1. Open iTunes and find the song you want to make into a ringtone.
2. Listen to the song and decide what part of it you want to be the ringtone (must be less than 40 seconds).
3. Right-click on the song and select “Get Info,” then select the “Options” tab, then set the start and stop time for the section of the song you want to be the ringtone (such as 1:33 to 2:06, minute:second format).
4. Select “OK”
5. Right-click your song again and select “Convert Selection to AAC” and wait for iTunes to create a duplicate version of your song.
6. Right-click your newly converted song and select “Delete,” then select “Delete Song”, then select “Keep File.”
7. Find the file in your computer’s folders (mine was under “Libraries>Music>iTunes>iTunes Media>Music> then, under the band’s name – you should see two files here, the shortened length (file extension is .m4a) and the original. My shortened song was listed right above the original).
8. Right-click the shortened song and select “Rename” and change the file extension from .m4a to .m4r. If you do not see the file extension, you may have to look at the top left area of the page and select the drop down menu to Organize > folder, then select “search options” and click on the view tab. Uncheck “hide extension for known file types” then go back and rename your song with the .m4r file extension. You will probably get a warning that you are changing the file and it may affect playback, OR are you sure you want to change it—select ok.
9. To add the new ringtone to iTunes, all you have to do is double click on the new file name and it will automatically add it to your iTunes library. OR, go back to iTunes, select “File”, “Add file to library”, then find the .m4r ringtone and add it.
10. Connect your iPhone and sync your new ringtones!