Click on and launch Cool Edit Pro, and open your recording session.
Double-click on your vocal track, which opens up your waveform in the the "Edit View" window.
Right-click on the waveform. An option window opens. Select the "Select Entire Wave" option, which highlights your entire vocal track.
Click on the "Effects" tab at the top of your screen. A drop-down menu appears. Select the "Time/Pitch Change" option, which opens a separate window.
Look to the left of the window that just opened. Select the "Pitch Correction" option in the option box.
Choose the key that you want to which you want to pitch-correct. If the song is in the key of C, correct to C.
Click, "OK." The audio track is tuned.