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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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moozooh
post May 7 2012, 15:42
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Indeed, "v" has a very clear, immediately obvious high-pitched tone.


--------------------
Infrasonic Quartet + Sennheiser HD650 + Microlab Solo 2 mk3. 
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Arnold B. Kruege...
post May 7 2012, 20:13
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QUOTE (moozooh @ May 7 2012, 10:42) *
Indeed, "v" has a very clear, immediately obvious high-pitched tone.


My FFT analysis says that they both have tones at about 7880 and 15950 Hz, but in V they are about -80 and -78 dB down while in w they are -98 and -96 dB down. The noise floor of V is abut 6 dB higher above 5 KHz. The two noise floors are similar enough to raise some questions in my mind.

The fact that both noise floors are dominated by 120 Hz hum s at similar levels suggests to me that the source of the noise may be other parts of the test environment, perhaps even acoustical noise that is picked up by the mics.
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