CSHARP

unity audio

using System.Collections;
using UnityEngine;

public class AudioManager : MonoBehaviour
{
    [SerializeField]
    private AudioSource sampleAudioSource = null;

    void Awake(){
		if (sampleAudioSource == null)
            Debug.LogError("AUDIO_MANAGER: sampleAudioSource is NULL");
    }

    public void PlaySampleSound()
	{
    	sampleAudioSource.Play();
    }
}

Audio Unity

private AudioSource audio; // Get the audio
void Start()
{
	audio = GetComponent<AudioSource>();  // Get the component(Add the component first and don't forget to atach the audio)
	PlayAudio(); // Call the PlayAudio Function
}
void PlayAudio()
{
	audio.Play(); // Play the audio use Stop() to stop the audio
}