Thanks for all answers. It seems like the USB card is just having a
smaller offset. It's odd because USB card is powered only by USB and
> Hi
> It is called DC offset remover in the effects menu
> THANKYOU DAVE-211
>
> ----- Original Message -----
> From: "Ng Oon-Ee" <
[hidden email]>
> To: "Discussion list for Audacity users"
> <
[hidden email]>
> Sent: Sunday, November 08, 2009 12:12 AM
> Subject: Re: [Audacity-users] strange recording graphics
>
>
>> On Sat, 2009-11-07 at 23:07 +1100, Dave wrote:
>>> ----- Original Message -----
>>> From: "Aleksandar Kostadinov" <
[hidden email]>
>>> To: "Discussion list for Audacity users"
>>> <
[hidden email]>
>>> Sent: Saturday, November 07, 2009 6:33 PM
>>> Subject: [Audacity-users] strange recording graphics
>>>
>>>
>>> > Hallo,
>>> >
>>> > I'm recording with audacity. When I record through the built-in sounds
>>> > card, I'm seeing graphics like the attached where everything is above
>>> > the central line. Playback sounds normal though. When I record through
>>> > an external USB card, graphics is centered towards the horizontal
>>> > line.
>>> >
>>> > I wonder what causes this difference and can I make anything to correct
>>> > that?
>>> >
>>> > Thanks!
>>> >
>>> Hi
>>> Looks to me you have a DC offset coming though, would depend on you
>>> system
>>> but on board sound is not usually that good, most things you would plugin
>>> or
>>> listen to would have AC coupling . the USB is probably AC coupled so no
>>> offset.
>>>
>> Fixed your mail =). Bottom-posting is easier to read, thanks.
>>
>> My laptop's input gives a bit of DC offset as well, but in my experience
>> it doesn't seem to affect sound quality much, if at all, as long as the
>> recorded track didn't 'shift' between instruments which gave different
>> DC offsets.
>>
>> I remember some (expensive) windows audio software allowed DC offset
>> correction, does Audacity support that through one of the plugins?
>>
>>
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>
>
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record.png (1012 bytes) 
