diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0da82a25..818d3773 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -140,6 +140,7 @@ add_library(lego1 SHARED
   LEGO1/mxmatrix.cpp
   LEGO1/mxmediamanager.cpp
   LEGO1/mxmediapresenter.cpp
+  LEGO1/mxmidimanager.cpp
   LEGO1/mxmidipresenter.cpp
   LEGO1/mxmusicpresenter.cpp
   LEGO1/mxnotificationmanager.cpp
@@ -272,4 +273,4 @@ if (MSVC)
   set(CMAKE_SHARED_LINKER_FLAGS_RELEASE "/incremental:no")
   set(CMAKE_SHARED_LINKER_FLAGS_RELWITHDEBINFO "/incremental:no /debug")
   set(CMAKE_SHARED_LINKER_FLAGS_MINSIZEREL "/incremental:no")
-endif()
\ No newline at end of file
+endif()
diff --git a/LEGO1/mxaudiomanager.cpp b/LEGO1/mxaudiomanager.cpp
index c7ecdc12..bb358e47 100644
--- a/LEGO1/mxaudiomanager.cpp
+++ b/LEGO1/mxaudiomanager.cpp
@@ -20,7 +20,21 @@ MxAudioManager::~MxAudioManager()
 // OFFSET: LEGO1 0x100b8df0
 void MxAudioManager::Init()
 {
-  this->m_unk2c = 100;
+  this->m_volume = 100;
+}
+
+// OFFSET: LEGO1 0x10029910
+MxS32 MxAudioManager::GetVolume()
+{
+  return this->m_volume;
+}
+
+// OFFSET: LEGO1 0x100b8ea0
+void MxAudioManager::SetVolume(MxS32 p_volume)
+{
+  this->m_criticalSection.Enter();
+  this->m_volume = p_volume;
+  this->m_criticalSection.Leave();
 }
 
 // OFFSET: LEGO1 0x100b8e00
diff --git a/LEGO1/mxaudiomanager.h b/LEGO1/mxaudiomanager.h
index 1403f36d..1ba5b6fd 100644
--- a/LEGO1/mxaudiomanager.h
+++ b/LEGO1/mxaudiomanager.h
@@ -11,18 +11,20 @@ class MxAudioManager : public MxMediaManager
   MxAudioManager();
   virtual ~MxAudioManager() override;
 
-  virtual MxResult InitPresenters(); // vtable+14
-  virtual void Destroy(); // vtable+18
+  virtual MxResult InitPresenters() override; // vtable+14
+  virtual void Destroy() override; // vtable+18
+  virtual MxS32 GetVolume(); // vtable+28
+  virtual void SetVolume(MxS32 p_volume); // vtable+2c
 
 private:
-  void LockedReinitialize(MxBool);
+  void LockedReinitialize(MxBool p_skipDestroy);
 
   static MxS32 g_unkCount;
 
 protected:
   void Init();
 
-  undefined4 m_unk2c;
+  MxS32 m_volume; // 0x2c
 };
 
 #endif // MXAUDIOMANAGER_H
diff --git a/LEGO1/mxmidimanager.cpp b/LEGO1/mxmidimanager.cpp
new file mode 100644
index 00000000..62bcb6d2
--- /dev/null
+++ b/LEGO1/mxmidimanager.cpp
@@ -0,0 +1,161 @@
+#include "mxmidimanager.h"
+#include "mxomni.h"
+#include <windows.h>
+
+DECOMP_SIZE_ASSERT(MxMIDIManager, 0x58);
+
+// OFFSET: LEGO1 0x100c05a0
+MxMIDIManager::MxMIDIManager()
+{
+  Init();
+}
+
+// OFFSET: LEGO1 0x100c0630
+MxMIDIManager::~MxMIDIManager()
+{
+  LockedReinitialize(TRUE);
+}
+
+// OFFSET: LEGO1 0x100c0b20
+void MxMIDIManager::DeinitializeMIDI()
+{
+  m_criticalSection.Enter();
+
+  if (this->m_MIDIInitialized)
+  {
+    this->m_MIDIInitialized = FALSE;
+    midiStreamStop(this->m_MIDIStreamH);
+    midiOutUnprepareHeader(this->m_MIDIStreamH, this->m_MIDIHdrP, sizeof(MIDIHDR));
+    midiOutSetVolume(this->m_MIDIStreamH, this->m_MIDIVolume);
+    midiStreamClose(this->m_MIDIStreamH);
+    delete this->m_MIDIHdrP;
+    this->InitData();
+  }
+
+  this->m_criticalSection.Leave();
+}
+
+// OFFSET: LEGO1 0x100c0690
+void MxMIDIManager::Init()
+{
+  this->m_multiplier = 100;
+  InitData();
+}
+
+// OFFSET: LEGO1 0x100c06a0
+void MxMIDIManager::InitData()
+{
+  this->m_MIDIStreamH = 0;
+  this->m_MIDIInitialized = FALSE;
+  this->m_unk38 = 0;
+  this->m_unk3c = 0;
+  this->m_unk40 = 0;
+  this->m_unk44 = 0;
+  this->m_unk48 = 0;
+  this->m_MIDIHdrP = NULL;
+}
+
+// OFFSET: LEGO1 0x100c06c0
+void MxMIDIManager::LockedReinitialize(MxBool p_skipDestroy)
+{
+  if (this->m_thread)
+  {
+    this->m_thread->Terminate();
+    if (this->m_thread)
+    {
+      delete m_thread;
+    }
+  }
+  else
+  {
+    TickleManager()->UnregisterClient(this);
+  }
+
+  this->m_criticalSection.Enter();
+  DeinitializeMIDI();
+  Init();
+  this->m_criticalSection.Leave();
+
+  if (!p_skipDestroy)
+  {
+    MxAudioManager::Destroy();
+  }
+}
+
+// OFFSET: LEGO1 0x100c0930
+void MxMIDIManager::Destroy()
+{
+  LockedReinitialize(FALSE);
+}
+
+// OFFSET: LEGO1 0x100c09a0
+MxS32 MxMIDIManager::CalculateVolume(MxS32 p_volume)
+{
+  MxS32 result = (p_volume * 0xffff) / 100;
+  return (result << 0x10) | result;
+}
+
+// OFFSET: LEGO1 0x100c07f0
+void MxMIDIManager::SetMIDIVolume()
+{
+  MxS32 result = (this->m_volume * this->m_multiplier) / 0x64;
+  HMIDISTRM streamHandle = this->m_MIDIStreamH;
+
+  if (streamHandle)
+  {
+    MxS32 volume = CalculateVolume(result);
+    midiOutSetVolume(streamHandle, volume);
+  }
+}
+
+// OFFSET: LEGO1 0x100c0940
+void MxMIDIManager::SetVolume(MxS32 p_volume)
+{
+  MxAudioManager::SetVolume(p_volume);
+  this->m_criticalSection.Enter();
+  SetMIDIVolume();
+  this->m_criticalSection.Leave();
+}
+
+// OFFSET: LEGO1 0x100c0840
+MxResult MxMIDIManager::StartMIDIThread(MxU32 p_frequencyMS, MxBool p_noRegister)
+{
+  MxResult status = FAILURE;
+  MxBool locked = FALSE;
+
+  MxResult result = MxAudioManager::InitPresenters();
+  if (result == SUCCESS)
+  {
+    if (p_noRegister)
+    {
+      this->m_criticalSection.Enter();
+      locked = TRUE;
+      this->m_thread = new MxTickleThread(this, p_frequencyMS);
+
+      if (this->m_thread)
+      {
+        if (this->m_thread->Start(0, 0) == SUCCESS)
+        {
+          status = SUCCESS;
+        }
+      }
+    }
+    else
+    {
+      TickleManager()->RegisterClient(this, p_frequencyMS);
+      status = SUCCESS;
+    }
+  }
+
+  if (status != SUCCESS)
+  {
+    Destroy();
+  }
+
+  if (locked)
+  {
+    this->m_criticalSection.Leave();
+  }
+
+  return status;
+}
\ No newline at end of file
diff --git a/LEGO1/mxmidimanager.h b/LEGO1/mxmidimanager.h
new file mode 100644
index 00000000..f944d67d
--- /dev/null
+++ b/LEGO1/mxmidimanager.h
@@ -0,0 +1,42 @@
+#ifndef MXMIDIMANAGER_H
+#define MXMIDIMANAGER_H
+
+#include "decomp.h"
+#include "mxaudiomanager.h"
+
+// VTABLE 0x100dc930
+// SIZE 0x58
+class MxMIDIManager : public MxAudioManager
+{
+public:
+  MxMIDIManager();
+  virtual ~MxMIDIManager() override;
+
+  virtual void Destroy() override; // vtable+18
+  virtual void SetVolume(MxS32 p_volume) override; // vtable+2c
+  virtual MxResult StartMIDIThread(MxU32 p_frequencyMS, MxU8 p_noRegister); // vtable+30
+
+private:
+  void LockedReinitialize(MxBool p_skipDestroy);
+  void DeinitializeMIDI();
+
+  MxS32 CalculateVolume(MxS32 p_volume);
+  void SetMIDIVolume();
+
+  HMIDISTRM m_MIDIStreamH;  // 0x30
+  MxBool m_MIDIInitialized; // 0x34
+  undefined4 m_unk38;       // 0x38
+  undefined4 m_unk3c;       // 0x3c
+  undefined4 m_unk40;       // 0x40
+  undefined4 m_unk44;       // 0x44
+  undefined4 m_unk48;       // 0x48
+  MIDIHDR *m_MIDIHdrP;      // 0x4c
+  MxS32 m_multiplier;       // 0x50
+  DWORD m_MIDIVolume;       // 0x54
+
+protected:
+  void Init();
+  void InitData();
+};
+
+#endif // MXMIDIMANAGER_H
\ No newline at end of file