diff --git a/Configuration.cpp b/Configuration.cpp
index 007b01c..7264577 100644
--- a/Configuration.cpp
+++ b/Configuration.cpp
@@ -1416,7 +1416,9 @@ Configuration::impl::impl (Configuration * self, QDir const& temp_directory,
     table->setCellWidget(i, 3, w3);
     i++;
   }
-  table->resizeColumnsToContents();
+  table->resizeColumnToContents(0);
+  table->resizeColumnToContents(1);
+  table->resizeColumnToContents(2);
 
 
   //
diff --git a/Configuration.ui b/Configuration.ui
index cf8e20f..df2204f 100644
--- a/Configuration.ui
+++ b/Configuration.ui
@@ -23,7 +23,7 @@
       <string>Select tab to change configuration parameters.</string>
      </property>
      <property name="currentIndex">
-      <number>6</number>
+      <number>0</number>
      </property>
      <widget class="QWidget" name="general_tab">
       <attribute name="title">
@@ -278,7 +278,7 @@
                <rect>
                 <x>0</x>
                 <y>0</y>
-                <width>615</width>
+                <width>724</width>
                 <height>508</height>
                </rect>
               </property>
@@ -793,8 +793,8 @@ text message.</string>
                <rect>
                 <x>0</x>
                 <y>0</y>
-                <width>616</width>
-                <height>331</height>
+                <width>738</width>
+                <height>453</height>
                </rect>
               </property>
               <layout class="QVBoxLayout" name="verticalLayout_16">
@@ -2082,20 +2082,22 @@ both here.</string>
                  </sizepolicy>
                 </property>
                 <property name="toolTip">
-                 <string>Select the audio CODEC to use for transmitting.
-If this is your default device for system sounds then
+                 <string>Select the audio CODEC to use for notifications.
+If this is your default device for system sounds and transmission then
 ensure that all system sounds are disabled otherwise
-you will broadcast any systems sounds generated during
+you will broadcast any systems sounds and notifications generated during
 transmitting periods.</string>
                 </property>
                </widget>
               </item>
               <item row="0" column="2">
                <widget class="QComboBox" name="notification_sound_output_channel_combo_box">
+                <property name="visible">
+                 <bool>false</bool>
+                </property>
                 <property name="toolTip">
-                 <string>Select the audio channel used for transmission.
-Unless you have multiple radios connected on different
-channels; then you will usually want to select mono or
+                 <string>Select the audio channel used for notifications.
+You will usually want to select mono or
 both here.</string>
                 </property>
                 <item>
diff --git a/NotificationAudio.cpp b/NotificationAudio.cpp
index 1e1a5d4..b6df985 100644
--- a/NotificationAudio.cpp
+++ b/NotificationAudio.cpp
@@ -4,8 +4,8 @@
 NotificationAudio::NotificationAudio(QObject *parent) :
     QIODevice(parent),
     m_state(State::Stopped),
-    m_input(&m_data),
-    m_output(&m_data),
+    m_input(&m_data, this),
+    m_output(&m_data, this),
     m_decoder(nullptr),
     m_audio(nullptr)
 {
@@ -15,6 +15,16 @@ NotificationAudio::NotificationAudio(QObject *parent) :
     m_isDecodingFinished = false;
 }
 
+NotificationAudio::~NotificationAudio(){
+    stop();
+
+    delete m_decoder;
+    m_decoder = nullptr;
+
+    delete m_audio;
+    m_audio = nullptr;
+}
+
 // initialize an audio device
 void NotificationAudio::init(const QAudioDeviceInfo &device, const QAudioFormat& format) {
     m_device = device;
@@ -28,7 +38,7 @@ void NotificationAudio::init(const QAudioDeviceInfo &device, const QAudioFormat&
     m_decoder->setAudioFormat(m_format);
 
     if(!m_audio){
-        m_audio = new QAudioOutput(m_device, m_format);
+        m_audio = new QAudioOutput(m_device, m_format, this);
     }
 
     if (!m_output.open(QIODevice::ReadOnly) || !m_input.open(QIODevice::WriteOnly)){
@@ -42,6 +52,10 @@ void NotificationAudio::init(const QAudioDeviceInfo &device, const QAudioFormat&
 
 // play an audio file
 void NotificationAudio::play(const QString &filePath) {
+    if(m_state == NotificationAudio::Playing){
+        return;
+    }
+
     QFile *file = new QFile(this);
     file->setFileName(filePath);
     if (!file->open(QIODevice::ReadOnly)){
@@ -78,8 +92,9 @@ void NotificationAudio::stop() {
 // Reset the internal buffers and ensure the decoder and audio device is stopped
 void NotificationAudio::resetBuffers() {
     if(m_audio){
-        if(m_audio->state() != QAudio::StoppedState){
-            m_audio->stop();
+
+        if(m_audio->state() != QAudio::SuspendedState){
+            m_audio->suspend();
         }
     }
 
@@ -105,21 +120,18 @@ void NotificationAudio::resetBuffers() {
 qint64 NotificationAudio::readData(char* data, qint64 maxlen) {
     memset(data, 0, maxlen);
 
-    if (m_state == State::Playing)
-    {
+    if (m_state == State::Playing){
         m_output.read(data, maxlen);
 
         // There is we send readed audio data via signal, for ability get audio signal for the who listen this signal.
         // Other word this emulate QAudioProbe behaviour for retrieve audio data which of sent to output device (speaker).
-        if (maxlen > 0)
-        {
-            QByteArray buff(data, maxlen);
-            emit newData(buff);
-        }
+        // if (maxlen > 0){
+        //     QByteArray buff(data, maxlen);
+        //     emit newData(buff);
+        // }
 
         // Is finish of file
-        if (atEnd())
-        {
+        if (atEnd()){
             stop();
         }
     }
@@ -137,9 +149,10 @@ qint64 NotificationAudio::writeData(const char* data, qint64 len) {
 
 // io device, at end of device
 bool NotificationAudio::atEnd() const {
-    return m_output.size()
+    bool value = m_output.size()
         && m_output.atEnd()
         && m_isDecodingFinished;
+    return value;
 }
 
 // handle buffered data ready
diff --git a/NotificationAudio.h b/NotificationAudio.h
index cc9a64c..8458578 100644
--- a/NotificationAudio.h
+++ b/NotificationAudio.h
@@ -18,6 +18,7 @@ class NotificationAudio : public QIODevice
 
 public:
     NotificationAudio(QObject * parent=nullptr);
+    ~NotificationAudio();
 
     bool isInitialized() const { return m_init; }
 
diff --git a/mainwindow.cpp b/mainwindow.cpp
index 783f82f..dcc5d22 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -439,6 +439,7 @@ MainWindow::MainWindow(QDir const& temp_directory, bool multiple,
   m_framesAudioInputBuffered (RX_SAMPLE_RATE / 10),
   m_downSampleFactor (downSampleFactor),
   m_audioThreadPriority (QThread::HighPriority),
+  m_notificationAudioThreadPriority (QThread::LowPriority),
   m_bandEdited {false},
   m_splitMode {false},
   m_monitoring {false},
@@ -503,12 +504,13 @@ MainWindow::MainWindow(QDir const& temp_directory, bool multiple,
   m_modulator->moveToThread (&m_audioThread);
   m_soundInput->moveToThread (&m_audioThread);
   m_detector->moveToThread (&m_audioThread);
-  m_notification->moveToThread(&m_audioThread);
+
+  // notification audio operates in its own thread at a lower priority
+  m_notification->moveToThread(&m_notificationAudioThread);
 
   // hook up sound output stream slots & signals and disposal
   connect (this, &MainWindow::initializeAudioOutputStream, m_soundOutput, &SoundOutput::setFormat);
   connect (m_soundOutput, &SoundOutput::error, this, &MainWindow::showSoundOutError);
-  // connect (m_soundOutput, &SoundOutput::status, this, &MainWindow::showStatusMessage);
   connect (this, &MainWindow::outAttenuationChanged, m_soundOutput, &SoundOutput::setAttenuation);
   connect (&m_audioThread, &QThread::finished, m_soundOutput, &QObject::deleteLater);
 
@@ -517,7 +519,7 @@ MainWindow::MainWindow(QDir const& temp_directory, bool multiple,
     emit playNotification("/tmp/test.wav");
   });
   connect(this, &MainWindow::playNotification, m_notification, &NotificationAudio::play);
-  connect (&m_audioThread, &QThread::finished, m_notification, &QObject::deleteLater);
+  connect (&m_notificationAudioThread, &QThread::finished, m_notification, &QObject::deleteLater);
 
   // hook up Modulator slots and disposal
   connect (this, &MainWindow::transmitFrequency, m_modulator, &Modulator::setFrequency);
@@ -841,6 +843,10 @@ MainWindow::MainWindow(QDir const& temp_directory, bool multiple,
 
   connect(m_wideGraph.data(), &WideGraph::qsy, this, &MainWindow::qsy);
 
+  connect(ui->tableWidgetCalls, &QTableWidget::clicked, this, [this](){
+     emit playNotification("/tmp/test.wav");
+  });
+
   decodeBusy(false);
   QString t1[28]={"1 uW","2 uW","5 uW","10 uW","20 uW","50 uW","100 uW","200 uW","500 uW",
                   "1 mW","2 mW","5 mW","10 mW","20 mW","50 mW","100 mW","200 mW","500 mW",
@@ -870,7 +876,9 @@ MainWindow::MainWindow(QDir const& temp_directory, bool multiple,
 
   displayDialFrequency();
   readSettings();            //Restore user's setup params
+
   m_audioThread.start (m_audioThreadPriority);
+  m_notificationAudioThread.start(m_notificationAudioThreadPriority);
 
 #ifdef WIN32
   if (!m_multiple)
@@ -943,6 +951,7 @@ MainWindow::MainWindow(QDir const& temp_directory, bool multiple,
 //  Q_EMIT startAudioInputStream (m_config.audio_input_device (), m_framesAudioInputBuffered, &m_detector, m_downSampleFactor, m_config.audio_input_channel ());
   Q_EMIT startAudioInputStream (m_config.audio_input_device (), m_framesAudioInputBuffered, m_detector, m_downSampleFactor, m_config.audio_input_channel ());
   Q_EMIT initializeAudioOutputStream (m_config.audio_output_device (), AudioDevice::Mono == m_config.audio_output_channel () ? 1 : 2, m_msAudioOutputBuffered);
+  Q_EMIT initializeNotificationAudioOutputStream(m_config.notification_audio_output_device(), m_config.notification_audio_output_device().preferredFormat());
   Q_EMIT transmitFrequency (ui->TxFreqSpinBox->value () - m_XIT);
 
   enable_DXCC_entity (m_config.DXCC ());  // sets text window proportions and (re)inits the logbook
@@ -2141,9 +2150,15 @@ MainWindow::~MainWindow()
   m_astroWidget.reset ();
   QString fname {QDir::toNativeSeparators(m_config.writeable_data_dir ().absoluteFilePath ("wsjtx_wisdom.dat"))};
   QByteArray cfname=fname.toLocal8Bit();
+
   fftwf_export_wisdom_to_filename(cfname);
+
   m_audioThread.quit ();
   m_audioThread.wait ();
+
+  m_notificationAudioThread.quit();
+  m_notificationAudioThread.wait();
+
   remove_child_from_event_filter (this);
 }
 
diff --git a/mainwindow.h b/mainwindow.h
index 09fb9e1..28576e9 100644
--- a/mainwindow.h
+++ b/mainwindow.h
@@ -507,6 +507,7 @@ private:
   SoundOutput * m_soundOutput;
   NotificationAudio * m_notification;
   QThread m_audioThread;
+  QThread m_notificationAudioThread;
 
   qint64  m_msErase;
   qint64  m_secBandChanged;
@@ -906,6 +907,7 @@ private:
   unsigned m_framesAudioInputBuffered;
   unsigned m_downSampleFactor;
   QThread::Priority m_audioThreadPriority;
+  QThread::Priority m_notificationAudioThreadPriority;
   bool m_bandEdited;
   bool m_splitMode;
   bool m_monitoring;