Calling a scripts function whenever another scripts function runs

Scripting
,
1

I’m making a pitch randomizer for my weapon audio sources in my game, and I want to be able to attach a script and just have the pitch change every time the audio source plays. I tried using UnityEvents to get this effect, but couldn’t quite get it to work in the way I wanted. If I could get some advice pointing me in the right direction it would be much appreciated :slight_smile:

using UnityEngine;
using UnityEngine.Events;

public class AudioPitchRandomizer : MonoBehaviour
{
    [SerializeField] float range;
    private AudioSource source;

    UnityEvent OnAudioPlayed = new UnityEvent();

    private void Start()
    {
        source = GetComponent<AudioSource>();

        OnAudioPlayed.AddListener(source.Play);
    }
    private void Update()
    {
        if(OnAudioPlayed)
        {
            ChangePitch();
        }
    }
    void ChangePitch()
    {
        source.pitch = 1 + Random.Range(-range, range);
    }
}
2

You have UnityEvent backwards. When you call AddListener on UnityEvent (line 15 in your code), you’re adding a callback that will get called when you call ‘Invoke’ on UnityEvent:

It doesn’t listen for when the passed in listener is called. It calls the listener when the event is invoked.

…

What you’ll need to do is in the place where you call ‘Play’ on the AudioSource, also call some event.