diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2034c28a..1eb41a6d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -132,6 +132,7 @@ add_library(lego1 SHARED
   LEGO1/mxloopingmidipresenter.cpp
   LEGO1/mxloopingsmkpresenter.cpp
   LEGO1/mxmatrix.cpp
+  LEGO1/mxmediamanager.cpp
   LEGO1/mxmediapresenter.cpp
   LEGO1/mxmidipresenter.cpp
   LEGO1/mxmusicpresenter.cpp
@@ -156,7 +157,6 @@ add_library(lego1 SHARED
   LEGO1/mxticklemanager.cpp
   LEGO1/mxtimer.cpp
   LEGO1/mxtransitionmanager.cpp
-  LEGO1/mxunknown100dc6b0.cpp
   LEGO1/mxunknown100dc6e0.cpp
   LEGO1/mxvariable.cpp
   LEGO1/mxvariabletable.cpp
diff --git a/LEGO1/mxeventmanager.h b/LEGO1/mxeventmanager.h
index 1fe7daeb..cb89f637 100644
--- a/LEGO1/mxeventmanager.h
+++ b/LEGO1/mxeventmanager.h
@@ -1,11 +1,11 @@
 #ifndef MXEVENTMANAGER_H
 #define MXEVENTMANAGER_H
 
-#include "mxunknown100dc6b0.h"
+#include "mxmediamanager.h"
 
 // VTABLE 0x100dc900
 // SIZE 0x2c
-class MxEventManager : public MxUnknown100dc6b0
+class MxEventManager : public MxMediaManager
 {
 public:
   MxEventManager();
diff --git a/LEGO1/mxmediamanager.cpp b/LEGO1/mxmediamanager.cpp
new file mode 100644
index 00000000..a6c8a9c0
--- /dev/null
+++ b/LEGO1/mxmediamanager.cpp
@@ -0,0 +1,33 @@
+#include "mxmediamanager.h"
+#include "decomp.h"
+
+DECOMP_SIZE_ASSERT(MxMediaManager, 0x2c);
+
+// OFFSET: LEGO1 0x100b84c0
+MxMediaManager::MxMediaManager()
+{
+  Init();
+}
+
+// OFFSET: LEGO1 0x100b8560
+MxMediaManager::~MxMediaManager()
+{
+  Teardown();
+}
+
+// OFFSET: LEGO1 0x100b85d0
+MxResult MxMediaManager::Init()
+{
+  this->m_unk08 = NULL;
+  this->m_thread = NULL;
+  return SUCCESS;
+}
+
+// OFFSET: LEGO1 0x100b8710
+void MxMediaManager::Teardown()
+{
+  if(this->m_unk08) {
+    delete this->m_unk08;
+  }
+  Init();
+}
\ No newline at end of file
diff --git a/LEGO1/mxmediamanager.h b/LEGO1/mxmediamanager.h
new file mode 100644
index 00000000..76af63fb
--- /dev/null
+++ b/LEGO1/mxmediamanager.h
@@ -0,0 +1,26 @@
+#ifndef MXMEDIAMANGER_H
+#define MXMEDIAMANGER_H
+
+#include "mxcore.h"
+#include "mxcriticalsection.h"
+#include "mxthread.h"
+#include "mxtypes.h"
+
+// VTABLE 0x100dc6b0
+class MxMediaManager : public MxCore
+{
+public:
+  MxMediaManager();
+  virtual ~MxMediaManager() override;
+
+  MxResult Init();
+  void Teardown();
+private:
+  void* m_unk08;
+  MxThread* m_thread; // 0xc
+
+protected:
+  MxCriticalSection m_criticalSection; // 0x10
+};
+
+#endif // MXMEDIAMANGER_H
diff --git a/LEGO1/mxunknown100dc6b0.cpp b/LEGO1/mxunknown100dc6b0.cpp
deleted file mode 100644
index b896fa10..00000000
--- a/LEGO1/mxunknown100dc6b0.cpp
+++ /dev/null
@@ -1,21 +0,0 @@
-#include "mxunknown100dc6b0.h"
-
-// OFFSET: LEGO1 0x100b84c0
-MxUnknown100dc6b0::MxUnknown100dc6b0()
-{
-  Init();
-}
-
-// OFFSET: LEGO1 0x100b8560 STUB
-MxUnknown100dc6b0::~MxUnknown100dc6b0()
-{
-  // TODO
-}
-
-// OFFSET: LEGO1 0x100b85d0
-MxResult MxUnknown100dc6b0::Init()
-{
-  this->m_unk08 = 0;
-  this->m_unk0c = 0;
-  return SUCCESS;
-}
diff --git a/LEGO1/mxunknown100dc6b0.h b/LEGO1/mxunknown100dc6b0.h
deleted file mode 100644
index 29d42209..00000000
--- a/LEGO1/mxunknown100dc6b0.h
+++ /dev/null
@@ -1,25 +0,0 @@
-#ifndef MXUNKNOWN100DC6B0_H
-#define MXUNKNOWN100DC6B0_H
-
-#include "mxcore.h"
-#include "mxcriticalsection.h"
-#include "mxtypes.h"
-
-// VTABLE 0x100dc6b0
-class MxUnknown100dc6b0 : public MxCore
-{
-public:
-  MxUnknown100dc6b0();
-  virtual ~MxUnknown100dc6b0() override;
-
-  MxResult Init();
-
-private:
-  int m_unk08;
-  int m_unk0c;
-
-protected:
-  MxCriticalSection m_criticalSection;
-};
-
-#endif // MXUNKNOWN100DC6B0_H
diff --git a/LEGO1/mxunknown100dc6e0.h b/LEGO1/mxunknown100dc6e0.h
index 79c63bab..056e1fcd 100644
--- a/LEGO1/mxunknown100dc6e0.h
+++ b/LEGO1/mxunknown100dc6e0.h
@@ -1,10 +1,10 @@
 #ifndef MXUNKNOWN100DC6E0_H
 #define MXUNKNOWN100DC6E0_H
 
-#include "mxunknown100dc6b0.h"
+#include "mxmediamanager.h"
 
 // VTABLE 0x100dc6e0
-class MxUnknown100dc6e0 : public MxUnknown100dc6b0
+class MxUnknown100dc6e0 : public MxMediaManager
 {
 public:
   MxUnknown100dc6e0();
diff --git a/LEGO1/mxvideomanager.h b/LEGO1/mxvideomanager.h
index 34511885..03eac8aa 100644
--- a/LEGO1/mxvideomanager.h
+++ b/LEGO1/mxvideomanager.h
@@ -1,13 +1,13 @@
 #ifndef MXVIDEOMANAGER_H
 #define MXVIDEOMANAGER_H
 
-#include "mxunknown100dc6b0.h"
 #include "mxdisplaysurface.h"
+#include "mxmediamanager.h"
 #include "mxvideoparam.h"
 
 // VTABLE 0x100dc810
 // SIZE 0x64
-class MxVideoManager : public MxUnknown100dc6b0
+class MxVideoManager : public MxMediaManager
 {
 public:
   virtual ~MxVideoManager();