All my music in iTunes is saved using the AAC format, I think i'd like to convert the whole lot to MP3 as i burn a lot of CD's. As I have over 2000 songs, once converted they would all be doubled, how do you sort them out so you onlt have the MP3 ones, do you simply delete the AAC version, that would take ages!?!
One or 2 songs wouldnt convert, and were missing from the CD. I have the origional cd but they wont convert! I'll keep playing!
Appreciate your help 
Hi... If you open iTunes on the LHS is Library / Music click on Music and you will see all your tracks listed in iTunes. Then go to view / view options and deselect everything apart from Artist / Album / Time / Track Number / Kind, Then click OK
Now you will see just the above columns. Now click on the top of the column KIND next to the word itself. You should now have an little arrow next to the word KIND. You can scroll down the page and see all your tracks are sorted in what kind of file they are. You should only be able to convert non protected files I think

To convert to MP3 a batch (multiple) click on the first file and whilst holding down the shift button click on the last file to be converted, now right click and select convert to MP3. Now sit back and wait.......
once finished don't touch anything. the original files (ACC) should still be selected in blue now right click again and select delete. confirm delete and delete from HDD. you should only be left with MP3 versions now. carry on doing this until all your tracks are converted to MP3.
You could select all Acc files tonight and leave it converting over night whilst in bed...
As a note any original cd you put in should convert straight to MP3...
cheers
Martininwillerby