diff --git a/src/light9/midifade/midifade.py b/src/light9/midifade/midifade.py
--- a/src/light9/midifade/midifade.py
+++ b/src/light9/midifade/midifade.py
@@ -1,6 +1,9 @@
 #!bin/python
 """
 Read midi events, write fade levels to graph
+
+Device troubleshooting:
+    amidi -l
 """
 import asyncio
 import logging