diff --git a/Aerofoil/Aerofoil.vcxproj b/Aerofoil/Aerofoil.vcxproj
index 9a46344..3307793 100644
--- a/Aerofoil/Aerofoil.vcxproj
+++ b/Aerofoil/Aerofoil.vcxproj
@@ -103,6 +103,8 @@
     <ClInclude Include="..\GpCommon\GpDisplayDriverTickStatus.h" />
     <ClInclude Include="..\GpCommon\GpFileCreationDisposition.h" />
     <ClInclude Include="..\GpCommon\GpInputDriverProperties.h" />
+    <ClInclude Include="..\GpCommon\GpString.h" />
+    <ClInclude Include="..\GpCommon\GpVector.h" />
     <ClInclude Include="..\GpCommon\IGpCursor.h" />
     <ClInclude Include="..\GpCommon\IGpAudioChannelCallbacks.h" />
     <ClInclude Include="..\GpCommon\IGpDisplayDriverSurface.h" />
diff --git a/Aerofoil/Aerofoil.vcxproj.filters b/Aerofoil/Aerofoil.vcxproj.filters
index 6e8d027..6c42a88 100644
--- a/Aerofoil/Aerofoil.vcxproj.filters
+++ b/Aerofoil/Aerofoil.vcxproj.filters
@@ -93,6 +93,12 @@
     <ClInclude Include="GpBWCursor_Win32.h">
       <Filter>Header Files</Filter>
     </ClInclude>
+    <ClInclude Include="..\GpCommon\GpVector.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
+    <ClInclude Include="..\GpCommon\GpString.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <Image Include="ConvertedResources\Large128.ico">
diff --git a/Aerofoil/GpFileSystem_Win32.cpp b/Aerofoil/GpFileSystem_Win32.cpp
index 485fbcc..14e98ed 100644
--- a/Aerofoil/GpFileSystem_Win32.cpp
+++ b/Aerofoil/GpFileSystem_Win32.cpp
@@ -7,7 +7,7 @@
 #include "IGpAllocator.h"
 #include "IGpDirectoryCursor.h"
 
-#include <string>
+
 #include <Shlwapi.h>
 #include <ShlObj.h>
 #include <commdlg.h>
@@ -105,49 +105,70 @@ GpDirectoryCursor_Win32::~GpDirectoryCursor_Win32()
 	FindClose(m_handle);
 }
 
-GpFileSystem_Win32::GpFileSystem_Win32()
-	: m_alloc(GpAllocator_C::GetInstance())
+GpFileSystem_Win32::GpFileSystem_Win32(IGpAllocator *alloc)
+	: m_alloc(alloc)
+	, m_prefsDir(alloc)
+	, m_scoresDir(alloc)
+	, m_packagedDir(alloc)
+	, m_housesDir(alloc)
+	, m_logsDir(alloc)
+	, m_userHousesDir(alloc)
+	, m_userSavesDir(alloc)
+	, m_resourcesDir(alloc)
 {
-	// GP TODO: This shouldn't be static init since it allocates memory
 	m_executablePath[0] = 0;
+}
 
+void GpFileSystem_Win32::Destroy()
+{
+	IGpAllocator *alloc = m_alloc;
+	this->~GpFileSystem_Win32();
+	alloc->Release(this);
+}
+
+bool GpFileSystem_Win32::Init()
+{
 	PWSTR docsPath;
-	if (!FAILED(SHGetKnownFolderPath(FOLDERID_Documents, KF_FLAG_DEFAULT, nullptr, &docsPath)))
+	if (FAILED(SHGetKnownFolderPath(FOLDERID_Documents, KF_FLAG_DEFAULT, nullptr, &docsPath)))
+		return false;
+
+	if (!m_prefsDir.Set(docsPath))
 	{
-		try
-		{
-			m_prefsDir = docsPath;
-		}
-		catch(...)
-		{
-			CoTaskMemFree(docsPath);
-			throw;
-		}
-
-		m_prefsDir.append(L"\\" GP_APPLICATION_NAME_W);
-
-		m_userHousesDir = m_prefsDir + L"\\Houses";
-		m_userSavesDir = m_prefsDir + L"\\SavedGames";
-		m_scoresDir = m_prefsDir + L"\\Scores";
-		m_logsDir = m_prefsDir + L"\\Logs";
-		m_fontCacheDir = m_prefsDir + L"\\FontCache";
-
-		CreateDirectoryW(m_prefsDir.c_str(), nullptr);
-		CreateDirectoryW(m_scoresDir.c_str(), nullptr);
-		CreateDirectoryW(m_userHousesDir.c_str(), nullptr);
-		CreateDirectoryW(m_userSavesDir.c_str(), nullptr);
-		CreateDirectoryW(m_logsDir.c_str(), nullptr);
-		CreateDirectoryW(m_fontCacheDir.c_str(), nullptr);
-
-		m_prefsDir.append(L"\\");
-		m_scoresDir.append(L"\\");
-		m_userHousesDir.append(L"\\");
-		m_userSavesDir.append(L"\\");
-		m_logsDir.append(L"\\");
-		m_fontCacheDir.append(L"\\");
-		m_resourcesDir.append(L"\\");
+		CoTaskMemFree(docsPath);
+		return false;
 	}
 
+	CoTaskMemFree(docsPath);
+
+	if (!m_prefsDir.Append(L"\\" GP_APPLICATION_NAME_W))
+		return false;
+
+	if (!m_userHousesDir.Set(m_prefsDir) || !m_userHousesDir.Append(L"\\Houses"))
+		return false;
+
+	if (!m_userSavesDir.Set(m_prefsDir) || !m_userSavesDir.Append(L"\\SavedGames"))
+		return false;
+
+	if (!m_scoresDir.Set(m_prefsDir) || !m_scoresDir.Append(L"\\Scores"))
+		return false;
+
+	if (!m_logsDir.Set(m_prefsDir) || !m_logsDir.Append(L"\\Logs"))
+		return false;
+
+	CreateDirectoryW(m_prefsDir.Buffer(), nullptr);
+	CreateDirectoryW(m_scoresDir.Buffer(), nullptr);
+	CreateDirectoryW(m_userHousesDir.Buffer(), nullptr);
+	CreateDirectoryW(m_userSavesDir.Buffer(), nullptr);
+	CreateDirectoryW(m_logsDir.Buffer(), nullptr);
+
+	if (!m_prefsDir.Append(L"\\") ||
+		!m_scoresDir.Append(L"\\") ||
+		!m_userHousesDir.Append(L"\\") ||
+		!m_userSavesDir.Append(L"\\") ||
+		!m_logsDir.Append(L"\\") ||
+		!m_resourcesDir.Append(L"\\"))
+		return false;
+
 	DWORD modulePathSize = GetModuleFileNameW(nullptr, m_executablePath, MAX_PATH);
 	if (modulePathSize == MAX_PATH || modulePathSize == 0)
 		m_executablePath[0] = 0;
@@ -182,12 +203,19 @@ GpFileSystem_Win32::GpFileSystem_Win32()
 			currentPathLength--;
 	}
 
-	if (currentPathLength > 0)
-	{
-		m_packagedDir = std::wstring(m_executablePath) + L"Packaged\\";
-		m_housesDir = std::wstring(m_executablePath) + L"Packaged\\Houses\\";
-		m_resourcesDir = std::wstring(m_executablePath) + L"Resources\\";
-	}
+	if (currentPathLength == 0)
+		return false;
+
+	if (!m_packagedDir.Set(m_executablePath) || !m_packagedDir.Append(L"Packaged\\"))
+		return false;
+
+	if (!m_housesDir.Set(m_executablePath) || !m_housesDir.Append(L"Packaged\\Houses\\"))
+		return false;
+
+	if (!m_resourcesDir.Set(m_executablePath) || !m_resourcesDir.Append(L"Resources\\"))
+		return false;
+
+	return true;
 }
 
 bool GpFileSystem_Win32::FileExists(PortabilityLayer::VirtualDirectory_t virtualDirectory, const char *path)
@@ -428,9 +456,27 @@ const wchar_t *GpFileSystem_Win32::GetBasePath() const
 	return m_executablePath;
 }
 
+GpFileSystem_Win32 *GpFileSystem_Win32::CreateInstance(IGpAllocator *alloc)
+{
+	void *storage = alloc->Alloc(sizeof(GpFileSystem_Win32));
+	if (!storage)
+		return nullptr;
+
+	GpFileSystem_Win32 *fs = new (storage) GpFileSystem_Win32(alloc);
+	if (!fs->Init())
+	{
+		fs->Destroy();
+		return nullptr;
+	}
+
+	ms_instance = fs;
+
+	return fs;
+}
+
 GpFileSystem_Win32 *GpFileSystem_Win32::GetInstance()
 {
-	return &ms_instance;
+	return ms_instance;
 }
 
 bool GpFileSystem_Win32::ResolvePath(PortabilityLayer::VirtualDirectory_t virtualDirectory, char const* const* paths, size_t numPaths, wchar_t *outPath)
@@ -440,28 +486,28 @@ bool GpFileSystem_Win32::ResolvePath(PortabilityLayer::VirtualDirectory_t virtua
 	switch (virtualDirectory)
 	{
 	case PortabilityLayer::VirtualDirectories::kApplicationData:
-		baseDir = m_packagedDir.c_str();
+		baseDir = m_packagedDir.Buffer();
 		break;
 	case PortabilityLayer::VirtualDirectories::kGameData:
-		baseDir = m_housesDir.c_str();
+		baseDir = m_housesDir.Buffer();
 		break;
 	case PortabilityLayer::VirtualDirectories::kUserData:
-		baseDir = m_userHousesDir.c_str();
+		baseDir = m_userHousesDir.Buffer();
 		break;
 	case PortabilityLayer::VirtualDirectories::kUserSaves:
-		baseDir = m_userSavesDir.c_str();
+		baseDir = m_userSavesDir.Buffer();
 		break;
 	case PortabilityLayer::VirtualDirectories::kPrefs:
-		baseDir = m_prefsDir.c_str();
+		baseDir = m_prefsDir.Buffer();
 		break;
 	case PortabilityLayer::VirtualDirectories::kFonts:
-		baseDir = m_resourcesDir.c_str();
+		baseDir = m_resourcesDir.Buffer();
 		break;
 	case PortabilityLayer::VirtualDirectories::kHighScores:
-		baseDir = m_scoresDir.c_str();
+		baseDir = m_scoresDir.Buffer();
 		break;
 	case PortabilityLayer::VirtualDirectories::kLogs:
-		baseDir = m_logsDir.c_str();
+		baseDir = m_logsDir.Buffer();
 		break;
 	default:
 		return false;
@@ -507,4 +553,4 @@ bool GpFileSystem_Win32::ResolvePath(PortabilityLayer::VirtualDirectory_t virtua
 	return true;
 }
 
-GpFileSystem_Win32 GpFileSystem_Win32::ms_instance;
+GpFileSystem_Win32 *GpFileSystem_Win32::ms_instance;
diff --git a/Aerofoil/GpFileSystem_Win32.h b/Aerofoil/GpFileSystem_Win32.h
index 45acb89..8b75eb7 100644
--- a/Aerofoil/GpFileSystem_Win32.h
+++ b/Aerofoil/GpFileSystem_Win32.h
@@ -4,13 +4,14 @@
 
 #include "GpCoreDefs.h"
 #include "GpWindows.h"
-
-#include <string>
+#include "GpString.h"
 
 class GpFileSystem_Win32 final : public IGpFileSystem
 {
 public:
-	GpFileSystem_Win32();
+	explicit GpFileSystem_Win32(IGpAllocator *alloc);
+
+	void Destroy();
 
 	bool FileExists(PortabilityLayer::VirtualDirectory_t virtualDirectory, const char *path) override;
 	bool FileLocked(PortabilityLayer::VirtualDirectory_t virtualDirectory, const char *path, bool &exists) override;
@@ -25,23 +26,25 @@ public:
 
 	const wchar_t *GetBasePath() const;
 
+	static GpFileSystem_Win32 *CreateInstance(IGpAllocator *alloc);
 	static GpFileSystem_Win32 *GetInstance();
 
 private:
+	bool Init();
+
 	bool ResolvePath(PortabilityLayer::VirtualDirectory_t virtualDirectory, char const* const* paths, size_t numPaths, wchar_t *outPath);
 
-	std::wstring m_prefsDir;
-	std::wstring m_scoresDir;
-	std::wstring m_packagedDir;
-	std::wstring m_housesDir;
-	std::wstring m_logsDir;
-	std::wstring m_userHousesDir;
-	std::wstring m_userSavesDir;
-	std::wstring m_resourcesDir;
-	std::wstring m_fontCacheDir;
+	GpWString m_prefsDir;
+	GpWString m_scoresDir;
+	GpWString m_packagedDir;
+	GpWString m_housesDir;
+	GpWString m_logsDir;
+	GpWString m_userHousesDir;
+	GpWString m_userSavesDir;
+	GpWString m_resourcesDir;
 	wchar_t m_executablePath[MAX_PATH];
 
 	IGpAllocator *m_alloc;
 
-	static GpFileSystem_Win32 ms_instance;
+	static GpFileSystem_Win32 *ms_instance;
 };
diff --git a/Aerofoil/GpMain_Win32.cpp b/Aerofoil/GpMain_Win32.cpp
index 2343ac7..207d111 100644
--- a/Aerofoil/GpMain_Win32.cpp
+++ b/Aerofoil/GpMain_Win32.cpp
@@ -404,6 +404,13 @@ int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine
 	int nArgs;
 	LPWSTR *cmdLineArgs = CommandLineToArgvW(cmdLine, &nArgs);
 
+	IGpAllocator *alloc = GpAllocator_C::GetInstance();
+
+	// Init file system first since logging may depend on it
+	GpFileSystem_Win32 *fs = GpFileSystem_Win32::CreateInstance(alloc);
+	if (!fs)
+		return -1;
+
 	for (int i = 1; i < nArgs; i++)
 	{
 		if (!wcscmp(cmdLineArgs[i], L"-diagnostics"))
@@ -411,7 +418,6 @@ int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine
 	}
 
 	IGpLogDriver *logger = GpLogDriver_Win32::GetInstance();
-	IGpAllocator *alloc = GpAllocator_C::GetInstance();
 	IGpSystemServices *sysServices = GpSystemServices_Win32::GetInstance();
 
 	GpDriverCollection *drivers = GpAppInterface_Get()->PL_GetDriverCollection();
@@ -469,5 +475,7 @@ int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine
 
 	LocalFree(cmdLineArgs);
 
+	fs->Destroy();
+
 	return returnCode;
 }
diff --git a/AerofoilSDL/GpAudioDriver_SDL2.cpp b/AerofoilSDL/GpAudioDriver_SDL2.cpp
index 070697d..a01253d 100644
--- a/AerofoilSDL/GpAudioDriver_SDL2.cpp
+++ b/AerofoilSDL/GpAudioDriver_SDL2.cpp
@@ -58,33 +58,41 @@ static void AlignedFree(void *ptr)
 class GpAudioBuffer_SDL2 final : public IGpAudioBuffer
 {
 public:
+	typedef int16_t AudioSample_t;
+
 	static GpAudioBuffer_SDL2 *Create(const void *data, size_t size);
 
 	void AddRef() override;
 	void Release() override;
 
-	const void *GetData() const;
+	const AudioSample_t *GetData() const;
 	size_t GetSize() const;
 
 private:
-	GpAudioBuffer_SDL2(const void *data, size_t size);
+	GpAudioBuffer_SDL2(const AudioSample_t *data, size_t size);
 	~GpAudioBuffer_SDL2();
 
 	void Destroy();
 
-	const void *m_data;
+	const AudioSample_t *m_data;
 	size_t m_size;
 	SDL_atomic_t m_count;
 };
 
 GpAudioBuffer_SDL2 *GpAudioBuffer_SDL2::Create(const void *data, size_t size)
 {
-	void *storage = malloc(size + sizeof(GpAudioBuffer_SDL2));
+	size_t baseSize = sizeof(GpAudioBuffer_SDL2) + GP_SYSTEM_MEMORY_ALIGNMENT + 1;
+	baseSize -= baseSize % GP_SYSTEM_MEMORY_ALIGNMENT;
+	void *storage = malloc(size * sizeof(AudioSample_t) + baseSize);
 	if (!storage)
 		return nullptr;
 
-	void *dataPos = static_cast<uint8_t*>(storage) + sizeof(GpAudioBuffer_SDL2);
-	memcpy(dataPos, data, size);
+	AudioSample_t *dataPos = reinterpret_cast<AudioSample_t*>(static_cast<uint8_t*>(storage) + baseSize);
+
+	// Convert from u8 to s16
+	const uint8_t *srcData = static_cast<const uint8_t*>(data);
+	for (size_t i = 0; i < size; i++)
+		dataPos[i] = srcData[i] - 0x80;
 
 	return new (storage) GpAudioBuffer_SDL2(dataPos, size);
 }
@@ -102,7 +110,7 @@ void GpAudioBuffer_SDL2::Release()
 		this->Destroy();
 }
 
-const void *GpAudioBuffer_SDL2::GetData() const
+const int16_t *GpAudioBuffer_SDL2::GetData() const
 {
 	return m_data;
 }
@@ -113,7 +121,7 @@ size_t GpAudioBuffer_SDL2::GetSize() const
 }
 
 
-GpAudioBuffer_SDL2::GpAudioBuffer_SDL2(const void *data, size_t size)
+GpAudioBuffer_SDL2::GpAudioBuffer_SDL2(const int16_t *data, size_t size)
 	: m_data(data)
 	, m_size(size)
 {
@@ -135,6 +143,7 @@ class GpAudioChannel_SDL2 final : public IGpAudioChannel
 {
 public:
 	friend class GpAudioDriver_SDL2;
+	typedef GpAudioBuffer_SDL2::AudioSample_t AudioSample_t;
 
 	GpAudioChannel_SDL2(GpAudioDriver_SDL2_Duration_t latency, GpAudioDriver_SDL2_Duration_t bufferTime, size_t bufferSamplesMax, uint16_t sampleRate);
 	~GpAudioChannel_SDL2();
@@ -147,7 +156,7 @@ public:
 	void Stop() override;
 	void Destroy() override;
 
-	void Consume(uint8_t *output, size_t sz, GpAudioDriver_SDL2_TimePoint_t mixStartTime, GpAudioDriver_SDL2_TimePoint_t mixEndTime);
+	void Consume(int16_t *output, size_t sz, GpAudioDriver_SDL2_TimePoint_t mixStartTime, GpAudioDriver_SDL2_TimePoint_t mixEndTime);
 
 	static GpAudioChannel_SDL2 *Alloc(GpAudioDriver_SDL2 *driver, GpAudioDriver_SDL2_Duration_t latency, GpAudioDriver_SDL2_Duration_t bufferTime, size_t bufferSamplesMax, uint16_t sampleRate);
 
@@ -183,6 +192,9 @@ class GpAudioDriver_SDL2 final : public IGpAudioDriver, public IGpPrefsHandler
 public:
 	friend class GpAudioChannel_SDL2;
 
+	typedef GpAudioChannel_SDL2::AudioSample_t AudioSample_t;
+
+
 	explicit GpAudioDriver_SDL2(const GpAudioDriverProperties &properties);
 	~GpAudioDriver_SDL2();
 
@@ -206,13 +218,14 @@ private:
 
 	void MixAudio(void *stream, size_t len);
 	void RefillMixChunk(GpAudioChannel_SDL2 *const*channels, size_t numChannels, size_t maxSamplesToFill, GpAudioDriver_SDL2_TimePoint_t mixStartTime, GpAudioDriver_SDL2_TimePoint_t mixEndTime);
+	static void AddSamples(AudioSample_t *GP_RESTRICT dest, const AudioSample_t *GP_RESTRICT src, size_t nSamples);
 
 	GpAudioDriverProperties m_properties;
 	IGpMutex *m_mutex;
 	IGpMutex *m_mixState;
 
 	static const size_t kMaxChannels = 16;
-	static const size_t kMixChunkSize = 512;
+	static const size_t kMixChunkSamples = 512;
 	static const int16_t kMaxAudioVolumeScale = 64;
 
 	GpAudioChannel_SDL2 *m_channels[kMaxChannels];
@@ -225,7 +238,7 @@ private:
 
 	bool m_sdlAudioRunning;
 
-	GP_ALIGNED(GP_SYSTEM_MEMORY_ALIGNMENT) int16_t m_mixChunk[kMixChunkSize];
+	GP_ALIGNED(GP_SYSTEM_MEMORY_ALIGNMENT) int16_t m_mixChunk[kMixChunkSamples];
 	size_t m_mixChunkReadOffset;
 
 	int16_t m_audioVolumeScale;
@@ -370,7 +383,7 @@ bool GpAudioChannel_SDL2::Init(GpAudioDriver_SDL2 *driver)
 	return true;
 }
 
-void GpAudioChannel_SDL2::Consume(uint8_t *output, size_t sz, GpAudioDriver_SDL2_TimePoint_t mixStartTime, GpAudioDriver_SDL2_TimePoint_t mixEndTime)
+void GpAudioChannel_SDL2::Consume(int16_t *output, size_t sz, GpAudioDriver_SDL2_TimePoint_t mixStartTime, GpAudioDriver_SDL2_TimePoint_t mixEndTime)
 {
 	m_mutex->Lock();
 
@@ -380,7 +393,7 @@ void GpAudioChannel_SDL2::Consume(uint8_t *output, size_t sz, GpAudioDriver_SDL2
 
 	if (sz <= m_leadingSilence)
 	{
-		memset(output, 0x80, sz);
+		memset(output, 0, sz * sizeof(AudioSample_t));
 		m_leadingSilence -= sz;
 
 		m_isMixing = false;
@@ -392,7 +405,7 @@ void GpAudioChannel_SDL2::Consume(uint8_t *output, size_t sz, GpAudioDriver_SDL2
 		size_t leadingSilence = m_leadingSilence;
 		if (leadingSilence > 0)
 		{
-			memset(output, 0x80, leadingSilence);
+			memset(output, 0, leadingSilence * sizeof(AudioSample_t));
 			output += leadingSilence;
 			sz -= leadingSilence;
 
@@ -403,7 +416,7 @@ void GpAudioChannel_SDL2::Consume(uint8_t *output, size_t sz, GpAudioDriver_SDL2
 	while (m_numQueuedBuffers > 0)
 	{
 		GpAudioBuffer_SDL2 *buffer = m_pendingBuffers[m_nextPendingBufferConsumePos];
-		const void *bufferData = buffer->GetData();
+		const int16_t *bufferData = buffer->GetData();
 		const size_t bufferSize = buffer->GetSize();
 
 		assert(m_firstBufferSamplesConsumed < bufferSize);
@@ -411,7 +424,7 @@ void GpAudioChannel_SDL2::Consume(uint8_t *output, size_t sz, GpAudioDriver_SDL2
 		const size_t available = (bufferSize - m_firstBufferSamplesConsumed);
 		if (available <= sz)
 		{
-			memcpy(output, static_cast<const uint8_t*>(bufferData) + m_firstBufferSamplesConsumed, available);
+			memcpy(output, bufferData + m_firstBufferSamplesConsumed, available * sizeof(AudioSample_t));
 			sz -= available;
 			output += available;
 
@@ -430,7 +443,7 @@ void GpAudioChannel_SDL2::Consume(uint8_t *output, size_t sz, GpAudioDriver_SDL2
 		}
 		else
 		{
-			memcpy(output, static_cast<const uint8_t*>(bufferData) + m_firstBufferSamplesConsumed, sz);
+			memcpy(output, bufferData + m_firstBufferSamplesConsumed, sz * sizeof(AudioSample_t));
 			m_firstBufferSamplesConsumed += sz;
 			output += sz;
 			sz = 0;
@@ -442,7 +455,7 @@ void GpAudioChannel_SDL2::Consume(uint8_t *output, size_t sz, GpAudioDriver_SDL2
 
 	m_mutex->Unlock();
 
-	memset(output, 0x80, sz);
+	memset(output, 0, sz * sizeof(AudioSample_t));
 }
 
 GpAudioChannel_SDL2 *GpAudioChannel_SDL2::Alloc(GpAudioDriver_SDL2 *driver, GpAudioDriver_SDL2_Duration_t latency, GpAudioDriver_SDL2_Duration_t bufferTime, size_t bufferSamplesMax, uint16_t sampleRate)
@@ -473,14 +486,14 @@ GpAudioDriver_SDL2::GpAudioDriver_SDL2(const GpAudioDriverProperties &properties
 	, m_latency(GpAudioDriver_SDL2_Duration_t::zero())
 	, m_bufferTime(GpAudioDriver_SDL2_Duration_t::zero())
 	, m_sdlAudioRunning(false)
-	, m_mixChunkReadOffset(kMixChunkSize)
+	, m_mixChunkReadOffset(kMixChunkSamples)
 	, m_audioVolumeScale(kMaxAudioVolumeScale)
 
 {
 	for (size_t i = 0; i < kMaxChannels; i++)
 		m_channels[i] = nullptr;
 
-	for (size_t i = 0; i < kMixChunkSize; i++)
+	for (size_t i = 0; i < kMixChunkSamples; i++)
 		m_mixChunk[i] = 0;
 }
 
@@ -560,7 +573,7 @@ bool GpAudioDriver_SDL2::Init()
 	requestedSpec.channels = 1;
 	requestedSpec.format = AUDIO_S16;
 	requestedSpec.freq = m_properties.m_sampleRate;
-	requestedSpec.samples = kMixChunkSize;
+	requestedSpec.samples = kMixChunkSamples;
 	requestedSpec.userdata = this;
 
 	if (SDL_OpenAudio(&requestedSpec, nullptr))
@@ -628,7 +641,7 @@ void GpAudioDriver_SDL2::MixAudio(void *stream, size_t len)
 	size_t samplesSinceStart = 0;
 	for (;;)
 	{
-		size_t availableInMixChunk = kMixChunkSize - m_mixChunkReadOffset;
+		size_t availableInMixChunk = kMixChunkSamples - m_mixChunkReadOffset;
 
 		if (availableInMixChunk > samplesRemaining)
 		{
@@ -662,20 +675,21 @@ void GpAudioDriver_SDL2::MixAudio(void *stream, size_t len)
 
 void GpAudioDriver_SDL2::RefillMixChunk(GpAudioChannel_SDL2 *const*channels, size_t numChannels, size_t maxSamplesToFill, GpAudioDriver_SDL2_TimePoint_t mixStartTime, GpAudioDriver_SDL2_TimePoint_t mixEndTime)
 {
-	uint8_t audioMixBufferUnaligned[kMixChunkSize + GP_SYSTEM_MEMORY_ALIGNMENT];
-	uint8_t *audioMixBuffer = audioMixBufferUnaligned;
+	uint8_t audioMixBufferUnaligned[kMixChunkSamples * sizeof(AudioSample_t) + GP_SYSTEM_MEMORY_ALIGNMENT];
+	uint8_t *audioMixBufferBytes = audioMixBufferUnaligned;
 
 	{
-		uintptr_t bufferPtr = reinterpret_cast<uintptr_t>(audioMixBuffer);
+		uintptr_t bufferPtr = reinterpret_cast<uintptr_t>(audioMixBufferBytes);
 		size_t alignPadding = GP_SYSTEM_MEMORY_ALIGNMENT - (bufferPtr % GP_SYSTEM_MEMORY_ALIGNMENT);
-		audioMixBuffer += alignPadding;
+		audioMixBufferBytes += alignPadding;
 	}
 
+	AudioSample_t *audioMixBuffer = reinterpret_cast<AudioSample_t*>(audioMixBufferBytes);
 	bool noAudio = true;
 
 	const int16_t audioVolumeScale = m_audioVolumeScale;
 
-	size_t samplesToFill = kMixChunkSize;
+	size_t samplesToFill = kMixChunkSamples;
 	if (samplesToFill > maxSamplesToFill)
 	{
 		m_mixChunkReadOffset += samplesToFill - maxSamplesToFill;
@@ -684,8 +698,7 @@ void GpAudioDriver_SDL2::RefillMixChunk(GpAudioChannel_SDL2 *const*channels, siz
 	else
 		m_mixChunkReadOffset = 0;
 
-	int16_t *mixChunkStart = m_mixChunk + m_mixChunkReadOffset;
-	int16_t audioNormalizeShift = 0;
+	AudioSample_t *mixChunkStart = m_mixChunk + m_mixChunkReadOffset;
 
 	for (size_t i = 0; i < numChannels; i++)
 	{
@@ -694,27 +707,27 @@ void GpAudioDriver_SDL2::RefillMixChunk(GpAudioChannel_SDL2 *const*channels, siz
 		if (i == 0)
 		{
 			noAudio = false;
-			audioNormalizeShift = 0x80;
-			for (size_t j = 0; j < samplesToFill; j++)
-				mixChunkStart[j] = static_cast<int16_t>(audioMixBuffer[j]);
+			memcpy(mixChunkStart, audioMixBuffer, samplesToFill * sizeof(AudioSample_t));
 		}
 		else
-		{
-			audioNormalizeShift += 0x80;
-			for (size_t j = 0; j < samplesToFill; j++)
-				mixChunkStart[j] += static_cast<int16_t>(audioMixBuffer[j]);
-		}
+			AddSamples(mixChunkStart, audioMixBuffer, samplesToFill);
 	}
 
 	if (noAudio)
-		memset(mixChunkStart, 0, samplesToFill * sizeof(mixChunkStart[0]));
+		memset(mixChunkStart, 0, samplesToFill * sizeof(AudioSample_t));
 	else
 	{
 		for (size_t i = 0; i < samplesToFill; i++)
-			mixChunkStart[i] = (mixChunkStart[i] - audioNormalizeShift) * audioVolumeScale;
+			mixChunkStart[i] *= audioVolumeScale;
 	}
 }
 
+void GpAudioDriver_SDL2::AddSamples(AudioSample_t *GP_RESTRICT dest, const AudioSample_t *GP_RESTRICT src, size_t nSamples)
+{
+	for (size_t i = 0; i < nSamples; i++)
+		dest[i] += src[i];
+}
+
 
 GpAudioDriver_SDL2_TimePoint_t GpAudioDriver_SDL2::GetCurrentTime()
 {
diff --git a/AerofoilSDL/GpMain_SDL_Win32.cpp b/AerofoilSDL/GpMain_SDL_Win32.cpp
index 39a0198..0220c7a 100644
--- a/AerofoilSDL/GpMain_SDL_Win32.cpp
+++ b/AerofoilSDL/GpMain_SDL_Win32.cpp
@@ -37,6 +37,12 @@ IGpInputDriver *GpDriver_CreateInputDriver_SDL2_Gamepad(const GpInputDriverPrope
 
 int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow)
 {
+	IGpAllocator *alloc = GpAllocator_C::GetInstance();
+
+	GpFileSystem_Win32 *fs = GpFileSystem_Win32::CreateInstance(alloc);
+	if (!fs)
+		return -1;
+
 	if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_GAMECONTROLLER) < 0)
 		return -1;
 
@@ -57,7 +63,7 @@ int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine
 	IGpLogDriver *logger = GpLogDriver_Win32::GetInstance();
 	GpDriverCollection *drivers = GpAppInterface_Get()->PL_GetDriverCollection();
 
-	drivers->SetDriver<GpDriverIDs::kFileSystem>(GpFileSystem_Win32::GetInstance());
+	drivers->SetDriver<GpDriverIDs::kFileSystem>(fs);
 	drivers->SetDriver<GpDriverIDs::kSystemServices>(GpSystemServices_Win32::GetInstance());
 	drivers->SetDriver<GpDriverIDs::kLog>(GpLogDriver_Win32::GetInstance());
 	drivers->SetDriver<GpDriverIDs::kAlloc>(GpAllocator_C::GetInstance());
@@ -88,7 +94,7 @@ int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine
 	g_gpGlobalConfig.m_osGlobals = &g_gpWindowsGlobals;
 	g_gpGlobalConfig.m_logger = logger;
 	g_gpGlobalConfig.m_systemServices = GpSystemServices_Win32::GetInstance();
-	g_gpGlobalConfig.m_allocator = GpAllocator_C::GetInstance();
+	g_gpGlobalConfig.m_allocator = alloc;
 
 	GpDisplayDriverFactory::RegisterDisplayDriverFactory(EGpDisplayDriverType_SDL_GL2, GpDriver_CreateDisplayDriver_SDL_GL2);
 	GpAudioDriverFactory::RegisterAudioDriverFactory(EGpAudioDriverType_SDL2, GpDriver_CreateAudioDriver_SDL);
@@ -105,5 +111,7 @@ int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine
 
 	LocalFree(cmdLineArgs);
 
+	fs->Destroy();
+
 	return returnCode;
 }
diff --git a/Common/CoreDefs.h b/Common/CoreDefs.h
index 8e597ed..d74ccae 100644
--- a/Common/CoreDefs.h
+++ b/Common/CoreDefs.h
@@ -13,11 +13,13 @@
 #define GP_ALIGNED(n) __declspec(align(n))
 #else
 #define GP_ALIGNED(n) __attribute__((aligned(n)))
+#define GP_RESTRICT 
 #endif
 
 #if GP_IS_CPP11
 #define GP_DELETED = delete
 #define GP_STATIC_ASSERT(n) static_assert((n), "Static assert failed: " #n)
+#define GP_RESTRICT __restrict
 #else
 #ifndef nullptr
 #define nullptr 0
@@ -32,6 +34,7 @@
 #endif
 
 #define GP_DELETED
+#define GP_RESTRICT
 
 template<bool TCondition>
 struct __GpStaticAssertHelper
diff --git a/GpCommon/GpString.h b/GpCommon/GpString.h
new file mode 100644
index 0000000..58adb69
--- /dev/null
+++ b/GpCommon/GpString.h
@@ -0,0 +1,150 @@
+#pragma once
+
+#include "GpVector.h"
+
+#include <stdint.h>
+#include <stddef.h>
+
+template<class TChar>
+class GpString
+{
+public:
+	explicit GpString(IGpAllocator *alloc);
+	GpString(GpString<TChar> &&other);
+
+	bool Set(const TChar *str);
+	bool Set(const TChar *str, size_t len);
+	bool Set(const GpString<TChar> &other);
+
+	bool Append(const TChar *str);
+	bool Append(const TChar *str, size_t len);
+	bool Append(const GpString<TChar> &other);
+
+	TChar *Buffer();
+	const TChar *Buffer() const ;
+
+
+private:
+	static const size_t kStaticSize = 32;
+
+	GpVector<TChar, kStaticSize> m_chars;
+	size_t m_length;
+};
+
+typedef GpString<char> GpCString;
+typedef GpString<wchar_t> GpWString;
+
+#include <new>
+#include <string.h>
+
+template<class TChar>
+GpString<TChar>::GpString(IGpAllocator *alloc)
+	: m_chars(alloc)
+	, m_length(0)
+{
+	(void)m_chars.Resize(1);
+	m_chars[0] = static_cast<TChar>(0);
+}
+
+template<class TChar>
+GpString<TChar>::GpString(GpString<TChar> &&other)
+	: m_chars(static_cast<GpVector<TChar, kStaticSize>&&>(other.m_chars))
+	, m_length(other.m_length)
+{
+	other.m_length = 0;
+}
+
+
+template<class TChar>
+bool GpString<TChar>::Set(const TChar *str)
+{
+	size_t len = 0;
+	while (str[len] != static_cast<TChar>(0))
+		len++;
+
+	return this->Set(str, len);
+}
+
+template<class TChar>
+bool GpString<TChar>::Set(const TChar *str, size_t len)
+{
+	if (!m_chars.ResizeNoConstruct(len + 1))
+		return false;
+
+	TChar *chars = m_chars.Buffer();
+	memcpy(chars, str, sizeof(TChar) * len);
+	chars[len] = static_cast<TChar>(0);
+
+	m_length = len;
+
+	return true;
+}
+
+template<class TChar>
+bool GpString<TChar>::Set(const GpString<TChar> &other)
+{
+	if (&other == this)
+		return true;
+
+	return this->Set(other.Buffer(), other.m_length);
+}
+
+template<class TChar>
+bool GpString<TChar>::Append(const TChar *str)
+{
+	size_t len = 0;
+	while (str[len] != static_cast<TChar>(0))
+		len++;
+
+	return this->Append(str, len);
+}
+
+template<class TChar>
+bool GpString<TChar>::Append(const TChar *str, size_t len)
+{
+	// This is a special path in case we're appending the string to itself and the resize relocates the buffer
+	if (len == 0)
+		return true;
+
+	assert(str != this->Buffer());
+
+	if (!m_chars.ResizeNoConstruct(m_length + len + 1))
+		return false;
+
+	memcpy(m_chars.Buffer() + m_length, str, sizeof(TChar) * len);
+	m_chars[m_length + len] = static_cast<TChar>(0);
+
+	m_length += len;
+
+	return true;
+}
+
+template<class TChar>
+bool GpString<TChar>::Append(const GpString<TChar> &other)
+{
+	// This is a special path in case we're appending the string to itself and the resize relocates the buffer
+	if (other.m_length == 0)
+		return true;
+
+	if (!m_chars.ResizeNoConstruct(m_length + other.m_length))
+		return false;
+
+	memcpy(m_chars.Buffer() + m_length, other.Buffer(), sizeof(TChar) * other.m_length);
+	m_chars[m_length + other.m_length] = static_cast<TChar>(0);
+
+	m_length += other.m_length;
+
+	return true;
+}
+
+template<class TChar>
+TChar *GpString<TChar>::Buffer()
+{
+	return m_chars.Buffer();
+}
+
+template<class TChar>
+const TChar *GpString<TChar>::Buffer() const
+{
+	return m_chars.Buffer();
+}
diff --git a/GpCommon/GpVector.h b/GpCommon/GpVector.h
new file mode 100644
index 0000000..1472363
--- /dev/null
+++ b/GpCommon/GpVector.h
@@ -0,0 +1,230 @@
+#pragma once
+
+#include "CoreDefs.h"
+
+#include <stdint.h>
+
+struct IGpAllocator;
+
+template<class T, size_t TStaticSize>
+class GpVectorStaticData
+{
+protected:
+	GP_ALIGNED(GP_SYSTEM_MEMORY_ALIGNMENT) uint8_t m_staticElementData[sizeof(T) * TStaticSize];
+
+	T *GetStaticElements();
+	const T *GetStaticElements() const;
+};
+
+template<class T>
+class GpVectorStaticData<T, 0>
+{
+protected:
+	T *GetStaticElements();
+	const T *GetStaticElements() const;
+};
+
+
+template<class T, size_t TStaticSize = 0>
+class GpVector : public GpVectorStaticData<T, TStaticSize>
+{
+public:
+	explicit GpVector(IGpAllocator *alloc);
+	GpVector(GpVector<T, TStaticSize> &&other);
+	~GpVector();
+
+	T &operator[](size_t index);
+	const T &operator[](size_t index) const;
+
+	bool Resize(size_t newSize);
+	bool ResizeNoConstruct(size_t newSize);
+
+	T *Buffer();
+	const T *Buffer() const;
+
+	const size_t Count() const;
+
+private:
+	GpVector(const GpVector<T, TStaticSize> &other) GP_DELETED;
+
+	static const size_t kStaticSize = TStaticSize;
+
+	T *m_elements;
+	size_t m_capacity;
+	size_t m_count;
+	IGpAllocator *m_alloc;
+};
+
+#include <new>
+#include <cassert>
+#include "IGpAllocator.h"
+
+template<class T, size_t TStaticSize>
+T *GpVectorStaticData<T, TStaticSize>::GetStaticElements()
+{
+	return reinterpret_cast<T*>(this->m_staticElementData);
+}
+
+template<class T, size_t TStaticSize>
+const T *GpVectorStaticData<T, TStaticSize>::GetStaticElements() const
+{
+	return reinterpret_cast<const T*>(this->m_staticElementData);
+}
+
+template<class T>
+T *GpVectorStaticData<T, 0>::GetStaticElements()
+{
+	return nullptr;
+}
+
+template<class T>
+const T *GpVectorStaticData<T, 0>::GetStaticElements() const
+{
+	return nullptr;
+}
+
+///////////////////////////////////////////////////////////////////////////////
+// GpVector
+template<class T, size_t TStaticSize>
+GpVector<T, TStaticSize>::GpVector(IGpAllocator *alloc)
+	: m_elements(this->GetStaticElements())
+	, m_capacity(TStaticSize)
+	, m_count(0)
+	, m_alloc(alloc)
+{
+}
+
+template<class T, size_t TStaticSize>
+GpVector<T, TStaticSize>::GpVector(GpVector<T, TStaticSize> &&other)
+	: m_elements(other.m_elements)
+	, m_capacity(other.m_capacity)
+	, m_count(other.m_count)
+	, m_alloc(other.m_alloc)
+{
+	if (m_capacity <= TStaticSize)
+	{
+		const size_t count = m_count;
+		T *elements = this->GetStaticElements();
+		const T *srcElements = other.m_elements;
+		m_elements = elements;
+		for (size_t i = 0; i < count; i++)
+			new (m_elements + i) T(static_cast<T&&>(other.m_elements));
+	}
+
+	other.m_count = 0;
+	other.m_capacity = 0;
+	other.m_elements = nullptr;
+}
+
+template<class T, size_t TStaticSize>
+GpVector<T, TStaticSize>::~GpVector()
+{
+	T *elements = m_elements;
+	size_t remaining = m_count;
+
+	while (remaining > 0)
+	{
+		remaining--;
+		elements[remaining].~T();
+	}
+
+	if (m_capacity > TStaticSize)
+	{
+		m_alloc->Release(m_elements);
+	}
+}
+
+template<class T, size_t TStaticSize>
+T &GpVector<T, TStaticSize>::operator[](size_t index)
+{
+	assert(index <= m_count);
+	return m_elements[index];
+}
+
+template<class T, size_t TStaticSize>
+const T &GpVector<T, TStaticSize>::operator[](size_t index) const
+{
+	assert(index <= m_count);
+	return m_elements[index];
+}
+
+
+template<class T, size_t TStaticSize>
+bool GpVector<T, TStaticSize>::Resize(size_t newSize)
+{
+	const size_t oldCount = m_count;
+
+	if (!ResizeNoConstruct(newSize))
+		return false;
+
+	for (size_t i = oldCount; i < newSize; i++)
+		new (m_elements + i) T();
+
+	return true;
+}
+
+template<class T, size_t TStaticSize>
+bool GpVector<T, TStaticSize>::ResizeNoConstruct(size_t newSize)
+{
+	T *elements = m_elements;
+
+	if (newSize <= m_count)
+	{
+		size_t count = m_count;
+		while (count > newSize)
+		{
+			count--;
+			m_elements[count].~T();
+		}
+
+		m_count = count;
+		return true;
+	}
+
+	if (newSize <= m_capacity)
+	{
+		m_count = newSize;
+		return true;
+	}
+
+	size_t newCapacity = newSize;
+	assert(newCapacity > kStaticSize);
+
+	T *newElements = static_cast<T*>(m_alloc->Alloc(newCapacity * sizeof(T)));
+	if (!newElements)
+		return false;
+
+	const size_t oldCount = m_count;
+	for (size_t i = 0; i < oldCount; i++)
+		new (newElements + i) T(static_cast<T&&>(elements[i]));
+
+	for (size_t i = 0; i < oldCount; i++)
+		elements[oldCount - 1 - i].~T();
+
+	if (m_capacity > kStaticSize)
+		m_alloc->Release(m_elements);
+
+	m_elements = newElements;
+	m_capacity = newCapacity;
+	m_count = newSize;
+
+	return true;
+}
+
+template<class T, size_t TStaticSize>
+const size_t GpVector<T, TStaticSize>::Count() const
+{
+	return m_count;
+}
+
+template<class T, size_t TStaticSize>
+T *GpVector<T, TStaticSize>::Buffer()
+{
+	return m_elements;
+}
+
+template<class T, size_t TStaticSize>
+const T *GpVector<T, TStaticSize>::Buffer() const
+{
+	return m_elements;
+}