diff --git a/LEGO1/mxaudiopresenter.cpp b/LEGO1/mxaudiopresenter.cpp
index bd6a5c87..fcb8c0ea 100644
--- a/LEGO1/mxaudiopresenter.cpp
+++ b/LEGO1/mxaudiopresenter.cpp
@@ -5,13 +5,13 @@
 DECOMP_SIZE_ASSERT(MxAudioPresenter, 0x54);
 
 // OFFSET: LEGO1 0x1000d260
-undefined4 MxAudioPresenter::vtable5c()
+MxU32 MxAudioPresenter::GetVolume()
 {
-	return this->m_unk50;
+	return m_volume;
 }
 
 // OFFSET: LEGO1 0x1000d270
-void MxAudioPresenter::vtable60(undefined4 p_unk50)
+void MxAudioPresenter::SetVolume(MxU32 p_volume)
 {
-	this->m_unk50 = p_unk50;
+	m_volume = p_volume;
 }
diff --git a/LEGO1/mxaudiopresenter.h b/LEGO1/mxaudiopresenter.h
index 717c8b4d..9fc92457 100644
--- a/LEGO1/mxaudiopresenter.h
+++ b/LEGO1/mxaudiopresenter.h
@@ -5,9 +5,10 @@
 #include "mxmediapresenter.h"
 
 // VTABLE 0x100d4c70
+// SIZE 0x54
 class MxAudioPresenter : public MxMediaPresenter {
 public:
-	MxAudioPresenter() { m_unk50 = 100; }
+	MxAudioPresenter() { m_volume = 100; }
 
 	// OFFSET: LEGO1 0x1000d280
 	inline virtual const char* ClassName() const override // vtable+0x0c
@@ -22,10 +23,11 @@ class MxAudioPresenter : public MxMediaPresenter {
 		return !strcmp(name, MxAudioPresenter::ClassName()) || MxMediaPresenter::IsA(name);
 	}
 
-	virtual undefined4 vtable5c();
-	virtual void vtable60(undefined4);
+	virtual MxU32 GetVolume();              // vtable+0x5c
+	virtual void SetVolume(MxU32 p_volume); // vtable+0x60
 
-	undefined4 m_unk50;
+private:
+	MxU32 m_volume;
 };
 
 #endif // MXAUDIOPRESENTER_H
diff --git a/LEGO1/mxbackgroundaudiomanager.cpp b/LEGO1/mxbackgroundaudiomanager.cpp
index 26d399f7..2099cbc4 100644
--- a/LEGO1/mxbackgroundaudiomanager.cpp
+++ b/LEGO1/mxbackgroundaudiomanager.cpp
@@ -159,7 +159,7 @@ void MxBackgroundAudioManager::StartAction(MxParam& p)
 	m_action2.SetAtomId(m_unk138->GetAction()->GetAtomId());
 	m_action2.SetObjectId(m_unk138->GetAction()->GetObjectId());
 	m_targetVolume = ((MxDSSound*) (m_unk138->GetAction()))->GetVolume();
-	m_unk138->vtable60(0);
+	m_unk138->SetVolume(0);
 }
 
 // OFFSET: LEGO1 0x1007f200
@@ -257,15 +257,15 @@ void MxBackgroundAudioManager::FUN_1007ef40()
 			if (m_unk148 == 0) {
 				compare = m_unk148;
 			}
-			volume = m_unk138->vtable5c();
+			volume = m_unk138->GetVolume();
 			if (volume < compare) {
-				if (m_unk140 + m_unk138->vtable5c() <= compare) {
+				if (m_unk140 + m_unk138->GetVolume() <= compare) {
 					compare = m_unk140 + compare;
 				}
-				m_unk138->vtable60(compare);
+				m_unk138->SetVolume(compare);
 			}
 			else {
-				m_unk138->vtable60(compare);
+				m_unk138->SetVolume(compare);
 				m_unka0 = m_unk138;
 				m_action1 = m_action2;
 				m_unk138 = NULL;
@@ -276,16 +276,16 @@ void MxBackgroundAudioManager::FUN_1007ef40()
 		}
 	}
 	else if (m_unka0->GetAction() != NULL) {
-		if (m_unka0->vtable5c() == 0) {
+		if (m_unka0->GetVolume() == 0) {
 			DeleteObject(*m_unka0->GetAction());
 		}
 		else {
-			compare = m_unka0->vtable5c();
+			compare = m_unka0->GetVolume();
 			volume = 0;
 			if (compare != m_unk140 && -1 < compare - m_unk140) {
-				volume = m_unka0->vtable5c() - m_unk140;
+				volume = m_unka0->GetVolume() - m_unk140;
 			}
-			m_unk138->vtable60(volume);
+			m_unk138->SetVolume(volume);
 		}
 	}
 }
@@ -295,7 +295,7 @@ void MxBackgroundAudioManager::FadeInOrFadeOut()
 {
 	// This function probably is the fade in/out routine
 	if (m_unka0 != NULL) {
-		undefined4 volume = m_unka0->vtable5c();
+		undefined4 volume = m_unka0->GetVolume();
 		MxU32 compare = 30;
 		if (m_unk148 == 0) {
 			compare = m_targetVolume;
@@ -306,17 +306,17 @@ void MxBackgroundAudioManager::FadeInOrFadeOut()
 			if (compare <= volume) {
 				volume = compare;
 			}
-			m_unka0->vtable60(volume);
+			m_unka0->SetVolume(volume);
 		}
 		else if (compare < volume) {
 			volume = volume - m_unk140;
 			if (volume <= compare) {
 				volume = compare;
 			}
-			m_unka0->vtable60(volume);
+			m_unka0->SetVolume(volume);
 		}
 		else {
-			m_unka0->vtable60(volume);
+			m_unka0->SetVolume(volume);
 			m_unk13c = 0;
 		}
 	}
diff --git a/LEGO1/mxmidipresenter.cpp b/LEGO1/mxmidipresenter.cpp
index 59e30fa3..37b6ea9c 100644
--- a/LEGO1/mxmidipresenter.cpp
+++ b/LEGO1/mxmidipresenter.cpp
@@ -6,6 +6,13 @@
 
 DECOMP_SIZE_ASSERT(MxMIDIPresenter, 0x58);
 
+// OFFSET: LEGO1 0x100c25a0 STUB
+MxResult MxMIDIPresenter::AddToManager()
+{
+	// TODO
+	return SUCCESS;
+}
+
 // OFFSET: LEGO1 0x100c25e0
 MxMIDIPresenter::MxMIDIPresenter()
 {
@@ -30,10 +37,46 @@ void MxMIDIPresenter::Destroy(MxBool p_fromDestructor)
 	// TODO
 }
 
+// OFFSET: LEGO1 0x100c2890 STUB
+void MxMIDIPresenter::ReadyTickle()
+{
+	// TODO
+}
+
+// OFFSET: LEGO1 0x100c28d0 STUB
+void MxMIDIPresenter::StartingTickle()
+{
+	// TODO
+}
+
+// OFFSET: LEGO1 0x100c2910 STUB
+void MxMIDIPresenter::StreamingTickle()
+{
+	// TODO
+}
+
 // OFFSET: LEGO1 0x100c2940
 void MxMIDIPresenter::DoneTickle()
 {
-	if (!MusicManager()->GetMIDIInitialized()) {
-		this->EndAction();
-	}
+	if (!MusicManager()->GetMIDIInitialized())
+		EndAction();
+}
+
+// OFFSET: LEGO1 0x100c2960 STUB
+void MxMIDIPresenter::Destroy()
+{
+	// TODO
+}
+
+// OFFSET: LEGO1 0x100c2970 STUB
+undefined4 MxMIDIPresenter::PutData()
+{
+	// TODO
+	return 0;
+}
+
+// OFFSET: LEGO1 0x100c29e0 STUB
+void MxMIDIPresenter::EndAction()
+{
+	// TODO
 }
diff --git a/LEGO1/mxmidipresenter.h b/LEGO1/mxmidipresenter.h
index 675f79b5..245adb34 100644
--- a/LEGO1/mxmidipresenter.h
+++ b/LEGO1/mxmidipresenter.h
@@ -4,6 +4,7 @@
 #include "mxmusicpresenter.h"
 
 // VTABLE 0x100dca20
+// SIZE 0x58
 class MxMIDIPresenter : public MxMusicPresenter {
 public:
 	MxMIDIPresenter();
@@ -22,11 +23,18 @@ class MxMIDIPresenter : public MxMusicPresenter {
 		return !strcmp(name, MxMIDIPresenter::ClassName()) || MxMusicPresenter::IsA(name);
 	}
 
-	virtual void DoneTickle() override; // vtable+0x2c
+	virtual void ReadyTickle() override;      // vtable+0x18
+	virtual void StartingTickle() override;   // vtable+0x1c
+	virtual void StreamingTickle() override;  // vtable+0x20
+	virtual void DoneTickle() override;       // vtable+0x2c
+	virtual MxResult AddToManager() override; // vtable+0x34
+	virtual void Destroy() override;          // vtable+0x38
+	virtual void EndAction() override;        // vtable+0x40
+	virtual undefined4 PutData() override;    // vtable+0x4c
 
 private:
 	void Init();
-	void Destroy(MxBool);
+	void Destroy(MxBool p_fromDestructor);
 
 	undefined4 m_unk54;
 };
diff --git a/LEGO1/mxmusicpresenter.h b/LEGO1/mxmusicpresenter.h
index 02edf1a5..2f96d64e 100644
--- a/LEGO1/mxmusicpresenter.h
+++ b/LEGO1/mxmusicpresenter.h
@@ -7,6 +7,9 @@
 // SIZE 0x54
 class MxMusicPresenter : public MxAudioPresenter {
 public:
+	MxMusicPresenter();
+	virtual ~MxMusicPresenter() override;
+
 	// OFFSET: LEGO1 0x100c23a0
 	inline virtual const char* ClassName() const override // vtable+0xc
 	{
@@ -20,9 +23,6 @@ class MxMusicPresenter : public MxAudioPresenter {
 		return !strcmp(name, MxMusicPresenter::ClassName()) || MxAudioPresenter::IsA(name);
 	}
 
-	MxMusicPresenter();
-	virtual ~MxMusicPresenter() override;
-
 	virtual MxResult AddToManager() override; // vtable+0x34
 	virtual void Destroy() override;          // vtable+0x38
 
diff --git a/LEGO1/mxsoundmanager.cpp b/LEGO1/mxsoundmanager.cpp
index a57672d3..8e32345e 100644
--- a/LEGO1/mxsoundmanager.cpp
+++ b/LEGO1/mxsoundmanager.cpp
@@ -145,7 +145,7 @@ void MxSoundManager::SetVolume(MxS32 p_volume)
 	MxPresenterListCursor cursor(m_presenters);
 
 	while (cursor.Next(presenter))
-		((MxAudioPresenter*) presenter)->vtable60(((MxAudioPresenter*) presenter)->vtable5c());
+		((MxAudioPresenter*) presenter)->SetVolume(((MxAudioPresenter*) presenter)->GetVolume());
 
 	m_criticalSection.Leave();
 }
diff --git a/LEGO1/mxsoundpresenter.cpp b/LEGO1/mxsoundpresenter.cpp
index 3935a97c..540dcbac 100644
--- a/LEGO1/mxsoundpresenter.cpp
+++ b/LEGO1/mxsoundpresenter.cpp
@@ -11,6 +11,12 @@ MxSoundPresenter::~MxSoundPresenter()
 	Destroy(TRUE);
 }
 
+// OFFSET: LEGO1 0x1000d490
+void MxSoundPresenter::Destroy()
+{
+	Destroy(FALSE);
+}
+
 // OFFSET: LEGO1 0x100b1a50
 void MxSoundPresenter::Destroy(MxBool p_fromDestructor)
 {
@@ -37,9 +43,3 @@ MxResult MxSoundPresenter::AddToManager()
 
 	return ret;
 }
-
-// OFFSET: LEGO1 0x1000d490
-void MxSoundPresenter::Destroy()
-{
-	Destroy(FALSE);
-}
diff --git a/LEGO1/mxsoundpresenter.h b/LEGO1/mxsoundpresenter.h
index 57997646..408dbe88 100644
--- a/LEGO1/mxsoundpresenter.h
+++ b/LEGO1/mxsoundpresenter.h
@@ -5,6 +5,7 @@
 #include "mxomni.h"
 
 // VTABLE 0x100d4b08
+// SIZE 0x54
 class MxSoundPresenter : public MxAudioPresenter {
 public:
 	virtual ~MxSoundPresenter() override;
@@ -26,7 +27,7 @@ class MxSoundPresenter : public MxAudioPresenter {
 	virtual void Destroy() override;          // vtable+0x38
 
 private:
-	void Destroy(MxBool);
+	void Destroy(MxBool p_fromDestructor);
 };
 
 #endif // MXSOUNDPRESENTER_H