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About pkane2001

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    Galactic Wanderer

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  1. @opus101 Do you agree with the main premise of the article? And the conclusion of the cited study, which appears to support the above main premise:
  2. works as long as you add fresh ice to the bucket
  3. run a water cooler to remove the heat, then run the water through a bucket full of water and ice add some alcohol to the water to stop it from freezing. Believe it or not, that works for quite a while.
  4. Still requires a radiator and a fan. In amateur astronomy, peltier-cooled CCD chips are a must to reduce noise during a long exposure. The better ones use nitrogen-filled electronics compartment to prevent condensation. Some do use water cooling to remove heat from the hot side of the peltier. Professional cameras usually use liquid nitrogen.
  5. You can set the desired temperature, say -75C! Condensation may become a problem, though.
  6. Here you go: https://hothardware.com/news/evga-closed-loop-liquid-nitrogen-cooling-system
  7. Yes, if you don’t know what you’re doing, you’re likely to mess up. Surprising, right?
  8. Good try, but in this case, there's no indication as to how the 'bad' capture was produced. There's so much jitter in it that I'd be surprised it had anything to do with settings. At least I can't imagine what setting would cause this.
  9. To close the loop. Looking into the other ADI-2 Pro FS capture with lower scores, it appears to be using a different filter, and has an excessive amount of jitter. The first capture shows around 13μs RMS jitter over the entire recording, while the second one shows 186ns. The shape of the phase difference plot is also obviously different between the two. The first one is shaped as an inverted letter U, the second one is nearly a straight line.
  10. Hold the presses! Found another loopback recording. This one is described as using ADI-2 Pro FS with sharp filter setting for both, DAC and ADC. A much better result (see last item):
  11. I'll try to dig into it, didn't have the time to look in detail. Unfortunately, it's not clear under what conditions the loopback recording was made, with what settings, etc. Let's see if DW can help to find what was causing the large error.
  12. Here are the DeltaWave results for the few loop back files I could find. The others were no longer available, so I couldn't test them. Unfortunately, can't confirm that, for example, RME FF800 was not recorded through a digital loopback, similar to your first attempt with M2. In any case, Motu M2 doesn't look that bad at all. Remember that this is the combination of the DAC and ADC, so individually, ADC and/or DAC may perform even better.
  13. The Gearslutz measurements are a little out of date DeltaWave corrects for the non-linear phase effects (which is usually caused by the filters in the DAC and the ADC). Since these are usually not audible differences, the Gearslutz results are way too low. I've had a conversation with Didier who is running the list about updating the list, at least to add the new, corrected measurements. But he's reluctant to do so, claiming that the results are already too confusing and complex and he doesn't want to add to the confusion Maybe at some point I'll just set up DeltaWave to run through all the uploaded files on that thread and produce and publish my own list of results... Let me run some of these through DW (assuming the loopback files are available) to get proper results.
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