iTunes: How to convert a song to a different file format - http://support.apple.com/kb/HT1550 - including information about different formats and discussion about compression.
In iTunes 11 "Create..." is in the File menu, not the Advanced menu.
You don't understand what I mean.
an aiff file is on my desktop.
When I click on « Create...» in the File menu, iTunes is unable to convert this aiff file.
But in the last version, it does.
The search engine give a liste of results, but not in the itunes windows.
The illustration of Album don't appear in the left corner like the last version.
Sad of this.