1. Install and load QuickTime Pro. You can purchase QuickTime Pro at www.apple.com/quicktime.
2. Click on the File menu, choose Open Movie, and select your audio file.
3. Click on Open and your audio file will be loaded into the QuickTime Player.
4. Convert the file to AIFF.
From the File menu, choose Export.
5. From the Export menu, choose Sound to AIFF.
From the Use menu, choose Default Settings for the purpose of this exercise.
Choose the Media folder for your iMovie project.
Enter a new file name.
Click on Save.