diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 0c08433..eabc1e2 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -1,6 +1,7 @@
 cmake_minimum_required(VERSION 3.13)
 
 project(System3 LANGUAGES CXX)
+set(CMAKE_CXX_STANDARD 14)
 
 # In msys, `pkg-config --libs` returns `-lmingw32` but find_library() cannot
 # find it in default search paths.
@@ -23,6 +24,7 @@ if (ANDROID)
 elseif (EMSCRIPTEN)
   add_executable(system3)
 
+  set(SRC_MAKO sys/mako_midi.cpp)
   set(SRC_PLATFORM
 	linux/nact_linux.cpp
 	emscripten/mako.cpp
diff --git a/src/emscripten/mako.cpp b/src/emscripten/mako.cpp
index f81dc2a..4e000c3 100644
--- a/src/emscripten/mako.cpp
+++ b/src/emscripten/mako.cpp
@@ -3,15 +3,19 @@
 	[ MAKO ]
 */
 
+#include <memory>
 #include <emscripten.h>
 #include "mako.h"
+#include "mako_midi.h"
 
-MAKO::MAKO(NACT* parent, const char* playlist)
-	: current_music(0)
-	, next_loop(0)
+MAKO::MAKO(NACT* parent, const char* playlist) :
+	current_music(0),
+	next_loop(0),
+	nact(parent)
 {
+	strcpy(amus, "AMUS.DAT");
 	for (int i = 1; i <= 99; i++)
-		cd_track[i] = i;
+		cd_track[i] = 0;
 }
 
 void MAKO::play_music(int page)
@@ -19,8 +23,22 @@ void MAKO::play_music(int page)
 	if (current_music == page)
 		return;
 
-	EM_ASM_ARGS({ xsystem35.cdPlayer.play($0, $1); },
-				cd_track[page] + 1, next_loop ? 0 : 1);
+	int track = page < 100 ? cd_track[page] : 0;
+	if (track) {
+		EM_ASM_ARGS({ xsystem35.cdPlayer.play($0, $1); },
+					cd_track[page] + 1, next_loop ? 0 : 1);
+	} else {
+		auto midi = std::make_unique<MAKOMidi>(nact, amus);
+		if (!midi->load_mml(page)) {
+			WARNING("load_mml(%d) failed", page);
+			return;
+		}
+		midi->load_mda(page);
+		std::vector<uint8_t> smf = midi->generate_smf(next_loop);
+
+		EM_ASM_ARGS({ xsystem35.midiPlayer.play($0, $1, $2); },
+					next_loop, smf.data(), smf.size());
+	}
 
 	current_music = page;
 	next_loop = 0;
@@ -28,8 +46,13 @@ void MAKO::play_music(int page)
 
 void MAKO::stop_music()
 {
-	if (current_music)
-		EM_ASM( xsystem35.cdPlayer.stop(); );
+	if (!current_music)
+		return;
+
+	EM_ASM({
+		xsystem35.cdPlayer.stop();
+		xsystem35.midiPlayer.stop();
+	});
 
 	current_music = 0;
 }