Abstractly speaking, this should be the right advice. However, based on the graph https://audiosciencereview.com/foru...ts-of-topping-d50-dac.2403/page-49#post-94424, MODE7 looks better on me.
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Review and Measurements of Topping D50 DAC
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derp1n
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Right, I forgot the anomalous filter results for the D50. However, given the filtering is implemented within the ES9038Q2M, they should be very similar to the DX7s results and I think it's most likely that Amir's results are in error. Certainly needs more investigation.
The measurements for the filter MODE5 in DX7s also raise doubts: theoretically the best, its looks far from being so on the background of the rest filters.
derp1n
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Can you be more specific? What's wrong with the DX7s results?
Very strange "waves" on the chart at frequencies above 65 kilohertz, with values above -110 dB.
You can hear that?
No surprise, google the ESS datasheet and find what filter 5 looks like. I won't post the link directly as it is confidential.
The ESS data sheet is secret??
The first few pages are available at ESS's website, but the full one is confidential.
It's enough that I see that. "PCM Filter Characteristics (Linear Phase Fast Roll Off) - Stop band < –120dB" - this in your opinion corresponds to the graph?
If it is inaudible I can't see that it matters. You can enlighten me, though.
Looks like a graph with values BELOW -120 dB, which is not the same thing.
derp1n
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Because Amir's graphs are for an actual device with an output stage after the DAC. The graphs in the datasheet are just for the filter itself.
You're arguing/concerned about something that's not a problem at all. RIP credibility.
The meaning is that the values listed in the datasheet are not achieved.
This is the evidence that MODE5 is not the best choice.
derp1n
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It's not evidence of anything, sorry.
I'll use your words: Can you be more specific?
https://audiosciencereview.com/foru...ng-dx7s-dac-and-headphone-amp.2378/post-92653
I was not following this thread but now I understand all the confusions.
[1] Archimago's TEAC UD-501 doesn't use ES9038Q2M. Their filter types are arranged in different ways.
[2] Archimago's filter tests are intersample clipped, probably Amir's Topping D50 as well. Archimago realized it later and all of his newer "Digital Filter Composite" graphs contain white noise at both 0dBFS and -4dBFS. For example:
http://archimago.blogspot.com/2017/05/measurements-smsl-idea-usb-dac.html
More info about intersample clipping:
https://audiosciencereview.com/foru...ation-audible-intersample-clipping-test.2231/
https://audiosciencereview.com/forum/index.php?threads/intersample-over-test.3730/post-89453
I was not following this thread but now I understand all the confusions.
[1] Archimago's TEAC UD-501 doesn't use ES9038Q2M. Their filter types are arranged in different ways.
[2] Archimago's filter tests are intersample clipped, probably Amir's Topping D50 as well. Archimago realized it later and all of his newer "Digital Filter Composite" graphs contain white noise at both 0dBFS and -4dBFS. For example:
http://archimago.blogspot.com/2017/05/measurements-smsl-idea-usb-dac.html
More info about intersample clipping:
https://audiosciencereview.com/foru...ation-audible-intersample-clipping-test.2231/
https://audiosciencereview.com/forum/index.php?threads/intersample-over-test.3730/post-89453
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