diff --git a/sdrbase/dsp/dspengine.h b/sdrbase/dsp/dspengine.h
index acde19900..e7966f12c 100644
--- a/sdrbase/dsp/dspengine.h
+++ b/sdrbase/dsp/dspengine.h
@@ -79,6 +79,13 @@ public:
 
 	void setDVSerialSupport(bool support);
 
+	void getDVSerialNames(std::vector<std::string>& deviceNames)
+	{
+#ifdef DSD_USE_SERIALDV
+	    m_dvSerialEngine.getDevicesNames(deviceNames);
+#endif
+	}
+
 	void pushMbeFrame(const unsigned char *mbeFrame, int mbeRateIndex, int mbeVolumeIndex, AudioFifo *audioFifo)
 	{
 #ifdef DSD_USE_SERIALDV
diff --git a/sdrbase/dsp/dvserialengine.cpp b/sdrbase/dsp/dvserialengine.cpp
index 067d3cd39..1cd895771 100644
--- a/sdrbase/dsp/dvserialengine.cpp
+++ b/sdrbase/dsp/dvserialengine.cpp
@@ -233,6 +233,17 @@ void DVSerialEngine::release()
     m_controllers.clear();
 }
 
+void DVSerialEngine::getDevicesNames(std::vector<std::string>& deviceNames)
+{
+    std::vector<DVSerialController>::iterator it = m_controllers.begin();
+
+    while (it != m_controllers.end())
+    {
+        deviceNames.push_back(it->device);
+        ++it;
+    }
+}
+
 void DVSerialEngine::pushMbeFrame(const unsigned char *mbeFrame, int mbeRateIndex, int mbeVolumeIndex, AudioFifo *audioFifo)
 {
     std::vector<DVSerialController>::iterator it = m_controllers.begin();
diff --git a/sdrbase/dsp/dvserialengine.h b/sdrbase/dsp/dvserialengine.h
index bee7a2f5c..97e68ec97 100644
--- a/sdrbase/dsp/dvserialengine.h
+++ b/sdrbase/dsp/dvserialengine.h
@@ -38,6 +38,8 @@ public:
     void release();
 
     int getNbDevices() const { return m_controllers.size(); }
+    void getDevicesNames(std::vector<std::string>& devicesNames);
+
     void pushMbeFrame(const unsigned char *mbeFrame, int mbeRateIndex, int mbeVolumeIndex, AudioFifo *audioFifo);
 
 private:
diff --git a/sdrbase/dsp/dvserialworker.cpp b/sdrbase/dsp/dvserialworker.cpp
index 16ed7b439..bb44680fc 100644
--- a/sdrbase/dsp/dvserialworker.cpp
+++ b/sdrbase/dsp/dvserialworker.cpp
@@ -76,7 +76,7 @@ void DVSerialWorker::handleInputMessages()
         if (MsgMbeDecode::match(*message))
         {
             MsgMbeDecode *decodeMsg = (MsgMbeDecode *) message;
-            int dBVolume = (decodeMsg->getVolumeIndex() - 50) / 4;
+            int dBVolume = (decodeMsg->getVolumeIndex() - 50) / 2;
 
             if (m_dvController.decode(m_dvAudioSamples, decodeMsg->getMbeFrame(), decodeMsg->getMbeRate(), dBVolume))
             {
diff --git a/sdrbase/mainwindow.cpp b/sdrbase/mainwindow.cpp
index 1be2efb9e..d825df7bf 100644
--- a/sdrbase/mainwindow.cpp
+++ b/sdrbase/mainwindow.cpp
@@ -23,6 +23,7 @@
 #include <QFileInfo>
 #include <QFileDialog>
 #include <QTextStream>
+#include <QMessageBox>
 
 #include "mainwindow.h"
 #include "ui_mainwindow.h"
@@ -690,6 +691,34 @@ void MainWindow::on_action_Audio_triggered()
 void MainWindow::on_action_DV_Serial_triggered(bool checked)
 {
     m_dspEngine->setDVSerialSupport(checked);
+
+    if (checked)
+    {
+        std::vector<std::string> deviceNames;
+        m_dspEngine->getDVSerialNames(deviceNames);
+
+        if (deviceNames.size() == 0)
+        {
+            QMessageBox::information(this, tr("Message"), tr("No DV serial devices found"));
+        }
+        else
+        {
+            std::vector<std::string>::iterator it = deviceNames.begin();
+            std::string deviceNamesStr = "DV Serial devices found: ";
+
+            while (it != deviceNames.end())
+            {
+                if (it != deviceNames.begin()) {
+                    deviceNamesStr += ",";
+                }
+
+                deviceNamesStr += *it;
+                ++it;
+            }
+
+            QMessageBox::information(this, tr("Message"), tr(deviceNamesStr.c_str()));
+        }
+    }
 }
 
 void MainWindow::on_sampleSource_currentIndexChanged(int index)