Playing Mac Pro Audio - Teach Yourself Visually Complete Mac Pro - page 532

Click Use .m4r .
A Finder converts the file to a ringtone.
Double-click the file.
iTunes plays the ringtone and adds the file to the Tones section of the library.
TIP
Do I need to keep the short version of the track?
No, you can delete it by following these steps:
In iTunes, click the short version of the track.
Click Edit .
Click Delete .
iTunes asks you to confirm.