diff --git a/.idea/LipSync.iml b/.idea/LipSync.iml
index e9eb483..540160f 100644
--- a/.idea/LipSync.iml
+++ b/.idea/LipSync.iml
@@ -145,6 +145,8 @@
       <sourceFolder url="file://$MODULE_DIR$/src/phone_extraction.h" isTestSource="false" />
       <sourceFolder url="file://$MODULE_DIR$/src/platform_tools.h" isTestSource="false" />
       <sourceFolder url="file://$MODULE_DIR$/src/platform_tools_win.cpp" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/src/tools.cpp" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/src/tools.h" isTestSource="false" />
     </content>
     <orderEntry type="inheritedJdk" />
     <orderEntry type="sourceFolder" forTests="false" />
diff --git a/CMakeLists.txt b/CMakeLists.txt
index d0ac8f5..dbc9835 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,7 +1,7 @@
 cmake_minimum_required(VERSION 3.3)
 project(LipSync)
 
-set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -Wall")
+set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -Wall -Wextra")
 
 set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib")
 set(CMAKE_LIBRARY_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib")
@@ -14,7 +14,7 @@ set(Boost_USE_STATIC_RUNTIME ON) # Use static C++ runtime
 find_package(Boost REQUIRED COMPONENTS filesystem locale system)
 include_directories(${Boost_INCLUDE_DIRS})
 
-set(SOURCE_FILES src/main.cpp src/audio_input/WaveFileReader.cpp src/audio_input/WaveFileReader.h src/audio_input/ChannelDownmixer.cpp src/audio_input/ChannelDownmixer.h src/audio_input/AudioStream.h src/audio_input/SampleRateConverter.cpp src/audio_input/SampleRateConverter.h src/audio_input/wave_file_writing.cpp src/audio_input/wave_file_writing.h src/audio_input/io_tools.h src/platform_tools.h src/phone_extraction.cpp src/phone_extraction.h src/Phone.cpp src/Phone.h src/centiseconds.cpp src/centiseconds.h)
+set(SOURCE_FILES src/main.cpp src/audio_input/WaveFileReader.cpp src/audio_input/WaveFileReader.h src/audio_input/ChannelDownmixer.cpp src/audio_input/ChannelDownmixer.h src/audio_input/AudioStream.h src/audio_input/SampleRateConverter.cpp src/audio_input/SampleRateConverter.h src/audio_input/wave_file_writing.cpp src/audio_input/wave_file_writing.h src/audio_input/io_tools.h src/platform_tools.h src/phone_extraction.cpp src/phone_extraction.h src/Phone.cpp src/Phone.h src/centiseconds.cpp src/centiseconds.h src/tools.cpp src/tools.h)
 if(WIN32)
 	set(SOURCE_FILES "${SOURCE_FILES};src/platform_tools_win.cpp")
 else()
diff --git a/src/audio_input/WaveFileReader.cpp b/src/audio_input/WaveFileReader.cpp
index bcb6322..616d281 100644
--- a/src/audio_input/WaveFileReader.cpp
+++ b/src/audio_input/WaveFileReader.cpp
@@ -24,10 +24,10 @@ enum class Codec {
 	Float = 0x03
 };
 
-WaveFileReader::WaveFileReader(std::string fileName) {
+WaveFileReader::WaveFileReader(boost::filesystem::path filePath) {
 	// Open file
 	file.exceptions(std::ifstream::failbit | std::ifstream::badbit);
-	file.open(fileName, std::ios::binary);
+	file.open(filePath, std::ios::binary);
 
 	// Read header
 	uint32_t rootChunkId = read<uint32_t>(file);
diff --git a/src/audio_input/WaveFileReader.h b/src/audio_input/WaveFileReader.h
index 520f6f1..1eaeadf 100644
--- a/src/audio_input/WaveFileReader.h
+++ b/src/audio_input/WaveFileReader.h
@@ -4,6 +4,8 @@
 #include <string>
 #include <cstdint>
 #include <fstream>
+#include <boost/filesystem/path.hpp>
+#include <boost/filesystem/fstream.hpp>
 #include "AudioStream.h"
 
 enum class SampleFormat {
@@ -15,14 +17,14 @@ enum class SampleFormat {
 
 class WaveFileReader : public AudioStream {
 public:
-	WaveFileReader(std::string fileName);
+	WaveFileReader(boost::filesystem::path filePath);
 	virtual int getFrameRate() override ;
 	virtual int getFrameCount() override;
 	virtual int getChannelCount() override;
 	virtual bool getNextSample(float &sample) override;
 
 private:
-	std::ifstream file;
+	boost::filesystem::ifstream file;
 	SampleFormat sampleFormat;
 	int frameRate;
 	int frameCount;
diff --git a/src/main.cpp b/src/main.cpp
index b4511eb..33a1db1 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1,9 +1,11 @@
 #include <iostream>
 #include "audio_input/WaveFileReader.h"
 #include "phone_extraction.h"
+#include "platform_tools.h"
 
 using std::exception;
 using std::string;
+using std::wstring;
 using std::unique_ptr;
 
 string getMessage(const exception& e) {
@@ -17,9 +19,9 @@ string getMessage(const exception& e) {
 	return result;
 }
 
-unique_ptr<AudioStream> createAudioStream(string fileName) {
+unique_ptr<AudioStream> createAudioStream(boost::filesystem::path filePath) {
 	try {
-		return unique_ptr<AudioStream>(new WaveFileReader(fileName));
+		return unique_ptr<AudioStream>(new WaveFileReader(filePath));
 	} catch (...) {
 		std::throw_with_nested(std::runtime_error("Could not open sound file.") );
 	}
@@ -27,8 +29,17 @@ unique_ptr<AudioStream> createAudioStream(string fileName) {
 
 int main(int argc, char *argv[]) {
 	try {
-		unique_ptr<AudioStream> audioStream = createAudioStream(R"(C:\Users\Daniel\Desktop\audio-test\test 16000Hz 1ch 16bit.wav)");
+		// Get sound file name
+		std::vector<wstring> commandLineArgs = getCommandLineArgs(argc, argv);
+		if (commandLineArgs.size() != 2) {
+			throw std::runtime_error("Invalid command line arguments. Call with sound file name as sole argument.");
+		}
+		wstring soundFileName = commandLineArgs[1];
 
+		// Create audio streams
+		unique_ptr<AudioStream> audioStream = createAudioStream(soundFileName);
+
+		// Detect phones
 		std::map<centiseconds, Phone> phones = detectPhones(std::move(audioStream));
 
 		for (auto &pair : phones) {
diff --git a/src/phone_extraction.cpp b/src/phone_extraction.cpp
index 7a95925..32459e3 100644
--- a/src/phone_extraction.cpp
+++ b/src/phone_extraction.cpp
@@ -5,6 +5,8 @@
 #include "audio_input/SampleRateConverter.h"
 #include "audio_input/ChannelDownmixer.h"
 #include "platform_tools.h"
+#include "tools.h"
+
 using std::runtime_error;
 using std::unique_ptr;
 using std::shared_ptr;
@@ -12,9 +14,6 @@ using std::string;
 using std::map;
 using boost::filesystem::path;
 
-template<typename T>
-using lambda_unique_ptr = std::unique_ptr<T,std::function<void(T*)>>;
-
 unique_ptr<AudioStream> to16kHzMono(unique_ptr<AudioStream> stream) {
 	// Downmix, if required
 	if (stream->getChannelCount() != 1) {
diff --git a/src/platform_tools.h b/src/platform_tools.h
index 55d27ea..30e925f 100644
--- a/src/platform_tools.h
+++ b/src/platform_tools.h
@@ -3,6 +3,8 @@
 
 #include <boost/filesystem.hpp>
 
+std::vector<std::wstring> getCommandLineArgs(int argc, char *argv[]);
+
 boost::filesystem::path getBinDirectory();
 
 #endif //LIPSYNC_PLATFORM_TOOLS_H
diff --git a/src/platform_tools_win.cpp b/src/platform_tools_win.cpp
index d500b2a..07cd813 100644
--- a/src/platform_tools_win.cpp
+++ b/src/platform_tools_win.cpp
@@ -1,9 +1,31 @@
+#include <Windows.h>
+#include "tools.h"
 #include "platform_tools.h"
 
-#include <Windows.h>
+std::vector<std::wstring> getCommandLineArgs(int argc, char **argv) {
+	UNUSED(argv);
+
+	// Get command line as single Unicode string
+	LPWSTR commandLine = GetCommandLineW();
+
+	// Split into individual args
+	int argumentCount;
+	LPWSTR* arguments = CommandLineToArgvW(commandLine, &argumentCount);
+	if (!arguments) throw std::runtime_error("Could not determine command line arguments.");
+	auto _ = finally([&arguments](){ LocalFree(arguments); });
+	assert(argumentCount == argc);
+
+	// Convert to vector
+	std::vector<std::wstring> result;
+	for (int i = 0; i < argumentCount; i++) {
+		result.push_back(arguments[i]);
+	}
+
+	return result;
+}
 
 boost::filesystem::path getBinDirectory() {
-	std::vector<wchar_t> executablePath(MAX_PATH);
+	std::vector<WCHAR> executablePath(MAX_PATH);
 
 	// Try to get the executable path with a buffer of MAX_PATH characters.
 	DWORD result = GetModuleFileNameW(0, executablePath.data(), executablePath.size());
diff --git a/src/tools.cpp b/src/tools.cpp
new file mode 100644
index 0000000..2fa7e97
--- /dev/null
+++ b/src/tools.cpp
@@ -0,0 +1 @@
+#include "tools.h"
diff --git a/src/tools.h b/src/tools.h
new file mode 100644
index 0000000..87e77f9
--- /dev/null
+++ b/src/tools.h
@@ -0,0 +1,39 @@
+#ifndef LIPSYNC_TOOLS_H
+#define LIPSYNC_TOOLS_H
+
+#include <functional>
+#include <memory>
+
+#define UNUSED(x) ((void)(x))
+
+template<typename T>
+using lambda_unique_ptr = std::unique_ptr<T, std::function<void(T*)>>;
+
+// The following definitions are taken from https://github.com/Microsoft/GSL.
+
+// final_act allows you to ensure something gets run at the end of a scope
+template <class F>
+class final_act
+{
+public:
+	explicit final_act(F f) noexcept : f_(std::move(f)), invoke_(true) {}
+
+	final_act(final_act&& other) noexcept : f_(std::move(other.f_)), invoke_(other.invoke_) { other.invoke_ = false; }
+	final_act(const final_act&) = delete;
+	final_act& operator=(const final_act&) = delete;
+
+	~final_act() noexcept { if (invoke_) f_(); }
+
+private:
+	F f_;
+	bool invoke_;
+};
+
+// finally() - convenience function to generate a final_act
+template <class F>
+final_act<F> finally(const F &f) noexcept { return final_act<F>(f); }
+
+template <class F>
+final_act<F> finally(F &&f) noexcept { return final_act<F>(std::forward<F>(f)); }
+
+#endif //LIPSYNC_TOOLS_H