song2: keys: Define key at the beginning.

diff --git a/02-song2/parts/keys.ly b/02-song2/parts/keys.ly
index c267e96..01242bc 100644 (file)
--- a/02-song2/parts/keys.ly
+++ b/02-song2/parts/keys.ly
@@ -80,6 +80,7 @@ keyboard = \new PianoStaff \with {
   \new Staff \relative c' {
     %% Intro
     \time 4/4
+    \key b \minor
     R1*8
 
     \repeat unfold 2 {