startTimeSeconds: modelFrameToTime()

in src/toMidi.ts [594:604]


      startTimeSeconds: modelFrameToTime(note.startFrame),
      durationSeconds:
        modelFrameToTime(note.startFrame + note.durationFrames) -
        modelFrameToTime(note.startFrame),
    };
  });

export function generateFileData(notes: NoteEventTime[]): Buffer {
  const midi = new Midi();
  const track = midi.addTrack();
  notes.forEach(note => {