【Unity】SEの終了を知らせるコールバック

EndSECallBack.cs

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

public class EndSECallBack : MonoBehaviour {

	private AudioSource SE;

	void Start () {
		
		SE = GetComponent<AudioSource> ();
	
	}

	void Update () {

		if (Input.GetKeyDown (KeyCode.A)) 
		{
			SE.Play ();
			StartCoroutine (CheckSEPlaying (() => {
				Debug.Log("終わったよー");
			}));
		}
	}

	public delegate void EndSE();
	private IEnumerator CheckSEPlaying (EndSE callback) {
		while (true) {
			yield return new WaitForFixedUpdate ();
			if (!SE.isPlaying) {
				callback ();
				break;
			}
		}
	}
}