diff --git a/src/blackcore/afv/clients/afvclient.cpp b/src/blackcore/afv/clients/afvclient.cpp
index d541a1a44..86c99ec77 100644
--- a/src/blackcore/afv/clients/afvclient.cpp
+++ b/src/blackcore/afv/clients/afvclient.cpp
@@ -235,6 +235,13 @@ namespace BlackCore
                 this->setNormalizedOutputVolume(mute ? 0 : 50);
             }
 
+            void CAfvClient::startAudio()
+            {
+                const CAudioDeviceInfo inputDevice  = this->getInputDevice();
+                const CAudioDeviceInfo outputDevice = this->getOutputDevice();
+                this->startAudio(inputDevice, outputDevice);
+            }
+
             void CAfvClient::startAudio(const CAudioDeviceInfo &inputDevice, const CAudioDeviceInfo &outputDevice)
             {
                 if (QThread::currentThread() != this->thread())
@@ -244,14 +251,17 @@ namespace BlackCore
                     return;
                 }
 
-                BLACK_VERIFY_X(inputDevice.isValid()  && inputDevice.isInputDevice(), Q_FUNC_INFO, "Wrong input device");
-                BLACK_VERIFY_X(outputDevice.isValid() && outputDevice.isOutputDevice(), Q_FUNC_INFO, "Wrong output device");
+                const CAudioDeviceInfo useInputDevice  = inputDevice.isValid()  ? inputDevice  : CAudioDeviceInfo::getDefaultInputDevice();
+                const CAudioDeviceInfo useOutputDevice = outputDevice.isValid() ? outputDevice : CAudioDeviceInfo::getDefaultOutputDevice();
+
+                BLACK_VERIFY_X(useInputDevice.isValid()  && useInputDevice.isInputDevice(),   Q_FUNC_INFO, "Wrong input device");
+                BLACK_VERIFY_X(useOutputDevice.isValid() && useOutputDevice.isOutputDevice(), Q_FUNC_INFO, "Wrong output device");
 
                 if (m_isStarted)
                 {
-                    if (this->usesSameDevices(inputDevice, outputDevice))
+                    if (this->usesSameDevices(useInputDevice, useOutputDevice))
                     {
-                        CLogMessage(this).info(u"Client already started for '%1'/'%2'") << inputDevice.getName() << outputDevice.getName();
+                        CLogMessage(this).info(u"Client already started for '%1'/'%2'") << useInputDevice.getName() << useOutputDevice.getName();
                         return;
                     }
                     this->stopAudio();
@@ -275,8 +285,8 @@ namespace BlackCore
                     m_outputSampleProvider = new CVolumeSampleProvider(m_soundcardSampleProvider, this);
                     m_outputSampleProvider->setVolume(outputVolume);
 
-                    m_output->start(outputDevice, m_outputSampleProvider);
-                    m_input->start(inputDevice);
+                    m_output->start(useOutputDevice, m_outputSampleProvider);
+                    m_input->start(useInputDevice);
 
                     m_startDateTimeUtc = QDateTime::currentDateTimeUtc();
 
@@ -288,11 +298,11 @@ namespace BlackCore
 
                 this->onSettingsChanged(); // make sure all settings are applied
                 m_isStarted = true;
-                CLogMessage(this).info(u"Started [Input: %1] [Output: %2]") << inputDevice.getName() << outputDevice.getName();
+                CLogMessage(this).info(u"Started [Input: %1] [Output: %2]") << useInputDevice.getName() << useOutputDevice.getName();
 
                 this->onTimerUpdate(); // update values
 
-                emit this->startedAudio(inputDevice, outputDevice);
+                emit this->startedAudio(useInputDevice, useOutputDevice);
             }
 
             void CAfvClient::startAudio(const QString &inputDeviceName, const QString &outputDeviceName)
@@ -328,6 +338,10 @@ namespace BlackCore
                     m_output->stop();
                 }
                 CLogMessage(this).info(u"Client stopped");
+
+                emit this->inputVolumePeakVU(0.0);
+                emit this->outputVolumePeakVU(0.0);
+                emit this->stoppedAudio();
             }
 
             void CAfvClient::setReceiveAudio(bool receive)
diff --git a/src/blackcore/afv/clients/afvclient.h b/src/blackcore/afv/clients/afvclient.h
index 58d1348c6..65f7a7919 100644
--- a/src/blackcore/afv/clients/afvclient.h
+++ b/src/blackcore/afv/clients/afvclient.h
@@ -118,6 +118,7 @@ namespace BlackCore
                 //! @}
 
                 //! Start/stop client @{
+                void startAudio();
                 void startAudio(const BlackMisc::Audio::CAudioDeviceInfo &inputDevice, const BlackMisc::Audio::CAudioDeviceInfo &outputDevice);
                 Q_INVOKABLE void startAudio(const QString &inputDeviceName, const QString &outputDeviceName);
                 void stopAudio();
@@ -271,6 +272,9 @@ namespace BlackCore
                 //! Started audio with devices
                 void startedAudio(const BlackMisc::Audio::CAudioDeviceInfo &inputDevice, const BlackMisc::Audio::CAudioDeviceInfo &outputDevice);
 
+                //! Audio has been stopped
+                void stoppedAudio();
+
             protected:
                 //! \copydoc BlackMisc::CContinuousWorker::initialize
                 virtual void initialize() override;
diff --git a/src/blackcore/context/contextaudio.cpp b/src/blackcore/context/contextaudio.cpp
index 6845b75c5..c5754a257 100644
--- a/src/blackcore/context/contextaudio.cpp
+++ b/src/blackcore/context/contextaudio.cpp
@@ -142,6 +142,7 @@ namespace BlackCore
             // connect(m_voiceClient, &CAfvClient::receivingCallsignsChanged,     this, &CContextAudioBase::receivingCallsignsChanged,     Qt::QueuedConnection);
             // connect(m_voiceClient, &CAfvClient::updatedFromOwnAircraftCockpit, this, &CContextAudioBase::updatedFromOwnAircraftCockpit, Qt::QueuedConnection);
             connect(m_voiceClient, &CAfvClient::startedAudio,                  this, &CContextAudioBase::startedAudio, Qt::QueuedConnection);
+            connect(m_voiceClient, &CAfvClient::stoppedAudio,                  this, &CContextAudioBase::stoppedAudio, Qt::QueuedConnection);
             connect(m_voiceClient, &CAfvClient::ptt,                           this, &CContextAudioBase::ptt,          Qt::QueuedConnection);
 
             const CSettings as = m_audioSettings.getThreadLocal();
@@ -204,6 +205,11 @@ namespace BlackCore
             return m_voiceClient && m_voiceClient->isConnected();
         }
 
+        bool CContextAudioBase::isAudioStarted() const
+        {
+            return m_voiceClient && m_voiceClient->isStarted();
+        }
+
         QString CContextAudioBase::audioRunsWhereInfo() const
         {
             static const QString s = QStringLiteral("Audio on '%1', '%2'.").arg(audioRunsWhere().getMachineName(), audioRunsWhere().getProcessName());
diff --git a/src/blackcore/context/contextaudio.h b/src/blackcore/context/contextaudio.h
index 05a1892a7..db07bbf30 100644
--- a/src/blackcore/context/contextaudio.h
+++ b/src/blackcore/context/contextaudio.h
@@ -177,9 +177,12 @@ namespace BlackCore
             //! Is COM unit transmitting?
             bool isTransmittingComUnit(BlackMisc::Aviation::CComSystem::ComUnit comUnit) const;
 
-            //! Is audio started
+            //! Is audio connected?
             bool isAudioConnected() const;
 
+            //! Is audio started?
+            bool isAudioStarted() const;
+
             //! \todo WORKAROUND to hide the "local signals"
             Afv::Clients::CAfvClient *afvClient() const { return m_voiceClient; }
 
@@ -212,9 +215,12 @@ namespace BlackCore
             //! Changed audio devices (e.g. device enabled/disable)
             void changedAudioDevices(const BlackMisc::Audio::CAudioDeviceInfoList &devices);
 
-            //! Audio started with
+            //! Audio started with devices
             void startedAudio(const BlackMisc::Audio::CAudioDeviceInfo &input, const BlackMisc::Audio::CAudioDeviceInfo &output);
 
+            //! Audio stopped
+            void stoppedAudio();
+
             //! PTT in voice client received
             void ptt(bool active, BlackMisc::Audio::PTTCOM pttcom, const BlackMisc::CIdentifier &identifier);