diff --git a/include/Inagaki/GameAudioMain.h b/include/Inagaki/GameAudioMain.h
index ac4a639d..00284341 100644
--- a/include/Inagaki/GameAudioMain.h
+++ b/include/Inagaki/GameAudioMain.h
@@ -123,7 +123,8 @@ class Main
     JAISoundHandle _24[4];        //
     JAISoundHandle _34[4];        //
     FxLineConfig *mConfig;        // 44
-    u8 _48[4];                    //
+    u8 mState;                    // 48
+    u8 _padding[3];               //
     PAUSE_STATUS mPauseStatus;    // 4C
     int _50;                      //
     u8 _54[0x64 - 0x54];          //
diff --git a/src/Inagaki/GameAudioMain.cpp b/src/Inagaki/GameAudioMain.cpp
index ea46d5d2..318ac730 100644
--- a/src/Inagaki/GameAudioMain.cpp
+++ b/src/Inagaki/GameAudioMain.cpp
@@ -1,5 +1,8 @@
 #include "Inagaki/GameAudioMain.h"
-#include "Inagaki/GameMapSoundMgr.h"
+
+#include "JSystem/JAudio/System/JASAudioThread.h"
+#include "JSystem/JAudio/System/JASWaveArcLoader.h"
+#include "JSystem/JAudio/System/JASWaveBank.h"
 
 namespace GameAudio {
 
@@ -12,9 +15,13 @@ Main::Main() {
 
 void Main::init(JKRSolidHeap *, u32, void *, void *, u32) {}
 
-void Main::bootDSP() {}
+void Main::bootDSP() {
+    JASAudioThread::bootDSP();
+}
 
-bool Main::isActive() {}
+bool Main::isActive() {
+    return mState & 0x10;
+}
 
 void Main::initRaceSound() {}
 
@@ -24,7 +31,23 @@ void Main::changeSection(u32) {}
 
 void Main::checkSection() {}
 
-bool Main::isWaveLoaded(WS_ID) {}
+bool Main::isWaveLoaded(WS_ID id) {
+    JAUSectionHeap* sectionHeap = JASGlobalInstance<JAUSectionHeap>::sInstance;
+    if(sectionHeap != nullptr)
+    {
+        JASWaveBank* bank = sectionHeap->sectionHeapData_.waveBankTable.getWaveBank(id);
+
+        if(bank != nullptr)
+        {
+            JASWaveArc* arc = bank->getWaveArc(0);
+            if (arc->_4c == 2) {
+                return true;
+            }
+        }
+    }
+
+    return false;
+}
 
 void Main::checkCourceOnRace() {}