You can not use the Adobe Audition Pitch Correction in real-time in the multi-track window. You have to select the track you wish to pitch correct, and double click it to go into the edit window. Here is the vocal line in the song without pitch correction.

It is best to pitch correct the vocal track line by line. Select the first line, then go to pitch correction. The Automatic function can be very good if you know the key you’re in, I find it a little unreliable if I use the chromatic scale setting. I am singing in A Major for this piece, but there are some parts of the song where I need to sing a C natural which is not in the key of A major, so I can’t just pitch correct the entire song to A major. However, I can pitch the first line to A major. The next line, I can adjust the pitch manually by selecting the manual tab, finding the note that needs tweaking and then adjust the envelope as shown in the picture. So I can go through the entire song quite quickly line by line either adjusting to the key signature, or manually adjusting any notes that either don’t fit the key signature or are too far off.

Here’s the corrected vocal line, it’s just done roughly because it’s only a rough vocal take for a demo of a song. And no amount of pitch correction could make a rough vocal take sound great.

Extreme pitch correction can be used as an interesting effect… In adobe audition just turn everything up to max and pretend you’re Daft Punk, or Cher, or a robot.