diff --git a/docs/ARCHITECTURE.md b/docs/ARCHITECTURE.md
index 75eaac7..e71beaa 100644
--- a/docs/ARCHITECTURE.md
+++ b/docs/ARCHITECTURE.md
@@ -58,7 +58,7 @@ Le scene accessorie sono `options_menu.tscn`, `lock_menu.tscn` e `victory_overla
 
 - `shared/settings/settings.gd`: persiste i parametri in `user://settings.cfg`. Incrementare `VERSION` quando cambiano i valori predefiniti.
 - `shared/audio/audio_factory.gd`: genera e riproduce feedback sonori morbidi.
-- `menus/assets/audio/upendi_sign_drop_hf.wav` e `upendi_sign_bounce_hf.wav`: effetti dell’insegna generati con Hugging Face TangoFlux e riprodotti da `MenuAudio`.
+- `menus/assets/audio/upendi_sign_drop.wav` e `upendi_sign_bounce.wav`: effetti CC0 OpenGameArt dell’insegna, convertiti in WAV PCM sedici bit e riprodotti da `MenuAudio`.
 - `shared/ui/`: definisce tema, finiture e cornici circensi riusabili.
 - `shared/assets/`: contiene font e texture comuni.
 - `shared/branding/`: contiene logo UPENDI e risorse del boot splash.
diff --git a/menus/assets/audio/upendi_sign_bounce.wav b/menus/assets/audio/upendi_sign_bounce.wav
new file mode 100644
index 0000000..3cdbe39
Binary files /dev/null and b/menus/assets/audio/upendi_sign_bounce.wav differ
diff --git a/menus/assets/audio/upendi_sign_bounce.wav.import b/menus/assets/audio/upendi_sign_bounce.wav.import
new file mode 100644
index 0000000..90eb867
--- /dev/null
+++ b/menus/assets/audio/upendi_sign_bounce.wav.import
@@ -0,0 +1,24 @@
+[remap]
+
+importer="wav"
+type="AudioStreamWAV"
+uid="uid://drb4yw2tp74m3"
+path="res://.godot/imported/upendi_sign_bounce.wav-de9a54436e18f67098ab487f877643b2.sample"
+
+[deps]
+
+source_file="res://menus/assets/audio/upendi_sign_bounce.wav"
+dest_files=["res://.godot/imported/upendi_sign_bounce.wav-de9a54436e18f67098ab487f877643b2.sample"]
+
+[params]
+
+force/8_bit=false
+force/mono=false
+force/max_rate=false
+force/max_rate_hz=44100
+edit/trim=false
+edit/normalize=false
+edit/loop_mode=0
+edit/loop_begin=0
+edit/loop_end=-1
+compress/mode=2
diff --git a/menus/assets/audio/upendi_sign_bounce_hf.wav b/menus/assets/audio/upendi_sign_bounce_hf.wav
deleted file mode 100644
index 218bbe3..0000000
Binary files a/menus/assets/audio/upendi_sign_bounce_hf.wav and /dev/null differ
diff --git a/menus/assets/audio/upendi_sign_bounce_hf.wav.import b/menus/assets/audio/upendi_sign_bounce_hf.wav.import
deleted file mode 100644
index 54bb76f..0000000
--- a/menus/assets/audio/upendi_sign_bounce_hf.wav.import
+++ /dev/null
@@ -1,24 +0,0 @@
-[remap]
-
-importer="wav"
-type="AudioStreamWAV"
-uid="uid://bfh0dbx15frij"
-path="res://.godot/imported/upendi_sign_bounce_hf.wav-eebbcbad2e1fcce5d1c21f902e3800d0.sample"
-
-[deps]
-
-source_file="res://menus/assets/audio/upendi_sign_bounce_hf.wav"
-dest_files=["res://.godot/imported/upendi_sign_bounce_hf.wav-eebbcbad2e1fcce5d1c21f902e3800d0.sample"]
-
-[params]
-
-force/8_bit=false
-force/mono=false
-force/max_rate=false
-force/max_rate_hz=44100
-edit/trim=false
-edit/normalize=false
-edit/loop_mode=0
-edit/loop_begin=0
-edit/loop_end=-1
-compress/mode=2
diff --git a/menus/assets/audio/upendi_sign_drop.wav b/menus/assets/audio/upendi_sign_drop.wav
new file mode 100644
index 0000000..2d87a95
Binary files /dev/null and b/menus/assets/audio/upendi_sign_drop.wav differ
diff --git a/menus/assets/audio/upendi_sign_drop.wav.import b/menus/assets/audio/upendi_sign_drop.wav.import
new file mode 100644
index 0000000..19fc673
--- /dev/null
+++ b/menus/assets/audio/upendi_sign_drop.wav.import
@@ -0,0 +1,24 @@
+[remap]
+
+importer="wav"
+type="AudioStreamWAV"
+uid="uid://jhlcbd0mtjhi"
+path="res://.godot/imported/upendi_sign_drop.wav-485f7cd967f72e5f0964ed94ac11b7fd.sample"
+
+[deps]
+
+source_file="res://menus/assets/audio/upendi_sign_drop.wav"
+dest_files=["res://.godot/imported/upendi_sign_drop.wav-485f7cd967f72e5f0964ed94ac11b7fd.sample"]
+
+[params]
+
+force/8_bit=false
+force/mono=false
+force/max_rate=false
+force/max_rate_hz=44100
+edit/trim=false
+edit/normalize=false
+edit/loop_mode=0
+edit/loop_begin=0
+edit/loop_end=-1
+compress/mode=2
diff --git a/menus/assets/audio/upendi_sign_drop_hf.wav b/menus/assets/audio/upendi_sign_drop_hf.wav
deleted file mode 100644
index 0684042..0000000
Binary files a/menus/assets/audio/upendi_sign_drop_hf.wav and /dev/null differ
diff --git a/menus/assets/audio/upendi_sign_drop_hf.wav.import b/menus/assets/audio/upendi_sign_drop_hf.wav.import
deleted file mode 100644
index bc19787..0000000
--- a/menus/assets/audio/upendi_sign_drop_hf.wav.import
+++ /dev/null
@@ -1,24 +0,0 @@
-[remap]
-
-importer="wav"
-type="AudioStreamWAV"
-uid="uid://0ii6ln0m6r7a"
-path="res://.godot/imported/upendi_sign_drop_hf.wav-5bc8d90609665f16ebe2f7c6ecd79bc4.sample"
-
-[deps]
-
-source_file="res://menus/assets/audio/upendi_sign_drop_hf.wav"
-dest_files=["res://.godot/imported/upendi_sign_drop_hf.wav-5bc8d90609665f16ebe2f7c6ecd79bc4.sample"]
-
-[params]
-
-force/8_bit=false
-force/mono=false
-force/max_rate=false
-force/max_rate_hz=44100
-edit/trim=false
-edit/normalize=false
-edit/loop_mode=0
-edit/loop_begin=0
-edit/loop_end=-1
-compress/mode=2
diff --git a/menus/scripts/components/menu_audio.gd b/menus/scripts/components/menu_audio.gd
index 4ae0e7b..5e6c92d 100644
--- a/menus/scripts/components/menu_audio.gd
+++ b/menus/scripts/components/menu_audio.gd
@@ -2,8 +2,8 @@ class_name MenuAudio
 extends Node
 ## Feedback sonori brevi dei menu, separati dal gameplay.
 
-const SIGN_DROP := preload("res://menus/assets/audio/upendi_sign_drop_hf.wav")
-const SIGN_BOUNCE := preload("res://menus/assets/audio/upendi_sign_bounce_hf.wav")
+const SIGN_DROP := preload("res://menus/assets/audio/upendi_sign_drop.wav")
+const SIGN_BOUNCE := preload("res://menus/assets/audio/upendi_sign_bounce.wav")
 
 
 func play_tone(freq: float) -> void: