Things You'll Need:
c. Mac or Windows Computer
d. Non-DRM song (i.e. one not bought from the iTunes Store)
1. Open up iTunes on your Mac or PC.
2. Find the song that you want to make into a ringtone.
3. Listen to the song and find the part of it you want to use. You don't always want to start at the beginning.
4. Using iTunes, write down the start and stop times of the clip you want to use.
5. Right-click the song and select "Get Info" and then click the "Options" tab.
6. Type in the start time of your ringtone in the text box next to "Start Time" in the minutes:seconds (i.e. 1:07) format.
7. Next you need to type in the end time of your ringtone in the text box next to "Stop Time." Make sure the ringtone is no more than 35 seconds long.
8. Click on "OK" when you have done that.
9. Once again, right-click your song and select "Convert Selection to AAC." Wait for iTunes to convert your song. It will create a duplicate version.
10. Right-click the ringtone and select "Delete."
11. Click on the "Keep Files" button.
12. Now you need to find the file which is usually in your "User" folder under Music > iTunes > iTunes Music and under the band's name. It will have an extension of "m4a."
13. Replace the "m4a" extension of your ringtone with "m4r". You can double-click the file to rename it, or right-click and select "Get Info" on a Mac or select "Rename" on a Windows PC. Click yes or use .m4r when the systems pops up a warning message.
14. Next, double-click the ringtone file. ITunes will automatically add it to your ringtones folder in your iTunes Music Library.
15. Connect your iPhone and sync your ringtones. You may need to select, sync ringtones from the options.
Let me know how you get on...