Headbobber with Footstep Sounds?

So ive basically applied the Headbobber script (http://wiki.unity3d.com/index.php?title=Headbobber) to the Standard FPS Controller. Now I was wondering how I could get the footsteps to be in sync with the headbobber? Ive been trying for ages but dont have a clue

If you knew how to do it, I would appretiate an answer
I am a begginner at Unity.

 

You could use a height variable as a trigger. Anytime the height of the camera falls below a designated point, then the footstep audio is played.