virtual void create_audio_elements ();
virtual void stop_translation_timestep ();
virtual void start_translation_timestep ();
private:
Link_array<Audio_piano_pedal> audios_;
virtual void create_audio_elements ();
virtual void stop_translation_timestep ();
virtual void start_translation_timestep ();
private:
Link_array<Audio_piano_pedal> audios_;