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Old 19th March 2013, 03:01 PM   #1
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Default Soundcard performance - realistic?

Hi,

I recently splurged for a hi-end soundcard (RME Fireface USB). Not cheap but I insisted on 192k sampling AND USB interface.

Downloaded the Virtins measurenments software, and after a lot of problems got the software talk to the hardware in MS XP.

To my surprise I got the loop-bacjk results sown in the attachements. To say it looks nice is an understatement - it is extremely good, so good I am doubting these results. Even at 100mV it is still incredible good.
Has anyone reading this seen similar results for this or any other soundcard?

jan
Attached Files
File Type: pdf RME1Vloop.pdf (40.5 KB, 98 views)
File Type: pdf RME100mVloop.pdf (45.6 KB, 50 views)
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Old 19th March 2013, 03:35 PM   #2
jcx is online now jcx  United States
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why not attach images - I have little patience, seldom open pdf

the plots don't show any thermal noise floor - likely you haven't figured out the setup/configuration yet and are looking at "digital loopback"
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Old 19th March 2013, 04:22 PM   #3
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Have you calibrated the system using a known voltage level?
I get these sort of readings with Visual Analyzer and other programs before I run a calibration routine.

jer
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Old 19th March 2013, 07:36 PM   #4
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The Fireface is good, but... not so good
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Old 19th March 2013, 08:20 PM   #5
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Quote:
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why not attach images - I have little patience, seldom open pdf

the plots don't show any thermal noise floor - likely you haven't figured out the setup/configuration yet and are looking at "digital loopback"
Yeah there is a hardware and software loopback - guess which one I had active ...

jan
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Old 19th March 2013, 08:21 PM   #6
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Quote:
Originally Posted by xstreme View Post
The Fireface is good, but... not so good
It's not easy to find an external card that does 24/192 AND USB interface..

jan
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Old 19th March 2013, 10:51 PM   #7
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Quote:
Originally Posted by jan.didden View Post
It's not easy to find an external card that does 24/192 AND USB interface..

jan
yes ...

one of the top five

Hilo Reference A/D D/A Converter System

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Old 20th March 2013, 07:34 AM   #8
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Also the top price...

I did some more testing with my RME and it looks like there is an issue with the ASIO driver.
RME has a test app called Digicheck which is like a background level meter on steroids. Digicheck sees my input in 'hardware level' mode but not in 'asio mode'.
I'm trying to get something out of the RME users forum.

jan
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Old 20th March 2013, 09:38 AM   #9
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Jan, which OS are you using? For me, it was a lot easier to get my soundcard to do what I want in 7 than XP or Vista, but "experts" assure me that XP really is optimum IF things are configured correctly. Of course, one apparently needs to be an expert to get XP configured correctly... When I was forced to switch out my lab computer to my old XP box (I hate you, HP!), I could never get ASIO to work properly.
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Old 20th March 2013, 09:39 AM   #10
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Quote:
Originally Posted by jan.didden View Post
Also the top price...

I did some more testing with my RME and it looks like there is an issue with the ASIO driver.
RME has a test app called Digicheck which is like a background level meter on steroids. Digicheck sees my input in 'hardware level' mode but not in 'asio mode'.
I'm trying to get something out of the RME users forum.

jan
Matthias (of RME) ...is one of the best ...
I have one Fireface 800 and babe gets her duty very well.
The Hadware Level get levels directly from the internal DSP on the Fireface.
Try to install a old ( < 5.51 ) Digicheck and look if still fail.
The major functions of Digicheck get info from the internal DSP, this is the best way to check any audio functions.
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