How to network a VR button with PUN in Unity? - unity3d

Question

I've been working on a solution for weeks now and I think it's time to reach out. I'm trying to make a button that plays a sound when pressed by a controller, everyone will hear that sound. Using VRTK and PlayoVR, I'm able to make a non-networked version where the player can put their hand through a cube, click the trigger from the controller, and it makes a sound.
This is the code for that cube:
namespace VRTK.Examples {
using UnityEngine;
public class Whirlygig : VRTK_InteractableObject
{
public GameObject AudioSource;
public AudioSource LeftSpeaker;
public override void StartUsing(VRTK_InteractUse currentUsingObject =
null)
{
AudioSource.GetComponent<AudioSource>().Play();
}
}
}
Where I get lost is how to network it with Photon Unity Networking. This is what I have:
namespace PlayoVR
{
using UnityEngine;
using VRTK;
using UnityEngine.Video;
using NetBase;
public class PlaySync : Photon.MonoBehaviour
{
public AudioSource LeftSpeaker;
public GameObject Whirlgig;
private bool StartUsing;
// Use this for initialization
void Awake()
{
GetComponent<VRTK_InteractableObject>().InteractableObjectUsed +=
new InteractableObjectEventHandler(DoPlay);
}
void DoPlay(object sender, InteractableObjectEventArgs e)
{
StartUsing = true;
}
// Update is called once per frame
void Update()
{
// Handle firing
if (StartUsing)
{
CmdPlay();
StartUsing = false;
}
}
void CmdPlay()
{
photonView.RPC("NetPlay", PhotonTargets.All);
}
[PunRPC]
void NetPlay()
{
LeftSpeaker.Play();
}
}
}
As you can probably see, I'm a beginner. With this code, when I put my hand in the cube and press the trigger, nothing happens. If anyone can provide any help or even an alternative, I'd be very grateful.
Kind regards,
TheMusiken