I have been buying some music on itunes, it comes in AAC (.m4a) format, which is great to use in itunes (I have it on a Windows 7 running over VirtualBox), or to use it in my iPod Touch or iPod shuffle, but if I want to use it in my cell phone (an old one which does not support AAC format) I have to convert it to mp3, I have to also convert it if I plan to use mpg123 which I use a lot.

Well lets go to learn how to convert from AAC to MP3

If you have installed Picard in Arch Linux, and you try to explore the CD "CD Lookup", you may get an error like this:

Error While reading CD

Error opening library: libdiscid.so.0 cannot open shared object file: No such file or directory

That is because, you may have not installed libdiscid.so.O, so go ahead and install it from yaour.

yaourt libdisc

I do not have a very big mp3 music files collection, just 2 to 3 gigs of them, but I have made it over the years, and some of the original CDs are missed, so I can not import them again.