diff --git a/vinscant/mpfiles/lib/music.py b/vinscant/mpfiles/lib/music.py
index 8c88fbf..67a8586 100644
--- a/vinscant/mpfiles/lib/music.py
+++ b/vinscant/mpfiles/lib/music.py
@@ -9,7 +9,7 @@ def __init__(self, melody: io.IOBase, pin: Pin) -> None:
 
     @staticmethod
     def midi_to_freq(note: int):
-        return 440 * 2**((float(note) - 69) / 12)
+        return 440 * 2**((float(note) - 69) / 12) / 2
 
     def start(self):
         self.timer.init(mode=Timer.PERIODIC, freq=1, callback=self.playNote)