diff --git a/bin/keyboardcomposer b/bin/keyboardcomposer
--- a/bin/keyboardcomposer
+++ b/bin/keyboardcomposer
@@ -236,7 +236,7 @@ class KeyboardComposer(tk.Frame, SubClie
         self.codeWatcher = CodeWatcher(
             onChange=lambda: self.graph.addHandler(self.redraw_sliders))
 
-        self.send_levels_loop(delay=.05)
+        self.send_levels_loop(periodSec=.05)
         self.graph.addHandler(self.rowFromGraph)
 
     def make_buttons(self):