Re: Apple Computer changes its name

["Jeff Blakeney" <jeff.blakeney@a2central.com.remove-4qv-this>]

  To: bieling
On Mon, 15 Jan 2007 05:39:10 -0800, "bieling" <bieling@terra.es>
wrote:

>Let's say that we've got a music file with a bitrate x. We burn this
>file into a CD (AIFF), then we encode it from the CD's AIFF into
>another mp3 file with the same bitrate x as the original. The question
>is, have we really lost any quality in the process? I ask because I'm
>not so sure... ?

Look at it this way, you start off with the original full quality,
uncompressed data on a CD.  That is compressed into whatever format
(AAC in the case of iTunes) which throws away some of the data (almost
all popular audio compression technologies are lossy) so you get a
lesser quality but smaller version of the data.

If you uncompress that you still don't get the full quality original
back but a version that is good enough.  Now, if you compress that
again, this recompression, which is again lossy, will throw away more
data so you end up with a lesser quality version of the already lesser
quality version.

The only way to avoid this is the only get uncompressed data or data
that has been compressed with a lossless algorithm.  However, I
believe if you get data with higher bit rates you can lessen this
effect.

Jeff Blakeney
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