en.yml in head_music-5.0.0

- old
+ new

@@ -101,10 +101,11 @@
       wood: wood
       woodwind: woodwind
     instrument_voices:
       piccolo: piccolo
       soprano: soprano
+      mezzo_soprano: mezzo-soprano
       alto: alto
       tenor: tenor
       baritone: baritone
       bass: bass
       contrabass: contrabass
@@ -250,10 +251,11 @@
       scientific: scientific pitch
       stuttgart: Stuttgart pitch
       sydney_symphony_orchestra: Sydney Symphony Orchestra
       verdi: Verdi tuning
     rudiments:
+      alteration: alteration
       chromatic_interval: chromatic interval
       circle: circle
       clef: clef
       consonance: consonance
       diatonic_interval: diatonic interval
@@ -277,10 +279,9 @@
       rhythm: rhythm
       rhythmic_unit: rhythmic unit
       scale: scale
       scale_degree: scale degree
       scale_type: scale type
-      sign: sign
       solmization: solmization
       sonority: sonority
       spelling: spelling
       staff: staff
       tuba: tuba