@make_label_duration()
@make_label_duration(start:numeric)
@make_label_duration(start:numeric, stop:numeric)
returns a map associating to the label of an event, the duration of this event. Events with no label do not appear in the map.

Called with no arguments, the events considered are all the events in the score. With a start, only the events whose position in beats is greater than start are considered. If a stop is specified, all events must have a position in beats between start and stop.

See also the Antescofo Score @bach_score   @make_bpm_map   @make_bpm_tab   @make_duration_map   @make_duration_tab   @make_label_bpm   @make_label_duration   @make_label_pitches   @make_label_pos   @make_pitch_tab   @make_score_map   @score_tempi   @score_duration    @specified_duration