diff --git a/README.md b/README.md
index ae22776..f0a635c 100644
--- a/README.md
+++ b/README.md
@@ -18,8 +18,7 @@ Target of sunshine mod - improve original game.
     * pixman
     * SDL3_image
     * SDL3_ttf
-    * [SDL3_sound](https://github.com/icculus/SDL_sound)
-    * OpenAL
+    * SDL3_mixer
     * PhysFS
     * sigc++-2.0
     * vorbisfile
diff --git a/binding-mri/audio-binding.cpp b/binding-mri/audio-binding.cpp
index caa7898..1a098ad 100644
--- a/binding-mri/audio-binding.cpp
+++ b/binding-mri/audio-binding.cpp
@@ -46,6 +46,15 @@ static VALUE rb_audio_destroyGroup(VALUE self, VALUE groupId) {
 	return Qnil;
 }
 
+static VALUE rb_audio_getMasterVolume(VALUE self) {
+	return DBL2NUM(shState->audio().getMasterVolume());
+}
+
+static VALUE rb_audio_setMasterVolume(VALUE self, VALUE volume) {
+	shState->audio().setMasterVolume(NUM2DBL(volume));
+	return Qnil;
+}
+
 static VALUE rb_audio_getGroupVolume(VALUE self, VALUE groupId) {
 	return DBL2NUM(shState->audio().getGroupVolume(FIX2INT(groupId)));
 }
@@ -108,6 +117,9 @@ void audioBindingInit(){
 	rb_define_singleton_method(module, "create_group", RUBY_METHOD_FUNC(rb_audio_createGroup), 0);
 	rb_define_singleton_method(module, "destroy_group", RUBY_METHOD_FUNC(rb_audio_destroyGroup), 1);
 
+	rb_define_singleton_method(module, "master_volume", RUBY_METHOD_FUNC(rb_audio_getMasterVolume), 0);
+	rb_define_singleton_method(module, "master_volume=", RUBY_METHOD_FUNC(rb_audio_setMasterVolume), 1);
+
 	rb_define_singleton_method(module, "get_group_volume", RUBY_METHOD_FUNC(rb_audio_getGroupVolume), 1);
 	rb_define_singleton_method(module, "set_group_volume", RUBY_METHOD_FUNC(rb_audio_setGroupVolume), 2);
 	rb_define_singleton_method(module, "stop_group_sounds", RUBY_METHOD_FUNC(rb_audio_stopGroupSounds), -1);
diff --git a/changelogs/0.1.2.txt b/changelogs/0.1.2.txt
index cf4d907..971bbb2 100644
--- a/changelogs/0.1.2.txt
+++ b/changelogs/0.1.2.txt
@@ -55,3 +55,5 @@ Fixed Office teleport bug
 Added Crash Screen
 Added In-Memory Log buffer
 Added setting "Use Old Self Contained Universe(Reprise) version"
+Rewrited audio system from SDL3_sound and OpenAL to SDL_mixer
+Added Master Volume setting
\ No newline at end of file
diff --git a/scripts/Data_Settings.rb b/scripts/Data_Settings.rb
index d371379..57f6e33 100644
--- a/scripts/Data_Settings.rb
+++ b/scripts/Data_Settings.rb
@@ -3,6 +3,7 @@ module Settings
     def reset!
       @data = {
         # Audio
+        :master_volume                           => 100,
         :bgm_volume                              => 100,
         :sfx_volume                              => 100,
         :use_fight_crime_track                   => false,
@@ -154,6 +155,13 @@ class Window_Settings
       },
     ],
     "Audio" => [
+      {
+        :type => :slider,
+        :name => "Master Volume",
+        :parameter => :master_volume,
+        :min => 0,
+        :max => 100
+      },
       {
         :type => :slider,
         :name => "BGM Volume",
diff --git a/scripts/Settings_Setters.rb b/scripts/Settings_Setters.rb
index 961c454..aa1dc6f 100644
--- a/scripts/Settings_Setters.rb
+++ b/scripts/Settings_Setters.rb
@@ -11,7 +11,9 @@ module Settings
 	  def crashlog_privacy(value)
 		Sunshine.crashprivacy=value
 	  end
-      
+      def master_volume(value)
+        Audio.master_volume = value / 100.0
+      end
       def bgm_volume(value)
         Audio.bgm_volume = value
       end
diff --git a/src/sound/audio.cpp b/src/sound/audio.cpp
index 5b5aa5b..6827588 100644
--- a/src/sound/audio.cpp
+++ b/src/sound/audio.cpp
@@ -123,6 +123,14 @@ void Audio::destroyGroup(int group) {
     p->groups[group] = nullptr;
 }
 
+float Audio::getMasterVolume() const {
+	return MIX_GetMixerGain(mixer);
+}
+
+void Audio::setMasterVolume(float volume) {
+	MIX_SetMixerGain(mixer, volume);
+}
+
 float Audio::getGroupVolume(int group) const {
 	AudioGroup* mixGroup = getGroup(group);
 	if (!mixGroup)
@@ -136,6 +144,7 @@ void Audio::setGroupVolume(int group, float volume) {
 	if (a_group)
 		a_group->setVolume(volume);
 }
+
 void Audio::stopSoundsInGroup(int group, float fadeoutTime) {
 	AudioGroup* a_group = getGroup(group);
 	if (a_group)
diff --git a/src/sound/audio.h b/src/sound/audio.h
index 5b3763c..42dcf8a 100644
--- a/src/sound/audio.h
+++ b/src/sound/audio.h
@@ -42,6 +42,9 @@ public:
 	AudioGroup* getGroup(int group) const;
 	void destroyGroup(int group);
 
+	float getMasterVolume() const;
+	void setMasterVolume(float volume);
+
 	float getGroupVolume(int group) const;
 	void setGroupVolume(int group, float volume);
 	void stopSoundsInGroup(int group, float fadeoutTime = 0.0f);