diff --git a/midi2beep.py b/midi2beep.py
index 60de8e8..66ba284 100644
--- a/midi2beep.py
+++ b/midi2beep.py
@@ -54,7 +54,8 @@ else:
 time = 0
 note_on = 0
 start = 0
-tempo = 0
+tempo = 500000
+
 try:
   for msg in mid:
     time += msg.time