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Built-In Soundcard, Threat or Menace? (Fran Guidry), ABX RealTek HD
ZinCh
post May 5 2012, 01:48
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Here you can find Article, Setup with pictures, WAV samples for ABX:

http://www.homebrewedmusic.com/2012/05/04/...reat-or-menace/

You can try to ABX before or after reading article:

v.wav
w.wav
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dhromed
post May 7 2012, 14:53
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Ok, there are two tones in both files, at 10.7KHz and 15.9KHz, with some slight harmonics above and below.
In v, both are more than 72dB down.
In w, both tones are all but gone.

v also has a slew of other tones and their harmonics at various frequencies. In w these are completely missing.

All four tones are clearly visible in foobar2k's spectrogram after boosting the gain to +45dB (and lowering the output volume to 0, of course happy.gif ).
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