diff --git a/CMakeLists.txt b/CMakeLists.txt
index fa72c08..8d783ad 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -45,6 +45,9 @@ add_executable(unit_tests
 target_link_libraries(unit_tests criterion -lgcov)
 target_compile_options(unit_tests PUBLIC -fprofile-arcs -ftest-coverage)
 
+#include SFML
+add_link_options(-lsfml-graphics -lsfml-window -lsfml-audio -lsfml-network -lsfml-system)
+
 # make app
 add_executable(ComSquare
         main.cpp
diff --git a/sources/APU/APU.hpp b/sources/APU/APU.hpp
index 6b587b1..e6a6fda 100644
--- a/sources/APU/APU.hpp
+++ b/sources/APU/APU.hpp
@@ -106,9 +106,9 @@ namespace ComSquare::APU
 	class APU : public Memory::IMemory {
 	private:
 		//! @brief All the registers of the APU CPU
-		Registers _registers;
+		Registers _registers{};
 		//! @brief Internal registers of the CPU (accessible from the bus via addr $4200 to $421F).
-		InternalRegisters _internalRegisters;
+		InternalRegisters _internalRegisters{};
 
 		//! @brief The DSP component used to produce sound
 		std::shared_ptr<DSP::DSP> _dsp;
diff --git a/sources/DSP/DSP.cpp b/sources/DSP/DSP.cpp
index bd04cb9..a17c35a 100644
--- a/sources/DSP/DSP.cpp
+++ b/sources/DSP/DSP.cpp
@@ -8,7 +8,13 @@
 namespace ComSquare::APU::DSP
 {
 	DSP::DSP()
-	{ }
+	{
+		for (auto & _channel : this->_channels) {
+			_channel.setBuffer(this->_soundBuffer);
+			_channel.setLoop(true);
+			_channel.play();
+		}
+	}
 
 	uint8_t DSP::read(uint24_t addr)
 	{
diff --git a/sources/DSP/DSP.hpp b/sources/DSP/DSP.hpp
index 24bab67..faab2bd 100644
--- a/sources/DSP/DSP.hpp
+++ b/sources/DSP/DSP.hpp
@@ -6,6 +6,7 @@
 #define COMSQUARE_DSP_HPP
 
 #include <cstdint>
+#include <SFML/Audio.hpp>
 #include "../Memory/IMemory.hpp"
 
 namespace ComSquare::APU::DSP
@@ -155,7 +156,14 @@ namespace ComSquare::APU::DSP
 
 	class DSP : public Memory::IMemory {
 	private:
+		//! @brief All registers of the DSP
 		Registers _registers{};
+
+		//! @brief 8x channels of sample used to make sound
+		sf::Sound _channels[8];
+
+		//! @brief A buffer containing current wave
+		sf::SoundBuffer _soundBuffer;
 	public:
 		explicit DSP();