- for (AudioRegionSelection::iterator r = selection->audio_regions.begin(); r != selection->audio_regions.end(); ++r) {
- session->add_undo ((*r)->region.get_memento());
- (*r)->region.set_scale_amplitude (1.0f);
- session->add_redo_no_execute ((*r)->region.get_memento());
+ for (RegionSelection::iterator r = selection->regions.begin(); r != selection->regions.end(); ++r) {
+ AudioRegionView* const arv = dynamic_cast<AudioRegionView*>(*r);
+ if (!arv)
+ continue;
+ XMLNode &before = arv->region()->get_state();
+ arv->audio_region()->set_scale_amplitude (1.0f);
+ session->add_command (new MementoCommand<Region>(*(arv->region().get()), &before, &arv->region()->get_state()));