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Notesのduration tickを計算する

Last updated at Posted at 2019-07-15

MIDI.jlのNotesのdurationを計算する。
ほぼstructの要素を操作して最大を取る時のスニペット。


function duration_tick(notes::Notes)
    # notesはgetnotes時にpositionでソートされている.
    starttick = notes[1].position
    endtick = maximum(map(note->note.position + note.duration, notes))
    return endtick - starttick
end

notes = MIDI.getnotes(track, TPQ)
duration = duration_tick(notes)
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