virtual void thaw_after_trim ();
void set_silent_frames (const ARDOUR::AudioIntervalResult&, double threshold);
void drop_silent_frames ();
void hide_silent_frames ();
virtual void thaw_after_trim ();
void set_silent_frames (const ARDOUR::AudioIntervalResult&, double threshold);
void drop_silent_frames ();
void hide_silent_frames ();