diff --git a/samples/blackgui/mainwindow.h b/samples/blackgui/mainwindow.h
index 7048f5863..b32619b04 100644
--- a/samples/blackgui/mainwindow.h
+++ b/samples/blackgui/mainwindow.h
@@ -276,6 +276,11 @@ private:
      */
     void stopUpdateTimers(bool disconnect = false);
 
+    /*!
+     * \brief Currently selected SELCAL code
+     */
+    QString getSelcalCode() const;
+
 private slots:
 
     //
@@ -470,6 +475,10 @@ private slots:
      */
     void audioIconContextMenu(const QPoint &position);
 
+    /*!
+     * \brief Test SELCAL (code valid? play tone)
+     */
+    void testSelcal();
 };
 
 #pragma pop_macro("interface")
diff --git a/samples/blackgui/mainwindow_cockpit.cpp b/samples/blackgui/mainwindow_cockpit.cpp
index b3d6ebca5..06b951efb 100644
--- a/samples/blackgui/mainwindow_cockpit.cpp
+++ b/samples/blackgui/mainwindow_cockpit.cpp
@@ -1,5 +1,6 @@
 #include "mainwindow.h"
 #include "ui_mainwindow.h"
+#include "blacksound/soundgenerator.h"
 #include "blackgui/atcstationlistmodel.h"
 #include "blackcore/dbus_server.h"
 #include "blackcore/context_network.h"
@@ -15,6 +16,7 @@ using namespace BlackMisc::Geo;
 using namespace BlackMisc::Settings;
 using namespace BlackMisc::Math;
 using namespace BlackMisc::Voice;
+using namespace BlackSound;
 
 /*
  * Cockpit values
@@ -304,3 +306,27 @@ void MainWindow::setAudioVoiceRooms()
     // set the real voice rooms for audio output
     this->m_contextVoice->setComVoiceRooms(room1, room2);
 }
+
+/*
+ * Test SELCAL code
+ */
+void MainWindow::testSelcal()
+{
+    QString selcal = this->getSelcalCode();
+    if (!CSelcal::isValidCode(selcal))
+    {
+        this->displayStatusMessage(
+            CStatusMessage(CStatusMessage::TypeValidation, CStatusMessage::SeverityWarning, "invalid SELCAL codde"));
+        return;
+    }
+    CSoundGenerator::playSelcal(90, CSelcal(selcal));
+}
+
+/*
+ * SELCAL value selected
+ */
+QString MainWindow::getSelcalCode() const
+{
+    QString selcal = this->ui->cb_CockpitSelcal1->currentText().append(this->ui->cb_CockpitSelcal2->currentText());
+    return selcal;
+}
diff --git a/samples/blackgui/mainwindow_init.cpp b/samples/blackgui/mainwindow_init.cpp
index b26c6498c..04836a2b9 100644
--- a/samples/blackgui/mainwindow_init.cpp
+++ b/samples/blackgui/mainwindow_init.cpp
@@ -1,9 +1,10 @@
 #include "mainwindow.h"
 #include "ui_mainwindow.h"
-#include "blackgui/atcstationlistmodel.h"
 #include "blackcore/dbus_server.h"
 #include "blackcore/context_network.h"
 #include "blackcore/coreruntime.h"
+#include "blackgui/atcstationlistmodel.h"
+#include "blackmisc/avselcal.h"
 #include <QSortFilterProxyModel>
 #include <QSizeGrip>
 #include <QHBoxLayout>
@@ -119,6 +120,10 @@ void MainWindow::init(GuiModes::CoreMode coreMode)
     this->ui->tv_CockpitVoiceRoom2->resizeRowsToContents();
     this->ui->tv_CockpitVoiceRoom2->horizontalHeader()->setStretchLastSection(true);
 
+    // SELCAL pairs in cockpit
+    this->ui->cb_CockpitSelcal1->addItems(BlackMisc::Aviation::CSelcal::codePairs());
+    this->ui->cb_CockpitSelcal2->addItems(BlackMisc::Aviation::CSelcal::codePairs());
+
     // timer
     if (this->m_timerUpdateAircraftsInRange == nullptr) this->m_timerUpdateAircraftsInRange = new QTimer(this);
     if (this->m_timerUpdateAtcStationsOnline == nullptr) this->m_timerUpdateAtcStationsOnline = new QTimer(this);
@@ -265,6 +270,7 @@ void MainWindow::initGuiSignals()
     this->connect(this->ui->pb_CockpitToggleCom1, &QPushButton::clicked, this, &MainWindow::cockpitValuesChanged);
     this->connect(this->ui->pb_CockpitToggleCom2, &QPushButton::clicked, this, &MainWindow::cockpitValuesChanged);
     this->connect(this->ui->pb_CockpitIdent, &QPushButton::clicked, this, &MainWindow::cockpitValuesChanged);
+    this->connect(this->ui->pb_CockpitSelcalTest, &QPushButton::clicked, this, &MainWindow::testSelcal);
 
     // voice
     connected = this->connect(this->ui->cb_VoiceInputDevice, SIGNAL(currentIndexChanged(int)), this, SLOT(audioDeviceSelected(int)));