diff --git a/default_bus_layout.tres b/default_bus_layout.tres
new file mode 100644
index 0000000..052f901
--- /dev/null
+++ b/default_bus_layout.tres
@@ -0,0 +1,9 @@
+[gd_resource type="AudioBusLayout" format=3 uid="uid://cpmscnqvdpn8f"]
+
+[resource]
+bus/1/name = &"SFX"
+bus/1/solo = false
+bus/1/mute = false
+bus/1/bypass_fx = false
+bus/1/volume_db = 0.0
+bus/1/send = &"Master"
diff --git a/project.godot b/project.godot
index d79aa12..4bc40cf 100644
--- a/project.godot
+++ b/project.godot
@@ -21,6 +21,7 @@ config/icon="res://icon.svg"
 
 ControllerIcons="*uid://b7ho1rjcpht1d"
 GameData="*uid://d4beiel88cwc7"
+UiAudio="*uid://7e7fe2xk3aue"
 
 [display]
 
diff --git a/scripts/main_menu.gd b/scripts/main_menu.gd
index 44bcf07..77c7916 100644
--- a/scripts/main_menu.gd
+++ b/scripts/main_menu.gd
@@ -10,6 +10,7 @@ extends Node
 
 @export var progression_backgrounds: Array[Texture2D] = []
 @export var menu_music: AudioStream
+@export var start_click_sound: AudioStream
 
 const GAME_SCENE_PATH := "res://scenes/main.tscn"
 const MUSIC_FADE_DURATION := 0.8
@@ -53,8 +54,12 @@ func fade_in_game_infos() -> void:
 func _on_start_pressed() -> void:
 	if is_transitioning: return
 	is_transitioning = true
+	play_click_sound()
 	start_transition_to(GAME_SCENE_PATH)
 
+func play_click_sound() -> void:
+	UiAudio.play(start_click_sound)
+
 func _on_quit_pressed() -> void:
 	get_tree().quit()
 
diff --git a/scripts/ui_audio.gd b/scripts/ui_audio.gd
new file mode 100644
index 0000000..6ce4a39
--- /dev/null
+++ b/scripts/ui_audio.gd
@@ -0,0 +1,18 @@
+extends Node
+# Autoload : UiAudio
+# Gère les sons d'interface (boutons, menus, pause...) indépendamment des scènes,
+# pour qu'un son ne soit jamais coupé par un changement de scène.
+
+@export var bus : StringName = &"SFX" # doit exister dans Audio Bus Layout, sinon utilise "Master"
+
+func play(stream : AudioStream, volume_db : float = 0.0) -> void:
+	if !stream: return
+
+	var player := AudioStreamPlayer.new()
+	player.stream = stream
+	player.volume_db = volume_db
+	player.bus = bus if AudioServer.get_bus_index(bus) != -1 else &"Master"
+
+	add_child(player)
+	player.play()
+	player.finished.connect(player.queue_free)
diff --git a/scripts/ui_audio.gd.uid b/scripts/ui_audio.gd.uid
new file mode 100644
index 0000000..fb8ffd6
--- /dev/null
+++ b/scripts/ui_audio.gd.uid
@@ -0,0 +1 @@
+uid://7e7fe2xk3aue