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Are high sample rates better for DSP?
drewfx
post Jun 13 2012, 01:52
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QUOTE (Ethan Winer @ Jun 12 2012, 17:46) *
Thanks Drew for some hard evidence. Can you explain in layman's terms what the difference is between the two files after applying the same EQ? From the partial graph it looks like there's more boost at 10 KHz, but that doesn't seem right.


The 192kHz (orange) was about +6dB on the spectrum analyzer before the EQ was applied. I turned off the pre-EQ snapshots to make things easier to see, but they were essentially straight lines ~6dB apart.

Basically, the 2 curves are quite different at >15kHz, but you can also see the Q at 10kHz is a little different as well. For the part below 6kHz (covered by the EQ) they appear identical (~6dB apart).

So it's just a somewhat different EQ curve being applied in this case.

And you might note that the 48kHz curve in the analyzer arguably looks more like the curve in the EQ GUI anyway. smile.gif
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andy o
post Jun 13 2012, 03:27
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I'm guessing these are the reasons why A/V receivers and such oversample for DSP?
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Ethan Winer
post Jun 13 2012, 19:55
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QUOTE (drewfx @ Jun 12 2012, 20:52) *
The 192kHz (orange) was about +6dB on the spectrum analyzer before the EQ was applied. I turned off the pre-EQ snapshots to make things easier to see, but they were essentially straight lines ~6dB apart.

Great, thanks for clarifying.

QUOTE
And you might note that the 48kHz curve in the analyzer arguably looks more like the curve in the EQ GUI anyway. smile.gif

LOL.

Thanks to all for a very informative discussion. I think I have the correct answer now.

--Ethan


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I believe in Truth, Justice, and the Scientific Method
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Arnold B. Kruege...
post Jun 25 2012, 13:10
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QUOTE (andy o @ Jun 12 2012, 22:27) *
I'm guessing these are the reasons why A/V receivers and such oversample for DSP?


Do they?
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Woodinville
post Jun 27 2012, 21:59
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QUOTE (Arnold B. Krueger @ Jun 25 2012, 05:10) *
QUOTE (andy o @ Jun 12 2012, 22:27) *
I'm guessing these are the reasons why A/V receivers and such oversample for DSP?


Do they?


I'm aware of some that do nonlinearities that do not oversample, and have a disaster as a result. That's not quite what you asked, of course.


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