Unity AudioManager.cs singleton Instance

Unity AudioManager.cs (singleton)

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class AudioManager : MonoBehaviour {
    static AudioManager _instance = null;
    public static AudioManager Instance()
    {
        return _instance;
    }
	// Use this for initialization
	void Start () {
		if(_instance == null)
        {
            _instance = this;
        }
	}
	
	// Update is called once per frame
	void Update () {
	}
    public void PlaySfx(AudioClip clip)
    {
        GetComponent<AudioSource>().PlayOneShot(clip);
    }
}

Unity csAudioManager.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class csAudioManager : MonoBehaviour {
    public AudioClip clip;

    public void OnCollisionEnter(Collision collision)
    {
        AudioManager.Instance().PlaySfx(clip);
        Destroy(this.gameObject);
    }

}