Re: correct DC offset or uneven audio

In article <Xns9AA24E26FE600nobody@[EMAIL PROTECTED]
>, pb  <nobody@[EMAIL PROTECTED]
>
wrote:
>I corrected the DC offset so the base line is centered, but I can't
really 
>hear the difference. Because the original baseline moved toward the 
>bottom, the bottom part was much shorter than the part above the
baseline. 
>With that, you can't normalize it further. The volume is low since the 
>upper side is over the edge. How can the audio like this be further 
>enhanced?

You can't hear DC offset, no.  There's really nothing wrong with having
DC offset on a digital file, other than it's using a little bit of your
headroom that you could otherwise use for signal.

It sounds to me like you have a signal that is asymmetric to begin with,
maybe because it was clipped when it was recorded?

>I also found some recorded audio without DC offset problem but has a 
>little bit difference in length below and above the baseline. Is it 
>normal? What does it tell about the recording device?

Nothing about the recording device, just about the sound source.  Vocals
are asymmetric.  Triangles aren't asymmetric.  Bass drums are very
asymmetric.
Flutes aren't asymmetric.
--scott
-- 
"C'est un Nagra.  C'est suisse, et tres, tres precis."