class All_font_metrics;
class Audio_column;
-class Audio_control_function_value_change;
+class Audio_control_change;
class Audio_dynamic;
class Audio_element;
class Audio_instrument;
class Lyric_performer;
class Mensural_ligature_engraver;
class Midi_chunk;
-class Midi_control_function_value_change;
+class Midi_control_change;
+class Midi_control_change_announcer;
class Midi_duration;
class Midi_dynamic;
class Midi_event;