Visit Apple's iTunes page.Click the "Download Now" button and press "Run" on the subsequent menu that appears. Follow the on-screen instructions, making sure to check the terms and condition box, then click "Finish" to complete installation.
Save your tune in Audacity. Go to the "File" menu and click "Export as WAV." Type your track name in the text box provided and press "OK."
Open iTunes. Open the "File" menu. Click on "Export WAV" and select the track name you entered previously.
Click on "Create playlist" and select your track to be part of that playlist (you can only burn playlists to audio CD on iTunes, not individual tracks).
Open the "Preferences" menu at the top of the screen and select "Burning." Check the box marked "Audio CD" and click "OK."
Select the playlist that includes your track(s). Click the "Burn disc" button in the bottom-left of the screen. Enter your CD-R disc into the CD drive of your computer. Click "Burn disc" again.