Unity3D Playing Sound when Player Collides with an Object with a specific tag

Hey everyone! 

I using Unity 2019.2.14f1 to create a simple 3D game, as you know from previous posts.

In that game, I want to play a sound anytime my Player collides with a gameObject with a specific tag.

The MainCamera has an Audio Listener and I am using Cinemachine Free Look, that is following my avatar, inside the ThridPersonController (I am using the one that comes on Standard Assets - but I have hidden Ethan and added my own character/avatar).

For the collisions, I accessed the Third Person Character script, in order to destroy a gameObject (with a specific tag) when colliding with it, I have added the following:

void OnCollisionEnter(Collision other)
        {
            if (other.gameObject.CompareTag("Present"))
            {
                Destroy(other.gameObject);
                count = count - 1;
                SetCountText();

            }
        }

It is working properly as that specific object is disappearing on collision.

Now, for the Audio, I see two possible ways of making it work.

The first one, by simply adding an Audio Source to the ThirdPersonController (with the AudioClip that I wanted to call) and added GetComponent<AudioSource>().Play(); to the if statement as it follows:

void OnCollisionEnter(Collision other)
        {
            if (other.gameObject.CompareTag("Present"))
            {
                Destroy(other.gameObject);
                count = count - 1;
                SetCountText();
                GetComponent<AudioSource>().Play();
            }
        }

Does the work and it plays the sound when the player collides with the gameObject with the tag "Present".

Another way, and it is the one that I intend to make it work as it is more versatile (and can work nicely with a variety of AudioSources), is the following:

Start by adding a gameObject with the tag that I want to destroy has an Audio Source:

Then, created an empty gameObject to serve as the AudioManager and added a new component (C# script) to it:

using UnityEngine.Audio;
using System;
using UnityEngine;

public class AudioManager : MonoBehaviour
{

    public Sound[] sounds;

    // Start is called before the first frame update
    void Awake()
    {
        foreach (Sound s in sounds)
        {
            s.source = gameObject.AddComponent<AudioSource>();
            s.source.clip = s.clip;

            s.source.volume = s.volume;
            s.source.pitch = s.pitch;
        }
    }

    // Update is called once per frame
    public void Play (string name)
    {
        Sound s = Array.Find(sounds, sound => sound.name == name);
        s.source.Play();
    }
}

And created the script Sound.cs:

using UnityEngine.Audio;
using UnityEngine;

[System.Serializable]
public class Sound
{
    public string name;

    public AudioClip clip;

    [Range(0f, 1f)]
    public float volume;
    [Range(.1f, 3f)]
    public float pitch;

    [HideInInspector]
    public AudioSource source;
}

After that, in the Unity UI, I went to the Inspector in the gameObject AudioManager, and added a new element in the script that I named: CatchingPresent.

Now, in order to play the sound "CatchingPresent" anytime the Player collides with the object with the tag, in this case, Present, I have tried adding the following to the if in the OnCollisionEnter:

• FindObjectOfType<AudioManager>().Play("CatchingPresent");

But I get the error:

The type or namespace name 'AudioManager' could not be found (are you missing a using directive or an assembly reference?)

• AudioManager.instance.Play("CatchingPresent");

But I get the error:

The name 'AudioManager' does not exist in the current context

As all the compiler errors need to be fixed before entering the Playmode, I now need to fix one of these two problems.

I already checked and there isn't another AudioManager class.

I tried reimporting my scripts from the editor (right click in the project folder > Reimport All).

The problem persists, so any guidance on how to make the sound playing after a collision between the player and the gameObject with the tag Present is appreciated.

Best regards,

Gonçalo Peres