heartbeat works

Assets/SZZ/Code/Scripts/BackgroundAudioController.cs

@@ -4,12 +4,12 @@
 using UnityEngine;
 public class BackgroundAudioController : MonoBehaviour {
-    [SerializeField] private AudioSource OSTSource;
+    [SerializeField] public AudioSource OSTSource;
     [SerializeField] public bool playOST = true;
     public static BackgroundAudioController instance;
-    private AudioSource currentAudio;
+    public AudioSource currentAudio;
     private Coroutine waitForAudioCoroutine;
     private Action onAudioEnd;

Assets/SZZ/Code/Scripts/Level/Timer.cs

@@ -25,9 +25,10 @@ void Start() {
     void Update() {
         if (!running)
             return;
-
-        if (remainingTime - Time.deltaTime > 0)
+        if (remainingTime - Time.deltaTime > 0){
             remainingTime -= Time.deltaTime;
+             PlayHeartbeat();
+            }
         else {
             remainingTime = 0;
             running = false;
@@ -54,6 +55,9 @@ private void PlayHeartbeat() {
         if (remainingTime <= fashHeartbeatThreshold)
             source = remainingTime > fashHeartbeatThreshold / 2 ? heartbeatSources[1] : heartbeatSources[2];
-        backgroundAudioController.Play(source, () => PlayHeartbeat());
+        if(!backgroundAudioController.currentAudio.isPlaying || backgroundAudioController.currentAudio == backgroundAudioController.OSTSource){
+            Debug.Log("Play heartbeat");
+            backgroundAudioController.Play(source, () => PlayHeartbeat());
+            }
     }
 }

Assets/SZZ/Level/Scenes/building a.unity

@@ -24573,6 +24573,12 @@ Transform:
     type: 3}
   m_PrefabInstance: {fileID: 937011645}
   m_PrefabAsset: {fileID: 0}
+--- !u!82 &939025055 stripped
+AudioSource:
+  m_CorrespondingSourceObject: {fileID: 6330820103093283617, guid: 1eb73f1b5311760469cc6e221f2538a9,
+    type: 3}
+  m_PrefabInstance: {fileID: 6330820102361427840}
+  m_PrefabAsset: {fileID: 0}
 --- !u!4 &939848585 stripped
 Transform:
   m_CorrespondingSourceObject: {fileID: 4580154537569598494, guid: ea5dbed22855f6643ae5161cc71c250d,
@@ -54089,6 +54095,16 @@ PrefabInstance:
       propertyPath: questField
       value: 
       objectReference: {fileID: 944964131}
+    - target: {fileID: 6330820103093283617, guid: 1eb73f1b5311760469cc6e221f2538a9,
+        type: 3}
+      propertyPath: m_Volume
+      value: 0.307
+      objectReference: {fileID: 0}
+    - target: {fileID: 6330820103093283619, guid: 1eb73f1b5311760469cc6e221f2538a9,
+        type: 3}
+      propertyPath: currentAudio
+      value: 
+      objectReference: {fileID: 939025055}
     m_RemovedComponents: []
   m_SourcePrefab: {fileID: 100100000, guid: 1eb73f1b5311760469cc6e221f2538a9, type: 3}
 --- !u!1001 &6819322687301725324