside the "head-fi" circle among people who consider 'audiophile' to be a pejorative.

OTOH I think he might have been a little naive expecting to win an argument just because he was right
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Re: ODAC Measurements
« Reply #15 on: September 14, 2012, 06:05:09 PM »

@ Willakan

That's probably the best and most substantively well written and thought out post I've ever read of yours.  Of course, it's possible I've really missed out on some real gems on the other site, who knows.  ;) Thanks for taking the time and effort to do so. 

Many excellent points but I'd like to point out a few differences in my interpretation.

First, where we differ here to many in the other camp is that although we employ objective scrutiny and advocate it as a tool, we do not advocate (to my knowledge) absolutism and correlate listening to measuring on more equal footing.  Whereas, w/ the exception of select DBTs used to perpetuate a particular null hypothesis, the ear is removed from the equation on the premise our data acquisition and interpretation is comprehensive and complete.  That is a significant difference to me which impacts our approaches and end point of use.  Now there are a good number that straddle both lines which is good.  I don't like camps and fabricated bi-polar or tri-polar dichotomies but it is often the nature of anthropology so bleed over is a good thing.

Second, while it may be good that so-called 'novices' have avoided purchasing snake oil, it is not good that they have now closed the door to further scientific inquiry and will now espouse a largely religious view against their 'opponents'.  So they've saved some money but have closed their minds to new arguments and experiences.  Is the cure worse than the disease in this case?  I think it depends on what you want to measure, no pun intended. ;) Time and time again, I've seen how a little bit of knowledge can sometimes yield results worse than if they had no new knowledge at all.

Third, as for his motives and mission accomplishment?  Only he knows IMO.  I still have outstanding concerns and questions framed by my personal experiences and those of others based on various readings, interactions and observations.  Suffice to say, only he knows and what I think should only matter to me.  I'm always open to new information.
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Willakan

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Re: ODAC Measurements
« Reply #16 on: September 14, 2012, 06:49:08 PM »

I can only speak for myself (and it's entirely possible I'm misinterpreting you) but at the risk of going OT, the idea that we're about using blind tests to logically disprove things is possibly the most annoying misconception held about "objectivists" that I know. :)p3

As you've probably thought yourself, the idea of using a blind test to formally disprove something is patently absurd.

Also, at the risk of stating the blindingly obvious, measuring speakers, let alone headphones, is somewhat different from amplifiers/DACs. It's not too hard to work out what's going on in a wire in comparison to measuring the performance of a transducer.

EDIT: Also, wonderful emoticon selection  :)p13
« Last Edit: September 15, 2012, 08:54:54 AM by Willakan »
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sheya

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Re: ODAC Measurements
« Reply #17 on: September 25, 2012, 06:16:08 AM »

@ Willakan

That's probably the best and most substantively well written and thought out post I've ever read of yours.  Of course, it's possible I've really missed out on some real gems on the other site, who knows.  ;) Thanks for taking the time and effort to do so. 

Many excellent points but I'd like to point out a few differences in my interpretation.

First, where we differ here to many in the other camp is that although we employ objective scrutiny and advocate it as a tool, we do not advocate (to my knowledge) absolutism and correlate listening to measuring on more equal footing.  Whereas, w/ the exception of select DBTs used to perpetuate a particular null hypothesis, the ear is removed from the equation on the premise our data acquisition and interpretation is comprehensive and complete.  That is a significant difference to me which impacts our approaches and end point of use.  Now there are a good number that straddle both lines which is good.  I don't like camps and fabricated bi-polar or tri-polar dichotomies but it is often the nature of anthropology so bleed over is a good thing.

Second, while it may be good that so-called 'novices' have avoided purchasing snake oil, it is not good that they have now closed the door to further scientific inquiry and will now espouse a largely religious view against their 'opponents'.  So they've saved some money but have closed their minds to new arguments and experiences.  Is the cure worse than the disease in this case?  I think it depends on what you want to measure, no pun intended. ;) Time and time again, I've seen how a little bit of knowledge can sometimes yield results worse than if they had no new knowledge at all.

Third, as for his motives and mission accomplishment?  Only he knows IMO.  I still have outstanding concerns and questions framed by my personal experiences and those of others based on various readings, interactions and observations.  Suffice to say, only he knows and what I think should only matter to me.  I'm always open to new information.


I think that closing your mind to some "tweaks" is the only way to stay sane in this hobby.  It is very easy for everyone to hear differences that do not exist.  There is example after example of people who spend hundreds and thousands on snake oil such as tice clocks, crystals to go on cables, little metal spheres that attach to the wall, vibration control for components with no moving parts, the list could go on and on.  The problem is so entrenched that professional reviewers advocate these products, perhaps thinking that they hear a difference.  I'm not even sure that the people who sell them know that they do nothing, they are possibly even more deluded than their customers.

For every one Nwavguy (ok, there really is only one of him), there are dozens of people who review for online and print magazines, and respected members of forums who advocate for products that do nothing.  I understand your objections to him, they are well reasoned, but he makes for an excellent counter to the prevailing mythology.  One doesn't have to dive head first into full objectivism to appreciate that there is a need for a strong counter to all of the bunk that is so common in our hobby, if only to further rational discussion, like we are having right now.

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ihasmario

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Re: ODAC Measurements
« Reply #18 on: December 20, 2012, 05:46:00 AM »

TL;DR (and this really needs one!): NwAvGuy wanted to make the audio hobby better. To do so, he needed to stir shit up. Nuances of belief can be fine-tuned later: first priority is to divert those entering hi-fi to a different belief system, which will, on the balance of probabilities, vastly improve their audio experience. He could have eloquently written about the importance of measurements and the burden of proof, but then very few people would read it or care. NwAvGuy's rather less measured approach has paid dividends: he knows exactly what he's doing.

It didn't need to be done, because those who are poorly educated are poorly educated for a reason: they have no incentive to learn. Shouting about things won't change it, and they haven't. Instead, what we've witnessed is a shift from people new to the hobby asking "what amp and dac can i get for less than $100" and getting responses like "Littledot MKIII!111" to asking "what amp and dac can I get for less than $100" and getting this like ODAC and MAGNI. Instead of actual research taking place, we've moved from one parrot to another and both are equally as dangerous as eachother. But now instead of products and music being the idea, we've now got a figurehead. It's like that terrible shift rock and trance music took, where they started being about the musicians/act/spectacle as much as or more than the music.  :vomit:
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MuppetFace

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Re: ODAC Measurements
« Reply #19 on: December 20, 2012, 08:23:58 AM »

TL;DR (and this really needs one!): NwAvGuy wanted to make the audio hobby better. To do so, he needed to stir shit up. Nuances of belief can be fine-tuned later: first priority is to divert those entering hi-fi to a different belief system, which will, on the balance of probabilities, vastly improve their audio experience. He could have eloquently written about the importance of measurements and the burden of proof, but then very few people would read it or care. NwAvGuy's rather less measured approach has paid dividends: he knows exactly what he's doing.

It didn't need to be done, because those who are poorly educated are poorly educated for a reason: they have no incentive to learn. Shouting about things won't change it, and they haven't. Instead, what we've witnessed is a shift from people new to the hobby asking "what amp and dac can i get for less than $100" and getting responses like "Littledot MKIII!111" to asking "what amp and dac can I get for less than $100" and getting this like ODAC and MAGNI. Instead of actual research taking place, we've moved from one parrot to another and both are equally as dangerous as eachother. But now instead of products and music being the idea, we've now got a figurehead. It's like that terrible shift rock and trance music took, where they started being about the musicians/act/spectacle as much as or more than the music.  :vomit:

This is a good post.
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