Continues to play audio in different scenes

Question

In my Unity Project, there are different menus, and each menu is a different scene. Each scene has button for controlling the music.

public void musicToggle(GameObject Off){
        if (PlayerPrefs.GetInt ("Music") == 1) {
            musicPlayer.Stop ();
            Debug.Log ("Stop 2");
            PlayerPrefs.SetInt ("Music", 0);
            Off.SetActive(true);
        }
        else {
            musicPlayer.Play ();
            Debug.Log ("Play 2");
            PlayerPrefs.SetInt ("Music", 1);
            Off.SetActive (false);
        }
    }

This is my musicToogle function. In every scene the music restarts, and in every scene when I want to turn on/off the music, I click a button which deploys this code. However, I don't want the music to restart every scene change, I want it to resume, and I want to be able to control the music(turn on/off) in every scene. How can I do this ?

Answer 1

My answer assumes that musicPlayer variable is a type of AudioSource.

There are really two ways to do this:

1.Instead of using musicPlayer.Stop to stop the music,

Use musicPlayer.Pause(); to pause then music then use musicPlayer.UnPause(); to un-pause it. This will make sure that the music resumes instead of restarting it.

In this case, you use DontDestroyOnLoad(gameObject); on each GameObject with the AudioSource so that they are not destroyed when you are on the next scene.

---

2.Store the AudioSource.time value. Load it next time then apply it to the AudioSource before playing it.

You can use PlayerPrefs to do this but I prefer to store with json and the DataSaver class.

Save:

AudioSource musicPlayer;
AudioStatus aStat = new AudioStatus(musicPlayer.time);
//Save data from AudioStatus to a file named audioStat_1
DataSaver.saveData(aStat, "audioStat_1");

Load:

AudioSource musicPlayer;
AudioStatus loadedData = DataSaver.loadData<AudioStatus>("audioStat_1");
if (loadedData == null)
{
    return;
}
musicPlayer.time = loadedData.audioTime;
musicPlayer.Play();

---

Your AudioStatus class:

[Serializable]
public class AudioStatus
{

    public float audioTime;

    public AudioStatus(float currentTime)
    {
        audioTime = currentTime;
    }
}

Answer 2

You will need to create a singleton class and instantiate it on your first scene, then you can pass it around your various scenes as described in this unity answer: http://answers.unity3d.com/answers/12176/view.html