Implement working BGM player

Assets/Scripts/Audio/BGM.cs

@@ -0,0 +1,33 @@
+using UnityEngine;
+using UnityEngine.SceneManagement;
+
+namespace Scampz.GameJam.Assets.Scripts.Audio
+{
+  public class BGM : MonoBehaviour
+  {
+    [SerializeField]
+    private AudioClip[] backgroundMusic;
+
+    public AudioClip GetClipFromSceneType(Scene scene)
+    {
+      AudioClip audioClipToPlay = null;
+
+      if (scene.name.Contains("Temple"))
+        audioClipToPlay = backgroundMusic[0];
+      if (scene.name.Contains("Sanctum"))
+        audioClipToPlay = backgroundMusic[1];
+      if (scene.name.Contains("Snow"))
+        audioClipToPlay = backgroundMusic[2];
+      if (scene.name.Equals("SnowC"))
+        audioClipToPlay = backgroundMusic[3];
+      if (scene.name.Contains("Airship"))
+        audioClipToPlay = backgroundMusic[4];
+      if (scene.name.Equals("AirshipInside"))
+        audioClipToPlay = backgroundMusic[5];
+      if (scene.name.Contains("Void"))
+        audioClipToPlay = backgroundMusic[6];
+
+      return audioClipToPlay;
+    }
+  }
+}

Assets/Scripts/Audio/BGM.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 62078f3dc064b304a9a033d66fa1157a
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Assets/Scripts/Audio/BGMManager.cs

@@ -1,5 +1,4 @@
-using System.Collections.Generic;
-using System.Linq;
+using Scampz.GameJam.Assets.Scripts.Audio;
 using UnityEngine;
 using UnityEngine.SceneManagement;
 
@@ -9,52 +8,64 @@ namespace Scampz.GameJam.Assets.Scripts
   {
 
     [SerializeField]
-    private AudioClip[] backgroundMusic;
+    private BGM _backgroundMusic;
 
-    private static BGMManager _instance;
     private static AudioSource _audioSource;
 
-    public static BGMManager Instance
+    private void Awake()
     {
-      get
+      if (_audioSource == null)
       {
-        if (!_instance)
-        {
-          _instance = new GameObject().AddComponent<BGMManager>();
-          _instance.name = _instance.GetType().ToString();
-          _audioSource = new GameObject().AddComponent<AudioSource>();
-          DontDestroyOnLoad(_instance.gameObject);
-          DontDestroyOnLoad(_audioSource.gameObject);
-        }
+        _audioSource = new GameObject().AddComponent<AudioSource>();
+        _audioSource.loop = true;
+        DontDestroyOnLoad(_audioSource.gameObject);
+      }
 
-        return _instance;
+      if (_backgroundMusic == null)
+      {
+        Instantiate(_backgroundMusic);
+        DontDestroyOnLoad(_backgroundMusic.gameObject);
       }
     }
 
-    public void PlaySong()
+    private void OnEnable()
     {
+      SceneManager.activeSceneChanged += PlayNextSongIfAreaChange;
+    }
+
+    private void OnDisable()
+    {
+      SceneManager.activeSceneChanged -= PlayNextSongIfAreaChange;
+    }
+
+    private void PlayNextSongIfAreaChange(Scene oldScene, Scene newScene)
+    {
+      if (_audioSource.clip == null)
+      {
+        var newMusic = _backgroundMusic.GetClipFromSceneType(newScene);
+        PlayBGM(newMusic);
+        return;
+      }
+
+      Debug.Log($"Changed scenes to " + newScene.name);
+      var newAudioClip = _backgroundMusic.GetClipFromSceneType(newScene);
+
+      if (_audioSource.clip.name != newAudioClip.name)
+      {
+        PlayBGM(newAudioClip);
+      }
+      Debug.Log($"Playing BGM: " + _backgroundMusic.name);
+
+    }
+
+    public void PlayBGM(AudioClip audioClip)
+    {
+      if (_audioSource == null && _audioSource.clip == audioClip)
+        return;
+
       _audioSource.Stop();
-
-      var sceneCount = SceneManager.sceneCount;
-      var scenes = new List<Scene>();
-
-      for (var i = 0; i < sceneCount; ++i)
-        scenes.Add(SceneManager.GetSceneAt(i));
-
-      AudioClip audioClipToPlay = null;
-
-      if (scenes.Any(x => x.name.Contains("Temple")))
-        audioClipToPlay = backgroundMusic[0];
-      if (scenes.Any(x => x.name.Contains("Sanctum")))
-        audioClipToPlay = backgroundMusic[1];
-
-      if (audioClipToPlay != _audioSource.clip)
-      {
-        _audioSource.clip = audioClipToPlay;
-        _audioSource.Play();
-      }
+      _audioSource.clip = audioClip;
+      _audioSource.Play();
     }
-
-
   }
 }