patchbay->synchronize_faders(change, TRACK_AUDIO, track);
mwindow->undo->update_undo_after(_("fade"), LOAD_AUTOMATION);
change_source = 0;
patchbay->synchronize_faders(change, TRACK_AUDIO, track);
mwindow->undo->update_undo_after(_("fade"), LOAD_AUTOMATION);
change_source = 0;