diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..80d24ac
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "lib/midi"]
+	path = lib/midi
+	url = git@engi.evolpe.it:pi/midi.git
diff --git a/Makefile b/Makefile
index 5685dc3..b18b820 100644
--- a/Makefile
+++ b/Makefile
@@ -1,9 +1,12 @@
 MAKEFLAGS="-j $(grep -c ^processor /proc/cpuinfo)"
 CXXFLAGS:=$(CXXFLAGS) -std=c++20 -Wall -Wextra -Werror=switch -Werror=return-type -Werror=unused-result
-CPPFLAGS:=$(CPPFLAGS) -Ilib/expected/ -Ilib/ut/ -Isrc/
+CPPFLAGS:=$(CPPFLAGS) -Ilib/expected/ -Ilib/ut/ -Ilib/midi/include -Isrc/
 RELEASE_FLAGS=-O3
 DEBUG_FLAGS=-O0 -ggdb
 
+LDFLAGS=-L./lib/midi/
+LDLIBS=-lmidi-alsa -lasound
+
 Obj=                 \
 		environment.o    \
 		errors.o         \
@@ -29,8 +32,8 @@ debug: bin/debug/musique
 bin/%.o: src/%.cc src/*.hh
 	g++ $(CXXFLAGS) $(RELEASE_FLAGS) $(CPPFLAGS) -o $@ $< -c
 
-bin/musique: $(Release_Obj) bin/main.o src/*.hh
-	g++ $(CXXFLAGS) $(RELEASE_FLAGS) $(CPPFLAGS) -o $@ $(Release_Obj) bin/main.o
+bin/musique: $(Release_Obj) bin/main.o src/*.hh lib/midi/libmidi-alsa.a
+	g++ $(CXXFLAGS) $(RELEASE_FLAGS) $(CPPFLAGS) -o $@ $(Release_Obj) bin/main.o $(LDFLAGS) $(LDLIBS)
 
 bin/debug/musique: $(Debug_Obj) bin/debug/main.o src/*.hh
 	g++ $(CXXFLAGS) $(DEBUG_FLAGS) $(CPPFLAGS) -o $@ $(Debug_Obj) bin/debug/main.o
diff --git a/README.md b/README.md
index fafe112..7806d7d 100644
--- a/README.md
+++ b/README.md
@@ -5,6 +5,22 @@ Interpreter języka Musique. Możliwy do wykorzystywania jako:
 - biblioteka interpretera języka dołączana do innego projektu (podobnie jak Lua);
 - REPL działający w systemie GNU/Linux + ALSA wykonujący język Musique.
 
+## Budowanie interpretera
+
+Jeśli nie posiadasz zależności `lib/midi` to:
+
+```console
+$ git submodule init
+$ git submodule update
+$ (cd lib/midi; make)
+```
+
+A następnie zbuduj interpreter:
+
+```console
+$ make bin/musique
+```
+
 ## Dostępne komendy
 
 - `make` - Buduje interpreter `bin/musique` (tryb release)
diff --git a/lib/midi b/lib/midi
new file mode 160000
index 0000000..fb7d285
--- /dev/null
+++ b/lib/midi
@@ -0,0 +1 @@
+Subproject commit fb7d28563bf731b0a689ce9902dfad0ec9e63b19
diff --git a/src/main.cc b/src/main.cc
index f14941d..93a49e1 100644
--- a/src/main.cc
+++ b/src/main.cc
@@ -1,9 +1,11 @@
-#include <iostream>
-#include <musique.hh>
-
 #include <filesystem>
-#include <span>
 #include <fstream>
+#include <iostream>
+#include <span>
+
+#include <musique.hh>
+#define MIDI_ENABLE_ALSA_SUPPORT
+#include <midi.hh>
 
 namespace fs = std::filesystem;
 
@@ -23,12 +25,12 @@ void usage()
 		"usage: musique <options> [filename]\n"
 		"  where filename is path to file with Musique code that will be executed\n"
 		"  where options are:\n"
-		"    -c CODE\n"
-		"    --run CODE\n"
+		"    -c,--run CODE\n"
 		"      executes given code\n"
-		"\n"
 		"    --ast\n"
-		"      prints ast for given code\n";
+		"      prints ast for given code\n"
+		"    -l,--list\n"
+		"      lists all available MIDI ports and quit\n";
 	std::exit(1);
 }
 
@@ -65,6 +67,13 @@ static Result<void> Main(std::span<char const*> args)
 			continue;
 		}
 
+		if (arg == "-l" || arg == "--list") {
+			midi::ALSA alsa("musique");
+			alsa.init_sequencer();
+			alsa.list_ports(std::cout);
+			return {};
+		}
+
 		if (arg == "-c" || arg == "--run") {
 			if (args.empty()) {
 				std::cerr << "musique: error: option " << arg << " requires an argument" << std::endl;