I try my hardest to believe that is in the mind as never bothered to measure my car before and after. Same with putting a tank of super in which I do every 6 months as it has a better detergent pack. Wallet is emptier so car must run smoother right?
LOLOL, as is the case with any purchase there is a lot of that involved...but to be sure the change in viscosity characteristics from new to several thousand miles is measurable.
I drive a car now that can take advantage of 93 octane gas and gets ~2-3 MPG better with it due to greater ignition advance before knocking. This just about offsets the increased cost, and I like the performance with 93 better for sure!
Cheers,
Howie
There was another effect with the lower grade oils, they would tend to allow pre-ignition easier. I never knew if it was a result of thermal hot spots, or the blow-by gasses contributing to that or not. That car had a lot of timing advance added too.
We’ll all be driving electric cars soon anyways, probably best to stick with audio, more rewarding I’m thinking!
We’ll all be driving electric cars soon anyways, probably best to stick with audio, more rewarding I’m thinking!
What consumers are not told... although fast etc off the show room floor.... all the GM HiPO cars have a built in timer that retards power until the engine is broken in.... Which is 10,000 miles. Then the full power is available and it is quit noticeable when it happens while driving. I believe it is done via retarded timing mostly.
-RNM
That would be something to celebrate for sure!
Or at least be prepared for, can you imagine not being prepared for that?
Or at least be prepared for, can you imagine not being prepared for that?
Looks like a good DAC, albeit not cheap...
Review and Measurements of Gustard DAC-X26 | Audio Science Review (ASR) Forum
... been driving a new M5 -- fantastic car....
Review and Measurements of Gustard DAC-X26 | Audio Science Review (ASR) Forum
... been driving a new M5 -- fantastic car....
JC mentioned LP does better in BW or Tr than CD ... especially with cart going out to 60KHz. Ditto speakers with fast rise times. There is a lot to be said about that and the higher sampling rate/bit digital recordings seem to also benefit in the same way, sonically.
Mark4 ... digital out now direct to BenchMark3 DAC. Very very nice. Detailed. 🙂
THx-RNMarsh
Mark4 ... digital out now direct to BenchMark3 DAC. Very very nice. Detailed. 🙂
THx-RNMarsh
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DACs
Once again on topic...I found the link to the Auralic filter white paper for anyone interested:https://www.auralic.com/download/flexible_filter_mode.pdf
For what it is worth I prefer Mode 4 for all of the HD files, the imaging seems more stable.
Cheers,
Howie
Once again on topic...I found the link to the Auralic filter white paper for anyone interested:https://www.auralic.com/download/flexible_filter_mode.pdf
For what it is worth I prefer Mode 4 for all of the HD files, the imaging seems more stable.
Cheers,
Howie
The modes are nothing but the digital implementation of various filters (elliptic, Chebyshev, Butterworth) of different types and orders. Nothing really outstanding here, except the claim for the subjective preference, which, if statistically justified, is interesting. Sacrificing ripple and slope for minimum group delay.
The differences in DAC interpolation filters are easy to hear if not masked by all the noise, distortion, and jitter artifacts in most dac implementations. Masking often is caused by power amp imperfections as well. With a good enough DAC and power amp combination, differences in the sound of various interpolation filter choices can be plain and obvious enough not to require blind testing. Although blind testing would be fine too, so long as nobody is expecting me to pay for it.
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Everything above are non issues in any modern, non pathological implementation of a DAC. It would take a really creative design process to build a clock with 10nS or more of jitter (which is claimed as the audibility threshold), distortions of 0.005% or better in the whole chain are very common, don’t even mention the noise and SNR in modern DACs, line level and power amps. So there should be no masking effects, waiting to see data about the audibility effects of the output reconstruction filter group delay.
Double blind tests are not necessary intended for discriminating small differences, but for building a serious, reproducible way of justifying subjective claims and eliminate biases of any kind.
Now waiting for Jakob to begin nitpicking 🙂
Threshold of audibility using what kind of dac? R-2R? An ESS Sabre S-D dac? Very big differences in the audible effects of jitter depending on details how the threshold is measured. Not all dacs are equally sensitive to jitter. Can you cite any audibility research with sufficient information about how the testing was conducted to replicate the experiment exactly?
Aren't modern ECUs marvellous. Over here 97 RON (yes I know confusing as we use a different measurement) is 7% more expensive around $.6 a gallon more so the savings are hard to get. Plus I like to use any performance boost so always get fewer miles out of a tank of the good stuff.
Again sure its in my head but convinced my car runs smoother for the next 1000 miles or so afterwards. Brains are funny things.
Jakob posted earlier in this thread a reference to the lowest jitter audibility test that I am aware of: 10nS. The diyaudio search engine is your friend. If you have a lower value reference/data, please come up with it. Hint: the Benjamin/Gannon paper I’m talking about is quoted in this AP white paper on jitter.
http://www.audiophilleo.com/zh_hk/docs/Dunn-AP-tn23.pdf
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Nobody does such testing with modern dacs. Research of that type is difficult and costly to do correctly, and the results tend to not be broadly generalizable. Used to be the US government would fund research grants for all sorts of things, often it was DOD even if no clear military connection. Those days are long gone. Even a lot of academic research today is funded by private industry and what papers do get published often contain very little useful information. Often the publications exist only to help some academic type get a promotion. You should know all that. Arguments asking for research that will not be funded in today's climate isn't going to settle any disagreements. Maybe someday one of the skeptics will take me up on my offer to come by for a visit and see for themselves. You would be very welcome too. That's the only thing under my power to make happen. Other than that, we may not have much choice but to continue to disagree.
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Understood, so you have no data to show, because it’s expensive. Therefore, everybody has to take your word on it.
That’s a classic argument/justification, sorry, I’m not buying.
There have been studies where the IM distortion of typical high frequency drivers can have a strong effect at the edge of audibility (~20k). You missed some now closed threads, cites of anything of substance have been sparse though.
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