diff --git a/qml/Desktop.qml b/qml/Desktop.qml
index 942c1d8..65894e2 100644
--- a/qml/Desktop.qml
+++ b/qml/Desktop.qml
@@ -33,6 +33,7 @@ Item {
 	}
 
 	ObjectSaver {
+		id: saver
 		filename: "config.dat"
 		object: Config
 	}
diff --git a/src/' b/src/'
deleted file mode 100644
index 0abbd7e..0000000
--- a/src/'
+++ /dev/null
@@ -1,168 +0,0 @@
-/* Copyright 2016 (C) Louis-Joseph Fournier 
- * louisjoseph.fournier@gmail.com
- *
- * This file is part of SailTuner.
- *
- * SailTuner is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * SailTuner is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- */
-
-#include <QDBusConnection>
-#include <QDBusInterface>
-
-#include <iostream>
-#include <fstream>
-
-#include "TunerWorker.hpp"
-
-using namespace std;
-
-/// file name to record audio
-
-const char * TunerWorker::filename_record = NULL;
-
-/// function to prevent screen blank on Sailfish OS
-
-static void blank_prevent(bool prevent)
-{
-	cerr << __func__ << " " << prevent << endl;
-	QDBusConnection system = QDBusConnection::connectToBus(QDBusConnection::SystemBus, "system");
-	QDBusInterface interface("com.nokia.mce", "/com/nokia/mce/request", "com.nokia.mce.request", system);
-
-	if (prevent) {
-		interface.call(QLatin1String("req_display_blanking_pause"));
-	} else {
-		interface.call(QLatin1String("req_display_cancel_blanking_pause"));
-	}
-}
-
-TunerWorker::TunerWorker() :
-	running(false),
-	quit(false),
-	la_to_update(0),
-	temperament_to_update(-1)
-{
-}
-
-TunerWorker::~TunerWorker()
-{
-}
-
-void TunerWorker::Start()
-{
-	cerr << __func__ << endl;
-	mutex.lock();
-	running = true;
-	condition.wakeOne();
-	mutex.unlock();
-}
-
-void TunerWorker::Stop()
-{
-	cerr << __func__ << endl;
-	mutex.lock();
-	running = false;
-	mutex.unlock();
-}
-
-void TunerWorker::Quit()
-{
-	mutex.lock();
-	running = false;
-	quit = true;
-	condition.wakeOne();
-	mutex.unlock();
-}
-
-void TunerWorker::SetLa(double la)
-{
-	mutex.lock();
-	la_to_update = la;
-	mutex.unlock();
-}
-
-void TunerWorker::SetTemperamentIndex(int idx)
-{
-	mutex.lock();
-	temperament_to_update = idx;
-	mutex.unlock();
-}
-
-void TunerWorker::Entry()
-{
-	cerr << __func__ << endl;
-
-	int nbSamplePreventRunning = nbSecPreventRunning * PitchDetection::rate;
-	int nb_sample_running = 0;
-
-	ofstream *file = NULL;
-	if (filename_record) file = new ofstream(filename_record);
-
-	PitchDetection *pitchDetection = new PitchDetection();
-	emit temperamentListUpdated(pitchDetection->GetTemperamentList());
-
-	while (1) {
-		// wait for running
-		mutex.lock();
-		if (!running) {
-			blank_prevent(false);
-			while (!running && !quit) condition.wait(&mutex);
-			cerr << "wake-up" << endl;
-			// reset operations on start
-			if (!quit) {
-				pitchDetection->Reset();
-				nb_sample_running = 0;
-			}
-		}
-		if (quit) {
-			mutex.unlock();
-			break;
-		}
-		// update config
-		if (la_to_update) {
-			pitchDetection->SetLa(la_to_update);
-			la_to_update = 0;
-		}
-		if (temperament_to_update != -1) {
-			pitchDetection->SetTemperament(temperament_to_update);
-			temperament_to_update = -1;
-		}
-		mutex.unlock();
-
-		// record in file is needed
-		//if (file) file_record.write((char*) ptr, nb_frame * sizeof(int16_t));
-
-		std::cout << __func__ << " do job" << std::endl;
-	}
-
-	delete pitchDetection;
-
-	if (file) {
-		file->close();
-		delete file;
-	}
-
-	cerr << __func__ << " quit" << endl;
-/*
-	// prevent screen blanking
-	if (nb_sample_running >= nbSamplePreventRunning && running) {
-		nb_sample_running = 0;
-		blank_prevent(true);
-	}*/
-}
-
-/// Set a filename to record raw audio stream
-
-void TunerWorker::set_record(const char *f)
-{
-	filename_record = f;
-}
-
diff --git a/src/ObjectSaver.cpp b/src/ObjectSaver.cpp
index 3181f10..1c2ac93 100644
--- a/src/ObjectSaver.cpp
+++ b/src/ObjectSaver.cpp
@@ -121,18 +121,20 @@ void ObjectSaver::load()
 	// load object from file
 	QMetaProperty property;
 	const QMetaObject *meta = object->metaObject();
-	QString title, value;
-	const char *t;
+	QByteArray title;
+	QString value;
 	int offset;
-	char c;
+	bool ok;
 
 	while (!file->atEnd()) {
 		title = file->readLine(100).trimmed();
-		t = title.toStdString().c_str();
-		offset = meta->indexOfProperty(t);
+		offset = meta->indexOfProperty(title.constData());
 		if (offset != -1 && !file->atEnd() && type_ok(meta->property(offset).type())) {
 			value = file->readLine(100).trimmed();
-			if (!object->setProperty(t, value /*value.toInt(&ok, 10)*/)) {
+
+			ok = object->setProperty(title.constData(), value);
+
+			if (!ok) {
 				qDebug() << __func__  << " set property " << title << " to " << value << " failed";
 			}
 			else {