diff --git a/src/audio.rs b/src/audio.rs
new file mode 100644
index 0000000..9159d19
--- /dev/null
+++ b/src/audio.rs
@@ -0,0 +1,39 @@
+use bevy::prelude::*;
+
+#[derive(Component)]
+pub struct ComponentBGM;
+
+#[derive(Resource)]
+struct SoundBGM(Handle<AudioSource>);
+
+pub fn setup(
+    mut commands: Commands,
+    asset_server: Res<AssetServer>,
+) {
+    let bgm = SoundBGM(asset_server.load("restricted/FTL - Faster Than Light (2012) OST - 12 - Void (Explore)-edQw2yYXQJM.ogg"));
+    commands.spawn((
+        AudioBundle {
+            source: bgm.0.clone(),
+            settings: PlaybackSettings::LOOP,
+        },
+        ComponentBGM,
+    ));
+    commands.insert_resource(bgm);
+    commands.spawn((
+        AudioBundle {
+            source: asset_server.load("sounds/wakeup.ogg"),
+            settings: PlaybackSettings::DESPAWN,
+        },
+    ));
+}
+
+pub fn toggle_bgm(
+    keyboard_input: Res<ButtonInput<KeyCode>>,
+    bgm_controller: Query<&AudioSink, With<ComponentBGM>>,
+) {
+    if keyboard_input.just_pressed(KeyCode::KeyT) {
+        if let Ok(sink) = bgm_controller.get_single() {
+            sink.toggle()
+        }
+    }
+}
diff --git a/src/main.rs b/src/main.rs
index 0d0ab6e..95baade 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,3 +1,5 @@
+mod audio;
+
 use bevy::{
     asset::LoadState,
     window::{
@@ -16,10 +18,14 @@ use bevy::{
 
 fn main() {
     App::new()
-        .add_systems(Startup, setup)
+        .add_systems(Startup, (
+                setup,
+                audio::setup,
+        ))
         .add_systems(Update, (
                 asset_loaded.after(load_cubemap_asset),
-                handle_input
+                handle_input,
+                audio::toggle_bgm,
         ))
         .add_plugins(DefaultPlugins.set(ImagePlugin::default_nearest()))
         .add_plugins(CameraControllerPlugin)
@@ -40,11 +46,6 @@ const CUBEMAPS: &[(&str, CompressedImageFormats)] = &[
     ),
 ];
 
-#[derive(Component)]
-struct ComponentBGM;
-#[derive(Resource)]
-struct SoundBGM(Handle<AudioSource>);
-
 
 fn setup(
     mut commands: Commands,
@@ -58,23 +59,6 @@ fn setup(
         window.mode = WindowMode::Fullscreen;
     }
 
-    // Sound
-    let bgm = SoundBGM(asset_server.load("restricted/FTL - Faster Than Light (2012) OST - 12 - Void (Explore)-edQw2yYXQJM.ogg"));
-    commands.spawn((
-        AudioBundle {
-            source: bgm.0.clone(),
-            settings: PlaybackSettings::LOOP,
-        },
-        ComponentBGM,
-    ));
-    commands.insert_resource(bgm);
-    commands.spawn((
-        AudioBundle {
-            source: asset_server.load("sounds/wakeup.ogg"),
-            settings: PlaybackSettings::DESPAWN,
-        },
-    ));
-
     // camera
     commands.spawn((
         Camera3dBundle {
@@ -151,14 +135,8 @@ fn asset_loaded(
 
 fn handle_input(
     keyboard_input: Res<ButtonInput<KeyCode>>,
-    bgm_controller: Query<&AudioSink, With<ComponentBGM>>,
     mut app_exit_events: ResMut<Events<bevy::app::AppExit>>
 ) {
-    if keyboard_input.just_pressed(KeyCode::KeyT) {
-        if let Ok(sink) = bgm_controller.get_single() {
-            sink.toggle()
-        }
-    }
     if keyboard_input.pressed(KeyCode::KeyQ) {
         app_exit_events.send(bevy::app::AppExit);
     }