Re: [LAU] DC offset

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To: <linux-audio-user@...>
Date: Monday, January 30, 2012 - 10:29 am

On 01/30/2012 09:33 AM, Fons Adriaensen wrote:

My old EEE PC 4G has offset in its input connection. This is because the
microphone in has phantom power connected to it. I think this is
documented feature, but what is not, is that in computer hardware the AD
conversion is done before getting rid of the offset the phantom power is
causing. I think I even checked the schematics to confirm this. So
everything recorded is way of and will easily be limited. To put it
more accurately, if normally offset in scale -MAXINT - MAXINT should be
0, it would now be something like MAXINT/2. Could you be facing similar
problem here?

.j

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Messages in current thread:
[LAU] DC offset, Rustom Mody, (Sun Jan 29, 5:13 pm)
Re: [LAU] DC offset, Fons Adriaensen, (Sun Jan 29, 5:41 pm)
Re: [LAU] DC offset, Rustom Mody, (Mon Jan 30, 3:11 am)
Re: [LAU] DC offset, Fons Adriaensen, (Mon Jan 30, 8:34 am)
Re: [LAU] DC offset, Rustom Mody, (Mon Jan 30, 1:35 pm)
Re: [LAU] DC offset, Fons Adriaensen, (Mon Jan 30, 1:59 pm)
Re: [LAU] DC offset, Rustom Mody, (Mon Jan 30, 5:31 pm)
Re: [LAU] DC offset, Fons Adriaensen, (Mon Jan 30, 5:38 pm)
Re: [LAU] DC offset, david, (Tue Jan 31, 7:27 am)
Re: [LAU] DC offset, thijs van severen, (Tue Jan 31, 9:49 am)
Re: [LAU] DC offset, david, (Wed Feb 1, 7:09 am)
Re: [LAU] DC offset, Joel Roth, (Wed Feb 1, 9:55 am)
Re: [LAU] DC offset, Daniel Worth, (Thu Feb 2, 2:11 pm)
[LAU] Session management tools (was: Re: DC offset), Joel Roth, (Thu Feb 2, 10:46 pm)
Re: [LAU] Session management tools, fred, (Sat Feb 4, 5:56 am)
Re: [LAU] Session management tools, rosea.grammostola, (Sat Feb 4, 9:34 am)
[LAU] Audacity + persistent JACK ports -- was: DC offset, Robin Gareus, (Tue Jan 31, 12:24 pm)
Re: [LAU] Audacity + persistent JACK ports -- was: DC offset, Alexandre Prokoudine, (Tue Jan 31, 1:06 pm)
Re: [LAU] Audacity + persistent JACK ports -- was: DC offset, Fons Adriaensen, (Tue Jan 31, 1:38 pm)
Re: [LAU] DC offset, jsuomine, (Mon Jan 30, 10:29 am)