Unity 3D how to find the gameobject which is instantiating a not declared component AudioListener

I have a multiuser application which runs with Photon Unity Network (PUN) and Photon Audio. With Photon Audio, audio is streamed to the PUN server and then sent to all the players in the game. Photon Audio has a wrapper class on top of the core Unity audio classes to do their streaming.

I am using guidance from this forum https://forum.photonengine.com/disc...l-voice-conversations-into-wav-mp3-etc#latest where it says that to record the full application output mix you can use MonoBehaviour.OnAudioFilterRead if implemented on an object with AudioListener.

The problem is that I cannot find the gameobject which is already creating an instance of AudioListener, so I cannot create my own gameobject with AudioListener because it appears as a second instance.

I tried to use:

Code (CSharp):

1.     var foundObjects = FindObjectsOfType<AudioListener>();
2.     Debug.Log("**** " + foundObjects + " : " + foundObjects.Length)

which returns saying there is one active instance of AudioListener:

Code (CSharp):

1. **** UnityEngine.AudioListener[] : 1
2.     0x000000014179D92B (Unity) StackWalker::GetCurrentCallstack
3.     0x000000014179F5DF (Unity) StackWalker::ShowCallstack
4.     0x00000001417796A0 (Unity) GetStacktrace
5.     0x0000000140D3F23B (Unity) DebugStringToFile
6.     0x0000000140D3FA1C (Unity) DebugStringToFile
7.     0x00000001413FE562 (Unity) DebugLogHandler_CUSTOM_Internal_Log
8.     0x000000003C8F2F5B (Mono JIT Code) (wrapper managed-to-native) UnityEngine.DebugLogHandler:Internal_Log (UnityEngine.LogType,string,UnityEngine.Object)
9.     0x000000003C8F2E44 (Mono JIT Code) [DebugLogHandler.cs:9] UnityEngine.DebugLogHandler:LogFormat (UnityEngine.LogType,UnityEngine.Object,string,object[])
10.     0x000000003C8F27D5 (Mono JIT Code) [Logger.cs:41] UnityEngine.Logger:Log (UnityEngine.LogType,object)
11.     0x000000003C8F2016 (Mono JIT Code) [DebugBindings.gen.cs:103] UnityEngine.Debug:Log (object)
12.     0x00000000137EDA2B (Mono JIT Code) [PUNManagerStarter.cs:57] PUNManagerStarter:Update ()
13.     0x00000000008C7392 (Mono JIT Code) (wrapper runtime-invoke) object:runtime_invoke_void__this__ (object,intptr,intptr,intptr)
14.     0x00007FFD0CA55703 (mono) [mini.c:4937] mono_jit_runtime_invoke
15.     0x00007FFD0C9A8425 (mono) [object.c:2623] mono_runtime_invoke
16.     0x00000001410657E5 (Unity) scripting_method_invoke
17.     0x000000014105B461 (Unity) ScriptingInvocation::Invoke
18.     0x0000000141498F5B (Unity) MonoBehaviour::CallMethodIfAvailable
19.     0x000000014149D05F (Unity) MonoBehaviour::CallUpdateMethod
20.     0x0000000140AC4A86 (Unity) BaseBehaviourManager::CommonUpdate<BehaviourManager>
21.     0x0000000140AC567F (Unity) BehaviourManager::Update
22.     0x0000000140D74BC7 (Unity) PlayerLoop
23.     0x000000014171983E (Unity) Application::UpdateScene
24.     0x000000014171B00F (Unity) Application::UpdateSceneIfNeeded
25.     0x000000014172373A (Unity) Application::TickTimer
26.     0x00000001417EEA1C (Unity) CrashCallback
27.     0x00000001417F0664 (Unity) WinMain
28.     0x0000000141AD38E4 (Unity) strnlen
29.     0x00007FFD4A4A3034 (KERNEL32) BaseThreadInitThunk
30.     0x00007FFD4CF21431 (ntdll) RtlUserThreadStart

and:

Code (CSharp):

1.     var al = FindObjectOfType<AudioListener>();
2.     Debug.Log("**** " + al + " : " + al.name);

which returns:

Code (CSharp):

1. **** Head Target (UnityEngine.AudioListener) : Head Target
2.     0x000000014179D92B (Unity) StackWalker::GetCurrentCallstack
3.     0x000000014179F5DF (Unity) StackWalker::ShowCallstack
4.     0x00000001417796A0 (Unity) GetStacktrace
5.     0x0000000140D3F23B (Unity) DebugStringToFile
6.     0x0000000140D3FA1C (Unity) DebugStringToFile
7.     0x00000001413FE562 (Unity) DebugLogHandler_CUSTOM_Internal_Log
8.     0x000000003C8F2F5B (Mono JIT Code) (wrapper managed-to-native) UnityEngine.DebugLogHandler:Internal_Log (UnityEngine.LogType,string,UnityEngine.Object)
9.     0x000000003C8F2E44 (Mono JIT Code) [DebugLogHandler.cs:9] UnityEngine.DebugLogHandler:LogFormat (UnityEngine.LogType,UnityEngine.Object,string,object[])
10.     0x000000003C8F27D5 (Mono JIT Code) [Logger.cs:41] UnityEngine.Logger:Log (UnityEngine.LogType,object)
11.     0x000000003C8F2016 (Mono JIT Code) [DebugBindings.gen.cs:103] UnityEngine.Debug:Log (object)
12.     0x00000000137EDBF2 (Mono JIT Code) [PUNManagerStarter.cs:60] PUNManagerStarter:Update ()
13.     0x00000000008C7392 (Mono JIT Code) (wrapper runtime-invoke) object:runtime_invoke_void__this__ (object,intptr,intptr,intptr)
14.     0x00007FFD0CA55703 (mono) [mini.c:4937] mono_jit_runtime_invoke
15.     0x00007FFD0C9A8425 (mono) [object.c:2623] mono_runtime_invoke
16.     0x00000001410657E5 (Unity) scripting_method_invoke
17.     0x000000014105B461 (Unity) ScriptingInvocation::Invoke
18.     0x0000000141498F5B (Unity) MonoBehaviour::CallMethodIfAvailable
19.     0x000000014149D05F (Unity) MonoBehaviour::CallUpdateMethod
20.     0x0000000140AC4A86 (Unity) BaseBehaviourManager::CommonUpdate<BehaviourManager>
21.     0x0000000140AC567F (Unity) BehaviourManager::Update
22.     0x0000000140D74BC7 (Unity) PlayerLoop
23.     0x000000014171983E (Unity) Application::UpdateScene
24.     0x000000014171B00F (Unity) Application::UpdateSceneIfNeeded
25.     0x000000014172373A (Unity) Application::TickTimer
26.     0x00000001417EEA1C (Unity) CrashCallback
27.     0x00000001417F0664 (Unity) WinMain
28.     0x0000000141AD38E4 (Unity) strnlen
29.     0x00007FFD4A4A3034 (KERNEL32) BaseThreadInitThunk
30.     0x00007FFD4CF21431 (ntdll) RtlUserThreadStart

Any help about how to find the gameobject which instantiating AudioListener would be greatly appreciated.

Update 1: The AudioListener might be instantiated by the only camera in the scene, and that camera might come from an external library I am using called InstantVR. However, it happens the same as with the AudioLister component: I cannot find the script instantiating the camera. Using

Code (CSharp):

1. var cam = FindObjectOfType<Camera>();

I get:

Code (CSharp):

1. Headcam (UnityEngine.Camera) : Headcam

 

This answer on another thread tells you how to handle this.

 

Hi @Doug_B, I previously checked that post. I only detected one Camera in the scene, which I suppose is instantiating the AudioListener. In this application I am using the InstantVRlibrary, which I suppose renders the camera, but I cannot find the camera script either. This is all what I get when I search for the camera object: Headcam (UnityEngine.Camera) : Headcam.

 

In the application I was debugging, there was a combination of [HideInInspector], HideFlags.HideInHierarchy, and HideFlags.HideInInspector applied to some gameobjects and components from third-party libraries.

I found the required gameobjects and components using the following code, and checking the Hierarchy and the Inspector while the application was running:

Code (CSharp):

1.  
2.     void Update()
3.     {
4.         if (Input.GetKeyDown(KeyCode.Space))
5.         {
6.             GameObject[] foundObjects = FindObjectsOfType<GameObject>();
7.             Debug.Log("**** " + foundObjects + " : " + foundObjects.Length);
8.             var count = 0;
9.             if (foundObjects != null)
10.             {
11.                 foreach (GameObject foundObject in foundObjects)
12.                 {
13.                     count++;
14.                     if (foundObject.hideFlags == HideFlags.HideInHierarchy || foundObject.hideFlags == HideFlags.HideInInspector)
15.                     {
16.                         foundObject.hideFlags = HideFlags.None;
17.                         Debug.Log("**** foundObject: " + foundObject + " : foundObject Name: " + foundObject.name + " - Count: " + count);
18.                     }
19.                 }
20.             }
21.         }
22.     }

The hidden objects were then accessible from the Hierarchy. Hope it helps someone else.