Unity AudioSource Extention PlayCompleteCallback with async/await

AudioSourceExtention.cs

using System;
using System.Collections;
using System.Collections.Generic;
using System.Threading.Tasks;

using UnityEngine;

public static class AudioSourceExtention
{
    public static async Task PlayWithCompCallback(this AudioSource audioSource, AudioClip audioClip, float volume = 1f)
    {
        audioSource.Play(audioClip, volume);

        int audioClipLengthMs = (int)TimeSpan.FromSeconds(audioClip.length).TotalMilliseconds;

        await Task.Delay(audioClipLengthMs);
    }
}