public class KnightAudio : MonoBehaviour {

    //private Animator anim;
    private NavMeshAgent agent;

    private AudioSource knightAudio;
    public AudioClip crying; //set this in ispector with audiofile
    public AudioClip scream; //set this in ispector with audiofile

    // Use this for initialization
    void Start () {
        knightAudio = GetComponent<AudioSource>();
        agent = GetComponent<NavMeshAgent>();
        //anim = GetComponent<Animator>();
    }

    // Update is called once per frame
    void Update () {
        if (!agent.isStopped)
        {
            knightAudio.clip = scream;
            knightAudio.Play();
        }
        else
        {
            knightAudio.clip = crying;
            knightAudio.Play();
        }

    }
}