3 texidoc="Festival song synthesis output supports
4 changing tempo in the middle of a piece.
9 \festival #"song-tempo.xml" { \tempo 4=90 }
12 \relative { c'4 e g \tempo 4=60 c, e g }
13 \addlyrics { do re mi do re mi }
15 #(ly:progress "song-tempo")
16 #(ly:progress "~a" (ly:gulp-file "song-tempo.xml"))