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Which sample rate should I use w/ Xonar STX? Better performance at 96?, [was “Which default sample rate for my sound card ?” in General Audio]
extrabigmehdi
post Jun 29 2012, 14:12
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Hello,
before I was doing in my dsp chain in foobar:
sox set to 96 khz , followed by a big vst chain of dsp tweaked to my taste.
But I've realized that overall my dsp were performing worse than with 44.1 khz.

So now it's more like :
big dsp chain followed by sox set to 96 khz.

Why upsampling ?
My reasoning:

- the default sample rate of xonar stx after install is 96 khz

- I imagine that if I use different software, with different sample rate, they must be mixed to a single sample rate at one moment.
So I rather set a big sample rate on soundcard, and play music at that sample rate.

- the measurements at tech report website, indicate that the xonar stx perform better at 96 khz , than 44.1 khz.
for 44.1 khz : http://techreport.com/articles.x/17256/8
for 96 khz: http://techreport.com/articles.x/17256/9

- if I don't upsample , and set the default sample rate to 96 khz, I imagine that the upsampling
would be either handled by the windows mixer or the driver of sound card ?
So I rather use something that is well tested like sox.
I'm not sure if wasapi would bypass resampling by system.

- I can hear differences, but if you ask me to verify such claim, I don't know how it could be ABX ed.

Here are sample rate supported by soundcard:
44.1 khz, 48 khz, 96 khz, 192 khz

So which sample rate would you use , and why ? Since even tech report website indicate that the xonar stx perform better at higher sampling rate, is is pertinent to upsample using sox "on the fly" while playing music , or should I leave this work to the driver/soundcard/ windows mixer/ I don't know .
Does wasapi allow to bypass upsampling if the the sample rate set on soundcard doesn't match sample rate of played music ?

thanks
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extrabigmehdi
post Jun 30 2012, 05:32
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So, I finally did this famous RMAA Test for the first time (loopback test).
I wasn't sure which recording device to enable on system, I used "stereo mix":



So I tested all sampling rate using 16 & 24 bit depth.

It was confusing that the xonar stx allow to set a sampling rate with it's panel,
while windows allows to set also another sampling rate in the mixer, playback section huh.gif
Maybe there's a bug (both value should remain same, regardless of the interface used).

I found the results of rmaa a bit reliable, and although I tried to not touch the volume knob, I saw variations in the reported volume. Sometime I got too wrong result (maybe because I surfed a bit ?) so I've redone test.

Any here's a first serie of results:


And an other serie of results


I'm not sure there's a winning sampling rate, but I thought that 192 khz was more reliable.
Let me know what you think

This post has been edited by extrabigmehdi: Jun 30 2012, 05:35
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Posts in this topic
- extrabigmehdi   Which sample rate should I use w/ Xonar STX? Better performance at 96?   Jun 29 2012, 14:12
- - extrabigmehdi   oops sorry if I didn't post on hardware secti...   Jun 29 2012, 14:14
- - uart   QUOTE (extrabigmehdi @ Jun 29 2012, 05:12...   Jun 29 2012, 15:23
- - uart   QUOTE (extrabigmehdi @ Jun 29 2012, 05:12...   Jun 29 2012, 15:35
- - lvqcl   QUOTE - the measurements at tech report website, i...   Jun 29 2012, 16:02
- - Ceniza   On my side I have a Xonar HDAV1.3 Deluxe connected...   Jun 29 2012, 19:43
- - extrabigmehdi   So, I finally did this famous RMAA Test for the f...   Jun 30 2012, 05:32
|- - uart   QUOTE (extrabigmehdi @ Jun 29 2012, 20:32...   Jun 30 2012, 09:28
|- - dhromed   QUOTE (extrabigmehdi @ Jun 30 2012, 06:32...   Aug 31 2012, 09:02
- - skamp   I'm not sure the "Stereo Mix" featur...   Jun 30 2012, 09:55
|- - uart   QUOTE (skamp @ Jun 30 2012, 00:55) I...   Jun 30 2012, 13:14
- - lvqcl   QUOTE while windows allows to set also another sam...   Jun 30 2012, 10:49
- - extrabigmehdi   Yeah I meant that the RMAA test was a bit unrelia...   Jun 30 2012, 13:22
|- - uart   QUOTE (extrabigmehdi @ Jun 30 2012, 04:22...   Jun 30 2012, 13:44
- - extrabigmehdi   Ok , I've redone the rmaa test with "line...   Jun 30 2012, 16:19
- - stephan_g   You should be getting better 16-bit results still ...   Jul 2 2012, 17:03
|- - extrabigmehdi   QUOTE (stephan_g @ Jul 2 2012, 16:03) You...   Jul 2 2012, 18:22
- - YellowOnion   I did my own loopback testing via sox after I was ...   Oct 22 2012, 23:07
- - Kohlrabi   Yet another hint to avoid ALIASUS hardware like th...   Oct 23 2012, 00:40


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