diff --git a/DroidStar.pro b/DroidStar.pro
index b0ac966..9f0afa9 100644
--- a/DroidStar.pro
+++ b/DroidStar.pro
@@ -5,7 +5,7 @@ equals(QT_MAJOR_VERSION, 5){
 }
 
 unix:!ios:QT += serialport
-CONFIG += c++11
+CONFIG += c++17
 LFLAGS +=
 android:INCLUDEPATH += $$(HOME)/Android/local/include
 LIBS += -limbe_vocoder  -lvocoder
diff --git a/audioengine.cpp b/audioengine.cpp
index 2f0caba..f730975 100644
--- a/audioengine.cpp
+++ b/audioengine.cpp
@@ -176,20 +176,15 @@ QStringList AudioEngine::discover_audio_devices(uint8_t d)
 void AudioEngine::init()
 {
 	QAudioFormat format;
-	QAudioFormat tempformat;
 	format.setSampleRate(8000);
 	format.setChannelCount(1);
 	format.setSampleFormat(QAudioFormat::Int16);
-	//format.setSampleSize(16);
-	//format.setCodec("audio/pcm");
-	//format.setByteOrder(QAudioFormat::LittleEndian);
-	//format.setSampleType(QAudioFormat::SignedInt);
 
 	m_agc = true;
 
 	QList<QAudioDevice> devices = QMediaDevices::audioOutputs();
 	if(devices.size() == 0){
-		fprintf(stderr, "No audio playback hardware found\n");fflush(stderr);
+        qDebug() << "No audio playback hardware found";
 	}
 	else{
 		QAudioDevice device(QMediaDevices::defaultAudioOutput());
@@ -204,25 +199,20 @@ void AudioEngine::init()
 			}
 		}
 		if (!device.isFormatSupported(format)) {
-			qWarning() << "Raw audio format not supported by backend, trying nearest format.";
-			//tempformat = device.nearestFormat(format);
-			//qWarning() << "Format now set to " << format.sampleRate() << ":" << format.sampleSize();
-		}
-		else{
-			tempformat = format;
-		}
-		fprintf(stderr, "Using playback device %s\n", device.description().toStdString().c_str());fflush(stderr);
+            qWarning() << "Raw audio format not supported by playback device";
+        }
 
-		m_out = new QAudioSink(device, tempformat, this);
+        qDebug() << "Playback device: " << device.description() << "SR: " << format.sampleRate();
+
+        m_out = new QAudioSink(device, format, this);
 		m_out->setBufferSize(1280);
 		connect(m_out, SIGNAL(stateChanged(QAudio::State)), this, SLOT(handleStateChanged(QAudio::State)));
-		//m_outdev = m_out->start();
 	}
 
 	devices = QMediaDevices::audioInputs();
 
-	if(devices.size() == 0){
-		fprintf(stderr, "No audio recording hardware found\n");fflush(stderr);
+    if(devices.size() == 0){
+        qDebug() <<  "No audio capture hardware found";
 	}
 	else{
 		QAudioDevice device(QMediaDevices::defaultAudioInput());
@@ -237,13 +227,8 @@ void AudioEngine::init()
 			}
 		}
 		if (!device.isFormatSupported(format)) {
-			qWarning() << "Raw audio format not supported by backend, trying nearest format.";
-			//tempformat = device.nearestFormat(format);
-			//qWarning() << "Format now set to " << format.sampleRate() << ":" << format.sampleSize();
-		}
-		else{
-			tempformat = format;
-		}
+            qWarning() << "Raw audio format not supported by capture device";
+        }
 
 		int sr = 8000;
 		if(MACHAK){
@@ -251,11 +236,9 @@ void AudioEngine::init()
 			m_srm = (float)sr / 8000.0;
 		}
 		format.setSampleRate(sr);
-		m_in = new QAudioSource(device, format, this);
-		fprintf(stderr, "Capture device: %s SR: %d resample factor: %f\n", device.description().toStdString().c_str(), sr, m_srm);fflush(stderr);
+        m_in = new QAudioSource(device, format, this);
+        qDebug() << "Capture device: " <<  device.description() << " SR: " << sr << " resample factor: " << m_srm;
 	}
-
-	//start_playback();
 }
 #endif
 
diff --git a/dmr.cpp b/dmr.cpp
index 381ad63..56c03c7 100755
--- a/dmr.cpp
+++ b/dmr.cpp
@@ -188,7 +188,7 @@ void DMR::process_udp()
 		(m_modeinfo.status == CONNECTED_RW))
 	{
 		m_rxwatchdog = 0;
-		uint8_t t;
+        uint8_t t = 0;
 		if((uint8_t)buf.data()[15] & 0x02){
 			qDebug() << "DMR RX EOT";
 			m_modeinfo.stream_state = STREAM_END;
diff --git a/droidstar.cpp b/droidstar.cpp
index c6b5401..4af2356 100644
--- a/droidstar.cpp
+++ b/droidstar.cpp
@@ -417,7 +417,7 @@ void DroidStar::process_connect()
 		m_modethread->start();
 
 	}
-
+/*
 	qDebug() << "process_connect called m_callsign == " << m_callsign;
 	qDebug() << "process_connect called m_dmrid == " << m_dmrid;
 	qDebug() << "process_connect called m_bm_password == " << m_bm_password;
@@ -428,6 +428,7 @@ void DroidStar::process_connect()
 	qDebug() << "process_connect called m_module == " << m_module;
 	qDebug() << "process_connect called m_protocol == " << m_protocol;
 	qDebug() << "process_connect called m_port == " << m_port;
+*/
 }
 
 void DroidStar::process_host_change(const QString &h)
@@ -720,7 +721,7 @@ void DroidStar::process_dstar_hosts(QString m)
             }
 
             m_customhosts = m_localhosts.split('\n');
-            for (const auto& i : qAsConst(m_customhosts)){
+            for (const auto& i : std::as_const(m_customhosts)){
                 QStringList line = i.simplified().split(' ');
 
                 if(line.at(0) == m){
@@ -761,7 +762,7 @@ void DroidStar::process_ysf_hosts()
 			}
 
 			m_customhosts = m_localhosts.split('\n');
-			for (const auto& i : qAsConst(m_customhosts)){
+            for (const auto& i : std::as_const(m_customhosts)){
 				QStringList line = i.simplified().split(' ');
 
 				if(line.at(0) == "YSF"){
@@ -804,7 +805,7 @@ void DroidStar::process_fcs_rooms()
 			}
 
 			m_customhosts = m_localhosts.split('\n');
-			for (const auto& i : qAsConst(m_customhosts)){
+            for (const auto& i : std::as_const(m_customhosts)){
 				QStringList line = i.simplified().split(' ');
 
 				if(line.at(0) == "FCS"){
@@ -850,7 +851,7 @@ void DroidStar::process_dmr_hosts()
 			}
 
 			m_customhosts = m_localhosts.split('\n');
-			for (const auto& i : qAsConst(m_customhosts)){
+            for (const auto& i : std::as_const(m_customhosts)){
 				QStringList line = i.simplified().split(' ');
 
 				if(line.at(0) == "DMR"){
@@ -891,7 +892,7 @@ void DroidStar::process_p25_hosts()
 			}
 
 			m_customhosts = m_localhosts.split('\n');
-			for (const auto& i : qAsConst(m_customhosts)){
+            for (const auto& i : std::as_const(m_customhosts)){
 				QStringList line = i.simplified().split(' ');
 
 				if(line.at(0) == "P25"){
@@ -935,7 +936,7 @@ void DroidStar::process_nxdn_hosts()
 			}
 
 			m_customhosts = m_localhosts.split('\n');
-			for (const auto& i : qAsConst(m_customhosts)){
+            for (const auto& i : std::as_const(m_customhosts)){
 				QStringList line = i.simplified().split(' ');
 
 				if(line.at(0) == "NXDN"){
@@ -980,7 +981,7 @@ void DroidStar::process_m17_hosts()
 			}
 
 			m_customhosts = m_localhosts.split('\n');
-			for (const auto& i : qAsConst(m_customhosts)){
+            for (const auto& i : std::as_const(m_customhosts)){
 				QStringList line = i.simplified().split(' ');
 
 				if(line.at(0) == "M17"){