1. Download iTunes from Apple
2. Double click iTunes Setup.exe to install
3. Launch iTunes
4. Go to the Edit Menu > then click Preferences
5. Click on the Advanced tab
6. Then click on the Importing tab
7. Now, in the “Import Using” dialog box, choose .WAV Encoder.
8. Then in the “Setting” dialog box, choose “Custom”
9. For “Sample Rate” choose 48 kHz.
10. For “Sample Size” choose 16-bit.
11. For “Channels” choose Stereo.
12. Then click OK.
13. Then OK again, to close the Preferences Box.Now your preferences are set up to convert audio files to an uncompressed file that will play smoothly in your editing software.
14. Now, insert a CD, or drop MP3s, AACs or files in many other kinds of audio formats into iTunes
15. Highlight all the items you want to convert, right-click, and choose “Convert Selection to WAV” from the popup menu.
16. Locate the items in your Music folder and put them in your project folder.

If you’d like to batch convert audio files on OSX, click here!