[PLUG] sound "card" voltage levels

[Denis Heidtmann]

On Sat, Dec 29, 2012 at 4:42 PM, Larry Brigman <larry.brigman at gmail.com> wrote:
> Sounds like your input its set to mike instead of line.

That is what I thought, but it is not so.  Line and Mic are separate
input receptacles.
As I said in another message it was a mixer setting.

-Denis

> On Dec 29, 2012 3:46 PM, "Denis Heidtmann" <denis.heidtmann at gmail.com>
> wrote:
>
>> I have an Asus M3N78-VM MB with on-board sound only.  In trying to
>> debug overloading of signals using Audacity I found that the line
>> input produces a full undistorted signal at about 42mV RMS (~115 mV
>> P-P), and clipping at much above that.  These values are confirmed
>> with Fluke 87 and a Tek scope.  The clipping shows up in Audacity.
>> The web indicates that consumer audio line level signal should be 894
>> mV P-P, and my stereo receiver seems to agree that this value is the
>> correct order of magnitude.
>>
>> My MB manual says nothing about what they think line-level is, and
>> Google did not enlighten me about this type of problem with the MB.  I
>> see no hardware switches on the MB nor anything in the BIOS.
>>
>> Anybody have ideas?
>>
>> Thanks,
>> -Denis
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