AudioSync.cs

using UnityEngine;
using UnityEngine.Networking;
using System.Collections;

public class AudioSync : NetworkBehaviour
{

    public AudioController audioController;

    // Use this for initialization
    void Start()
    {

        audioController = GetComponent<AudioController>();
    }

    public void syncSound(int id)
    {
        CmdSendServerSound(id);
    }

    [Command]
    void CmdSendServerSound(int id)
    {
        RPCSendSoundToClients(id);
    }

    [ClientRpc]
    void RPCSendSoundToClients(int id)
    {
        audioController.steps.Play();
    }

}