diff --git a/ESPHome/TX-Ultimate-Easy-ESPHome_addon_ble_proxy.yaml b/ESPHome/TX-Ultimate-Easy-ESPHome_addon_ble_proxy.yaml
index 20cc2f6..a18515c 100644
--- a/ESPHome/TX-Ultimate-Easy-ESPHome_addon_ble_proxy.yaml
+++ b/ESPHome/TX-Ultimate-Easy-ESPHome_addon_ble_proxy.yaml
@@ -12,7 +12,9 @@
 ####################################################################################################
 ---
 substitutions:
-  tone_volume_change: "scale_up:d=32,o=5,b=100:c,c#,d#,e,f#,g#,a#,b"  # Use to "none" for no sound
+  # RTTTL format: name:d=duration,o=octave,b=tempo:notes
+  # d=32 (32nd note), o=5 (octave 5), b=100 (tempo 100)
+  tone_volume_change: "scale_up:d=32,o=5,b=100:c,c#,d#,e,f#,g#,a#,b"  # Use "none" to disable sound
 
 api:
   actions:
diff --git a/ESPHome/TX-Ultimate-Easy-ESPHome_core_hw_speaker.yaml b/ESPHome/TX-Ultimate-Easy-ESPHome_core_hw_speaker.yaml
index 7833b18..2addc80 100644
--- a/ESPHome/TX-Ultimate-Easy-ESPHome_core_hw_speaker.yaml
+++ b/ESPHome/TX-Ultimate-Easy-ESPHome_core_hw_speaker.yaml
@@ -23,7 +23,7 @@ media_player:
     platform: i2s_audio
     i2s_dout_pin: GPIO15
     i2s_audio_id: if_i2s_audio
-    i2s_comm_fmt: lsb
+    i2s_comm_fmt: msb  # Experimental - It was 'lsb' until v2024.12.12
     dac_type: external
     mode: mono
 ...