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DAC Benchmark?
zerowalker
post Mar 8 2013, 19:11
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Just wondering, how can i know if a DAC is good or bad, is there a way to Benchmark?

I remember using some kind of software from Speaker Output to Line In to compare, but not sure it that was testing the DAC or something else.

Thanks
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saratoga
post Mar 8 2013, 20:10
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QUOTE (zerowalker @ Mar 8 2013, 13:11) *
Just wondering, how can i know if a DAC is good or bad, is there a way to Benchmark?


RMAA software to measure SNR, distortion, frequency response, crosstalk, etc. is the easiest. More elaborate measurements are possible, but require dedicated equipment.
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zerowalker
post Mar 8 2013, 20:30
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QUOTE (saratoga @ Mar 8 2013, 20:10) *
QUOTE (zerowalker @ Mar 8 2013, 13:11) *
Just wondering, how can i know if a DAC is good or bad, is there a way to Benchmark?


RMAA software to measure SNR, distortion, frequency response, crosstalk, etc. is the easiest. More elaborate measurements are possible, but require dedicated equipment.


Thanks, just found it.

But i donīt really know what the stuff means,

24-bit. 48 kHz

-0.04. -0.11
-85.8
80.7
0.0047
0.016
-85.8
0.015
+0.0. -0.0

This is the results i guess, is it good or bad?
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saratoga
post Mar 8 2013, 20:43
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QUOTE (zerowalker @ Mar 8 2013, 14:30) *
But i donīt really know what the stuff means,


Wikipedia is a great place to look up what things mean. Alternatively, you can ask here, although wikipedia is probably faster and better.

QUOTE (zerowalker @ Mar 8 2013, 14:30) *
This is the results i guess, is it good or bad?


Its hard to say since you posted the numbers but not the labels indicating what those numbers refer to. 80.7 is pretty good for SNR, not so good for % THD.
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zerowalker
post Mar 8 2013, 20:47
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QUOTE (saratoga @ Mar 8 2013, 20:43) *
QUOTE (zerowalker @ Mar 8 2013, 14:30) *
But i donīt really know what the stuff means,


Wikipedia is a great place to look up what things mean. Alternatively, you can ask here, although wikipedia is probably faster and better.

QUOTE (zerowalker @ Mar 8 2013, 14:30) *
This is the results i guess, is it good or bad?


Its hard to say since you posted the numbers but not the labels indicating what those numbers refer to. 80.7 is pretty good for SNR, not so good for % THD.



True, but i prefer to be able to get a discussion and an answer if possible. Itīs easier for me to understand more complicated stuff, as long as itīs not a simple answer.

And well, itīs written from Top to Bottom from how RMAA shows it, i wanted to get a log out of it, but i donīt know how to do it, and it crashes if i right click for some reason.

But i guess SNR means how low the signal can go until it becomes noise or something.

THD, isnīt that how much of % becomes disoriented from the original source?

I ran in MME and not Directsound if that matters*

This post has been edited by zerowalker: Mar 8 2013, 20:49
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saratoga
post Mar 8 2013, 20:52
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QUOTE (zerowalker @ Mar 8 2013, 14:47) *
And well, itīs written from Top to Bottom from how RMAA shows it, i wanted to get a log out of it, but i donīt know how to do it, and it crashes if i right click for some reason.


RMAA generates HTML webpages. Is RMAA crashing or your web browser?
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zerowalker
post Mar 8 2013, 20:54
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QUOTE (saratoga @ Mar 8 2013, 20:52) *
QUOTE (zerowalker @ Mar 8 2013, 14:47) *
And well, itīs written from Top to Bottom from how RMAA shows it, i wanted to get a log out of it, but i donīt know how to do it, and it crashes if i right click for some reason.


RMAA generates HTML webpages. Is RMAA crashing or your web browser?


I donīt get any HTML, i just get a bunch of stuff in 5 slots. I can choose where to put it, which i did to slot 1.
I have saved the result in an .sav file, but i never got any kind of Webpage log.

Itīs the Software which crashes when i am at the result with the 5 slots.

Edit: Found it!

Frequency response (from 40 Hz to 15 kHz), dB -0.04, -0.11 Excellent
Noise level, dB (A) -85.8 Good
Dynamic range, dB (A) 80.7 Good
THD, % 0.0047 Very good
THD + Noise, dB (A) -73.6 Average
IMD + Noise, % 0.016 Very good
Stereo crosstalk, dB -85.8 Excellent
IMD at 10 kHz, % 0.015 Very good

This post has been edited by zerowalker: Mar 8 2013, 20:55
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saratoga
post Mar 8 2013, 20:57
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QUOTE (zerowalker @ Mar 8 2013, 14:54) *
QUOTE (saratoga @ Mar 8 2013, 20:52) *
QUOTE (zerowalker @ Mar 8 2013, 14:47) *
And well, itīs written from Top to Bottom from how RMAA shows it, i wanted to get a log out of it, but i donīt know how to do it, and it crashes if i right click for some reason.


RMAA generates HTML webpages. Is RMAA crashing or your web browser?


I donīt get any HTML, i just get a bunch of stuff in 5 slots. I can choose where to put it, which i did to slot 1.
I have saved the result in an .sav file, but i never got any kind of Webpage log.


http://audio.rightmark.org/downloads/RMAA%...9;s%20Guide.pdf

From the manual I'd guess you're hitting the wrong button by one place.
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zerowalker
post Mar 8 2013, 20:58
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Yeah, i found it (edited the previous post).

Frequency response (from 40 Hz to 15 kHz), dB -0.04, -0.11 Excellent
Noise level, dB (A) -85.8 Good
Dynamic range, dB (A) 80.7 Good
THD, % 0.0047 Very good
THD + Noise, dB (A) -73.6 Average
IMD + Noise, % 0.016 Very good
Stereo crosstalk, dB -85.8 Excellent
IMD at 10 kHz, % 0.015 Very good
General performance Very good
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saratoga
post Mar 8 2013, 21:19
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Those results are pretty good, but keep in mind that if you are using the DAC to directly drive a pair of headphones (that is without an amp), performance will be worse when the actual load is hooked up. In that case, you would want to test by splitting the output between the line in and headphones to simulate normal use more directly.

If you're just using the device as a DAC (and have a separate amp or powered speakers), then you are basically done.
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zerowalker
post Mar 8 2013, 21:29
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QUOTE (saratoga @ Mar 8 2013, 21:19) *
Those results are pretty good, but keep in mind that if you are using the DAC to directly drive a pair of headphones (that is without an amp), performance will be worse when the actual load is hooked up. In that case, you would want to test by splitting the output between the line in and headphones to simulate normal use more directly.

If you're just using the device as a DAC (and have a separate amp or powered speakers), then you are basically done.


I currently only use it directly with my Headphones (though not the same connector, i use HD Audio connection from the motherboard to get it to the front panel).
But itīs the same sound card, built in.

But as i said in my other topic where i asked about Amps, i have now orderes Objective2 headphone Amp, so i should be set when i get them i guess:)
Though as i have read, my headphones HD 280 Pro, doesnīt seem to need amping, so i guess i wonīt notice any real difference.
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