XMLNode& MidiModel::DeltaCommand::get_state()
{
XMLNode *delta_command = new XMLNode(DELTA_COMMAND_ELEMENT);
- delta_command->add_property("midi_source", _model->midi_source()->id().to_s());
+ delta_command->add_property("midi-source", _model->midi_source()->id().to_s());
XMLNode *added_notes = delta_command->add_child(ADDED_NOTES_ELEMENT);
for_each(_added_notes.begin(), _added_notes.end(), sigc::compose(