@make_bpm_map()
@make_bpm_map(start:numeric)
@make_bpm_map(start:numeric, stop:numeric)

returns a map where the BPM of the ith event of the score, is associated to i (the keys of the map are the ranks of the events). Called with no arguments, the events considered are all the events in the score.

With start, only the events whose position in beat is greater than start are considered.

If a stop is specified, all events must have a position in beat between start and stop.

Nota Bene: The numbering of musical events starts at 1. Grace notes, i.e. musical event with a bpm of 0, do not appear in the map and does not count in the ranking.

For example 

       NOTE D6 1    event1
       NOTE C7 0    event2
       NOTE D6 1/2  event3
       BPM 30
       NOTE C7 1/5
       CHORD (D1 A7 Eb7) 1/8 event5
       trill (CC6 D7 A7) 1/8 event6
with this score, @make_bpm_map() will return: 
       MAP{ (1, 60.0), (2, 60.0), (3, 30.0), (4, 30.0), (5, 30.0) }
Notice the grace note C7 which does not appear in the map.

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