disp_audio->set_time_adjustment(&time_adjustment());
disp_audio->signal_start_scrubbing().connect(
sigc::mem_fun(*audio,&AudioContainer::start_scrubbing)
disp_audio->set_time_adjustment(&time_adjustment());
disp_audio->signal_start_scrubbing().connect(
sigc::mem_fun(*audio,&AudioContainer::start_scrubbing)