ADD_ACKNOWLEDGER (Piano_pedal_align_engraver, note_column);
ADD_ACKNOWLEDGER (Piano_pedal_align_engraver, piano_pedal_bracket);
ADD_ACKNOWLEDGER (Piano_pedal_align_engraver, piano_pedal_script);
ADD_ACKNOWLEDGER (Piano_pedal_align_engraver, note_column);
ADD_ACKNOWLEDGER (Piano_pedal_align_engraver, piano_pedal_bracket);
ADD_ACKNOWLEDGER (Piano_pedal_align_engraver, piano_pedal_script);