The main menu music would not start again when you returned to the main menu.

include/Engine/Sound/SoundManager.h

@@ -30,6 +30,7 @@
 #include "../Engine/Core/EPause.h"
 #include "../Engine/Core/EComponentAttached.h"
 #include "../Core/EPlayerSpawned.h"
+#include "../Engine/Network/EPlayerDisconnected.h"
 
 
 typedef std::pair<ALuint, std::vector<ALuint>> QueuedBuffers;
@@ -139,6 +140,8 @@ private:
     bool OnPlayQueueOnEntity(const Events::PlayQueueOnEntity &e);
     EventRelay<SoundManager, Events::ChangeBGM> m_EChangeBGM;
     bool OnChangeBGM(const Events::ChangeBGM &e);
+    EventRelay<SoundManager, Events::PlayerDisconnected> m_EplayerDisconnected;
+    bool OnPlayerDisconnected(const Events::PlayerDisconnected& e);
 
 
 };

src/Engine/Sound/SoundManager.cpp

@@ -30,6 +30,7 @@ SoundManager::SoundManager(World* world, EventBroker* eventBroker)
     EVENT_SUBSCRIBE_MEMBER(m_EPlayerSpawned, &SoundManager::OnPlayerSpawned);
     EVENT_SUBSCRIBE_MEMBER(m_EPlayQueueOnEntity, &SoundManager::OnPlayQueueOnEntity);
     EVENT_SUBSCRIBE_MEMBER(m_EChangeBGM, &SoundManager::OnChangeBGM);
+    EVENT_SUBSCRIBE_MEMBER(m_EplayerDisconnected, &SoundManager::OnPlayerDisconnected);
 
     Events::ChangeBGM e;
     e.FilePath = "Audio/bgm/MenuMusic.wav";
@@ -394,7 +395,9 @@ bool SoundManager::OnPlayQueueOnEntity(const Events::PlayQueueOnEntity &e)
 bool SoundManager::OnChangeBGM(const Events::ChangeBGM &e)
 {
     if (m_CurrentBGM != nullptr) {
-        stopSound(m_CurrentBGM);
+        if (getSourceState(m_CurrentBGM->ALsource) == AL_PLAYING) {
+            stopSound(m_CurrentBGM);
+        }
     }
     m_CurrentBGM = createSource(e.FilePath);
     m_CurrentBGM->Type = SoundType::BGM;
@@ -403,6 +406,22 @@ bool SoundManager::OnChangeBGM(const Events::ChangeBGM &e)
     return true;
 }
 
+
+bool SoundManager::OnPlayerDisconnected(const Events::PlayerDisconnected& e)
+{
+    // A player returned to the main menu. Easiest solution when we don't have states in the game. Not "PC".
+    if (m_CurrentBGMCombo != nullptr) {
+        if (getSourceState(m_CurrentBGMCombo->ALsource) == AL_PLAYING) {
+            stopSound(m_CurrentBGMCombo);
+        }
+    }
+    stopSound(m_CurrentBGMCombo);
+    Events::ChangeBGM changeBGM;
+    changeBGM.FilePath = "Audio/BGM/MenuMusic.wav";
+    m_EventBroker->Publish(changeBGM);
+    return true;
+}
+
 ALenum SoundManager::getSourceState(ALuint source)
 {
     ALenum state;