What is your point? There is no result other than someone can purportedly tell the difference between two broken POS DACs in a blind test. Shocking. I have no interest in what happens at SuperDumbAudioFriends so I'm going to stop here.
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You keep crying out for testing, so maybe do something useful?
Bombastic comments don’t do much to aid the credibility of your opinions.
Bombastic comments don’t do much to aid the credibility of your opinions.
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Chris:
"I don't think that is all that happens, but it isn't clear from the datasheet. Just like the ESS DAC, the actual converter is multi-bit and so there probably still needs to be conversion to the internal 6-bit or whatever format it's using. It is unclear what the width of the data coming out of the DSD interface block is."
The data sheet block diagram for the direct DSD mode of the AKM chips clearly shows that the input bypasses all DSP of the chip, and converts the single bit stream of DSD directly via the converter stage. this is a feature of the AKM chips, and certainly differs form how, ESS, for example, handle DSD. The Direct DSD mode does not interact at all with the SDM part of the chip.
"I don't think that is all that happens, but it isn't clear from the datasheet. Just like the ESS DAC, the actual converter is multi-bit and so there probably still needs to be conversion to the internal 6-bit or whatever format it's using. It is unclear what the width of the data coming out of the DSD interface block is."
The data sheet block diagram for the direct DSD mode of the AKM chips clearly shows that the input bypasses all DSP of the chip, and converts the single bit stream of DSD directly via the converter stage. this is a feature of the AKM chips, and certainly differs form how, ESS, for example, handle DSD. The Direct DSD mode does not interact at all with the SDM part of the chip.
There is a block it goes through still if you look closely, even if volume control is disabled. Maybe it is still 1-bit out of it, but it’s not clear. We know the converter actually accepts the output of the modulator normally, which is not 1-bit.
I’m not crying out for testing, perhaps you have me confused with someone else? Your obsession with me is strange and I don’t care what you think of me or my opinions.
No confusion. Objective results are what you’re after. You do care. Thats why you keep responding and being bombastic.
Raj1,
The arguing isn't going to solve anything, and it can easily get out of hand. Chris may sometimes express himself in a way that reads to some more like 'claim of fact' as opposed to 'sharing of opinion.' That's just his personality at this point in his life. Most of us by now have figured that out and just take it with a grain of salt if it goes against our own experience.
The arguing isn't going to solve anything, and it can easily get out of hand. Chris may sometimes express himself in a way that reads to some more like 'claim of fact' as opposed to 'sharing of opinion.' That's just his personality at this point in his life. Most of us by now have figured that out and just take it with a grain of salt if it goes against our own experience.
Anybody ever seen an ADC that was affected by small clock timing adjustments, and the fact is not described in the datasheet? Some people 'know' that can't be possible because if it was then it would be described in the datasheet.
Before someone says, okay maybe for an exotic ADC but not for a consumer dac, it has been seen with dac chips too.
Before someone says, okay maybe for an exotic ADC but not for a consumer dac, it has been seen with dac chips too.
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AKM told me that they tweaked the internal timing on one of their chips for better distortion on the 44.1 clocks, which I had measured. And it was not on the datasheet. And just because the published block diagram doesn't show something does not mean there aren't more things going on inside. They are not going to show all their proprietary magic for all competitors to see. Especially Japanese companies.
Examples?
What "small clock timing adjustments"?
What was not described in the datasheet?
Can you estimate a number of "us"?
How many of them are considering themselves Golden Ears?
Are they all experts in massacring otherwise perfectly fine DAC boards?
Don't know, maybe, nobody is debating that timing can affect the distortion performance, but should such an internal detail be outlined in the datasheet? Why would a design detail like this be important for the designers using these chips?
Just like most of “us” know that you claim to hear all kinds of nonsense. Like when you jump into all kinds of threads telling people what sounds best because you’re the authority? Sure reads like claims of fact.
Pot, meet kettle 😉.
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Maybe you are blind? There’s a big block at the very left called DSD Data Interface / DSD filter that it goes through. Just because the DSD doesn’t go through the modulator does not necessarily imply they feed 1-bit directly to a 6-bit DAC. They may or may not do that, but your explanation is not satisfying.
It meets spec in either case so no "need" to mention in the data sheet but I noticed a distinct difference and that was their explanation. They may consider it part of a trade secret. The ESS stuff is full of these "undocumented" tweaks.
^^^
Sorry for being dense tonight, what "distinct difference" did you notice? Difference to what?
Sorry for being dense tonight, what "distinct difference" did you notice? Difference to what?
The difference is, though, that AKMs tweaks are internal to the design. The effect that syn08 saw with his ADC may not occur or occur differently on different boards. I’ve seen performance differences with LTC2387 that are due to deviations from the evaluation board. They aren’t dramatic and they aren’t some super secret tweaks that Linear are hiding. Sometimes the manufacturer isn’t even aware. Besides, the objections were never to tweaks that result in measurable changes on the analog output.
Happy holidays to all, even those I vehemently disagree with 🙂.
Happy holidays to all, even those I vehemently disagree with 🙂.
have you checked Singxer SDA-6 advanced version and Gustard A-22 ? it seems with good output stage