Audio Management

AudioManager.cs

using UnityEngine;
using System.Collections;

public class AudioManager : MonoBehaviour {

  public GameObject audioChannelPrefab;
  private AudioSource[] audioChannels = new AudioSource[12]; // 12 channels

	void Start() {
	  for (int i = 0; i < audioChannels.Length; i++) {
	    GameObject channel = Instantiate(audioChannelPrefab) as GameObject;
	    audioChannels[i] = channel.GetComponent<AudioSource>();
	  }
	}
	
	AudioSource GetFreeChannel() {
	  for (int i = 0; i < audioChannels.Length; i++) {
	    if (!audioChannels[i].isPlaying) {
	      return audioChannels[i];
	    }
	  }
	  return null;
	}

	public void Play(AudioClip clip, Vector3 location, float pitch) {
	  AudioSource channel = GetFreeChannel();
	  if (channel == null) return; // no available channels
	  
	  // set transform position
	  channel.transform.position = location;
	  
	  // play clip
	  channel.clip = clip;
	  channel.pitch = pitch;
	  channel.Play();
	}

}