Hey guys,

I have a bit of a question. I'm trying to do some interesting stuff here as of late, but this is making things confusing for me.

When I do a ls -la of one of my iTunes Music directories (specifically, one of the albums), I get a list that looks something like this...

Macintosh-225:Lost and Found niclake$ ls -la
total 102976
drwxrwxrwx 1 niclake niclake 32768 Jun 3 22:41 .
drwxrwxrwx 1 niclake niclake 32768 Jun 3 22:41 ..
-rwxrwxrwx 1 niclake niclake 4096 Aug 8 21:25 ._01 Determined.m4a
-rwxrwxrwx 1 niclake niclake 4096 Aug 8 21:25 ._02 Pushing Through.m4a
-rwxrwxrwx 1 niclake niclake 4096 Aug 8 21:25 ._03 Happy_.m4a
-rwxrwxrwx 1 niclake niclake 4096 Aug 8 21:25 ._04 IMN.m4a
-rwxrwxrwx 1 niclake niclake 4096 Aug 8 21:25 ._05 Fall into Sleep.m4a
-rwxrwxrwx 1 niclake niclake 4096 Aug 8 21:25 ._06 Rain. Sun. Gone..m4a
-rwxrwxrwx 1 niclake niclake 4096 Aug 8 21:25 ._07 Choices.m4a
-rwxrwxrwx 1 niclake niclake 4096 Aug 8 21:25 ._08 Forget to Remember.m4a
-rwxrwxrwx 1 niclake niclake 4096 Aug 8 21:25 ._09 TV Radio.m4a
-rwxrwxrwx 1 niclake niclake 4096 Aug 8 21:25 ._10 Just.m4a
-rwxrwxrwx 1 niclake niclake 4096 Aug 8 21:25 ._11 All That You Are.m4a
-rwxrwxrwx 1 niclake niclake 4096 Aug 8 21:25 ._12 Pulling the String.m4a
-rwxrwxrwx@ 1 niclake niclake 2599823 May 9 2008 01 Determined.m4a
-rwxrwxrwx@ 1 niclake niclake 3388537 May 9 2008 02 Pushing Through.m4a
-rwxrwxrwx@ 1 niclake niclake 3539245 May 9 2008 03 Happy_.m4a
-rwxrwxrwx@ 1 niclake niclake 5687093 May 9 2008 04 IMN.m4a
-rwxrwxrwx@ 1 niclake niclake 3763628 May 9 2008 05 Fall into Sleep.m4a
-rwxrwxrwx@ 1 niclake niclake 4472929 May 9 2008 06 Rain. Sun. Gone..m4a
-rwxrwxrwx@ 1 niclake niclake 7861556 May 9 2008 07 Choices.m4a
-rwxrwxrwx@ 1 niclake niclake 3497794 May 9 2008 08 Forget to Remember.m4a
-rwxrwxrwx@ 1 niclake niclake 3358200 May 9 2008 09 TV Radio.m4a
-rwxrwxrwx@ 1 niclake niclake 2940759 May 9 2008 10 Just.m4a
-rwxrwxrwx@ 1 niclake niclake 6021780 May 9 2008 11 All That You Are.m4a
-rwxrwxrwx@ 1 niclake niclake 4949001 May 9 2008 12 Pulling the String.m4a

My question is... what exactly are those hidden files? Do they store metadata? Are they necessary? What happens if I delete these?

Also, you can do this within your iTunes Music directory to find all those hidden files I'm talking about... sudo find . -name ._[0-9][0-9]* -print

Thanks guys,
-Nic