_film_changed_connection = _film->Changed.connect (bind (&AudioDialog::film_changed, this, _1));
_film_audio_analysis_finished_connection = _film->AudioAnalysisFinished.connect (bind (&AudioDialog::try_to_load_analysis, this));
_film_changed_connection = _film->Changed.connect (bind (&AudioDialog::film_changed, this, _1));
_film_audio_analysis_finished_connection = _film->AudioAnalysisFinished.connect (bind (&AudioDialog::try_to_load_analysis, this));