Re: [MLUG - DISCUSSION] iTunes music files (was "You had to know itwas coming")

[Mike Miller <EMAIL:PROTECTED>]

On Wed, 12 Jan 2005, Jonathan King wrote:

> On Tue, 11 Jan 2005 08:16:11 -0600, Spurling, Shannon <EMAIL:PROTECTED> wrote:
> 
>> That's an interesting statement. I am a little confused by what you are 
>> saying. I've never heard of mp4.
>
> But it does exist; google search for mp4.  It does apparently have a 
> relationship to Mpeg4 and is apparently "structured audio".  Now it 
> turns out that Mpeg4 Advanced Audio Coding (AAC) is the standard 
> underlying Apple's sound format for iTunes and the iTunes music store 
> (which sells DRM-protected AAC).  Actually, I'd say the usage "mp4" is a 
> bit sloppy, but understandable given the ubiquity of mp3 and the fact 
> that MPEG-4 audio is a superior standard.

Here's some info:

http://forum.doom9.org/showthread.php?s=&threadid=62723
http://www.osxhax.com/archives/000046.html

My best effort at a summary:  Apple iTunes files are actually "m4p" files 
which seem to be DRM-protected, encrypted m4a files, and m4a files are 
also known as mp4 files.  There are programs that allow you to convert the 
m4p to mp4 without any loss...

http://www.google.com/search?q=m4p2mp4

...and mp4 will play in many programs.

Mike
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