diff --git a/plugins/channelmimo/interferometer/interferometer.cpp b/plugins/channelmimo/interferometer/interferometer.cpp
index aa56461ba..9d90933e6 100644
--- a/plugins/channelmimo/interferometer/interferometer.cpp
+++ b/plugins/channelmimo/interferometer/interferometer.cpp
@@ -28,6 +28,9 @@
 #include "device/deviceapi.h"
 #include "dsp/hbfilterchainconverter.h"
 #include "dsp/dspcommands.h"
+#include "dsp/dspdevicesourceengine.h"
+#include "dsp/devicesamplesource.h"
+#include "device/deviceset.h"
 #include "maincore.h"
 
 #include "interferometerbaseband.h"
@@ -35,6 +38,7 @@
 
 MESSAGE_CLASS_DEFINITION(Interferometer::MsgConfigureInterferometer, Message)
 MESSAGE_CLASS_DEFINITION(Interferometer::MsgBasebandNotification, Message)
+MESSAGE_CLASS_DEFINITION(Interferometer::MsgReportDevices, Message)
 
 const char* const Interferometer::m_channelIdURI = "sdrangel.channel.interferometer";
 const char* const Interferometer::m_channelId = "Interferometer";
@@ -63,6 +67,20 @@ Interferometer::Interferometer(DeviceAPI *deviceAPI) :
         this,
         &Interferometer::networkManagerFinished
     );
+    // Update device list when devices are added or removed
+    QObject::connect(
+        MainCore::instance(),
+        &MainCore::deviceSetAdded,
+        this,
+        &Interferometer::updateDeviceSetList
+    );
+    QObject::connect(
+        MainCore::instance(),
+        &MainCore::deviceSetRemoved,
+        this,
+        &Interferometer::updateDeviceSetList
+    );
+    updateDeviceSetList();
     startSinks();
 }
 
@@ -155,62 +173,30 @@ void Interferometer::pull(SampleVector::iterator& begin, unsigned int nbSamples,
     (void) sourceIndex;
 }
 
-void Interferometer::applySettings(const InterferometerSettings& settings, bool force)
+void Interferometer::applySettings(const InterferometerSettings& settings, const QList<QString>& settingsKeys, bool force)
 {
-    qDebug() << "Interferometer::applySettings: "
-        << "m_correlationType: " << settings.m_correlationType
-        << "m_filterChainHash: " << settings.m_filterChainHash
-        << "m_log2Decim: " << settings.m_log2Decim
-        << "m_phase: " << settings.m_phase
-        << "m_gain: " << settings.m_gain / 10.0
-        << "m_useReverseAPI: " << settings.m_useReverseAPI
-        << "m_reverseAPIAddress: " << settings.m_reverseAPIAddress
-        << "m_reverseAPIPort: " << settings.m_reverseAPIPort
-        << "m_reverseAPIDeviceIndex: " << settings.m_reverseAPIDeviceIndex
-        << "m_reverseAPIChannelIndex: " << settings.m_reverseAPIChannelIndex
-        << "m_title: " << settings.m_title;
+    qDebug() << "LocalSink::applySettings:" << settings.getDebugString(settingsKeys, force) << "force: " << force;
 
-    QList<QString> reverseAPIKeys;
-
-    if ((m_settings.m_correlationType != settings.m_correlationType) || force) {
-        reverseAPIKeys.append("correlationType");
-    }
-    if ((m_settings.m_filterChainHash != settings.m_filterChainHash) || force) {
-        reverseAPIKeys.append("filterChainHash");
-    }
-    if ((m_settings.m_log2Decim != settings.m_log2Decim) || force) {
-        reverseAPIKeys.append("log2Decim");
-    }
-    if ((m_settings.m_phase != settings.m_phase) || force) {
-        reverseAPIKeys.append("phase");
-    }
-    if ((m_settings.m_phase != settings.m_gain) || force) {
-        reverseAPIKeys.append("gain");
-    }
-    if ((m_settings.m_title != settings.m_title) || force) {
-        reverseAPIKeys.append("title");
-    }
-
-    if (m_running && ((m_settings.m_log2Decim != settings.m_log2Decim)
-        || (m_settings.m_filterChainHash != settings.m_filterChainHash) || force))
+    if (m_running && (settingsKeys.contains("log2Decim")
+        || settingsKeys.contains("filterChainHash") || force))
     {
         InterferometerBaseband::MsgConfigureChannelizer *msg = InterferometerBaseband::MsgConfigureChannelizer::create(
             settings.m_log2Decim, settings.m_filterChainHash);
         m_basebandSink->getInputMessageQueue()->push(msg);
     }
 
-    if (m_running && ((m_settings.m_correlationType != settings.m_correlationType) || force))
+    if (m_running && ((settingsKeys.contains("correlationType")) || force))
     {
         InterferometerBaseband::MsgConfigureCorrelation *msg = InterferometerBaseband::MsgConfigureCorrelation::create(
             settings.m_correlationType);
         m_basebandSink->getInputMessageQueue()->push(msg);
     }
 
-    if (m_running && ((m_settings.m_phase != settings.m_phase) || force)) {
+    if (m_running && ((settingsKeys.contains("phase")) || force)) {
         m_basebandSink->setPhase(settings.m_phase);
     }
 
-    if (m_running && ((m_settings.m_gain != settings.m_gain) || force)) {
+    if (m_running && ((settingsKeys.contains("gain")) || force)) {
         m_basebandSink->setGain(settings.m_gain);
     }
 
@@ -218,10 +204,24 @@ void Interferometer::applySettings(const InterferometerSettings& settings, bool
     MainCore::instance()->getMessagePipes().getMessagePipes(this, "settings", pipes);
 
     if (pipes.size() > 0) {
-        sendChannelSettings(pipes, reverseAPIKeys, settings, force);
+        sendChannelSettings(pipes, settingsKeys, settings, force);
     }
 
-    m_settings = settings;
+    if (settings.m_useReverseAPI)
+    {
+        bool fullUpdate = (settingsKeys.contains("useReverseAPI") && settings.m_useReverseAPI) ||
+                settingsKeys.contains("reverseAPIAddress") ||
+                settingsKeys.contains("reverseAPIPort") ||
+                settingsKeys.contains("reverseAPIFeatureSetIndex") ||
+                settingsKeys.contains("reverseAPIFeatureIndex");
+        webapiReverseSendSettings(settingsKeys, settings, fullUpdate || force);
+    }
+
+    if (force) {
+        m_settings = settings;
+    } else {
+        m_settings.applySettings(settingsKeys, settings);
+    }
 }
 
 void Interferometer::handleInputMessages()
@@ -243,7 +243,7 @@ bool Interferometer::handleMessage(const Message& cmd)
     {
         MsgConfigureInterferometer& cfg = (MsgConfigureInterferometer&) cmd;
         qDebug() << "Interferometer::handleMessage: MsgConfigureInterferometer";
-        applySettings(cfg.getSettings(), cfg.getForce());
+        applySettings(cfg.getSettings(), cfg.getSettingsKeys(), cfg.getForce());
         return true;
     }
     else if (DSPMIMOSignalNotification::match(cmd))
@@ -298,14 +298,14 @@ bool Interferometer::deserialize(const QByteArray& data)
     (void) data;
     if (m_settings.deserialize(data))
     {
-        MsgConfigureInterferometer *msg = MsgConfigureInterferometer::create(m_settings, true);
+        MsgConfigureInterferometer *msg = MsgConfigureInterferometer::create(m_settings, QList<QString>(), true);
         m_inputMessageQueue.push(msg);
         return true;
     }
     else
     {
         m_settings.resetToDefaults();
-        MsgConfigureInterferometer *msg = MsgConfigureInterferometer::create(m_settings, true);
+        MsgConfigureInterferometer *msg = MsgConfigureInterferometer::create(m_settings, QList<QString>(), true);
         m_inputMessageQueue.push(msg);
         return false;
     }
@@ -338,6 +338,70 @@ void Interferometer::applyChannelSettings(uint32_t log2Decim, uint32_t filterCha
     m_basebandSink->getInputMessageQueue()->push(msg);
 }
 
+void Interferometer::updateDeviceSetList()
+{
+    MainCore *mainCore = MainCore::instance();
+    std::vector<DeviceSet*>& deviceSets = mainCore->getDeviceSets();
+    std::vector<DeviceSet*>::const_iterator it = deviceSets.begin();
+
+    m_localInputDeviceIndexes.clear();
+    unsigned int deviceIndex = 0;
+
+    for (; it != deviceSets.end(); ++it, deviceIndex++)
+    {
+        DSPDeviceSourceEngine *deviceSourceEngine = (*it)->m_deviceSourceEngine;
+
+        if (deviceSourceEngine)
+        {
+            DeviceSampleSource *deviceSource = deviceSourceEngine->getSource();
+
+            if (deviceSource->getDeviceDescription() == "LocalInput") {
+                m_localInputDeviceIndexes.append(deviceIndex);
+            }
+        }
+    }
+
+    if (m_guiMessageQueue)
+    {
+        MsgReportDevices *msg = MsgReportDevices::create();
+        msg->getDeviceSetIndexes() = m_localInputDeviceIndexes;
+        m_guiMessageQueue->push(msg);
+    }
+
+    InterferometerSettings settings = m_settings;
+    int newIndexInList;
+
+    if (it != deviceSets.begin())
+    {
+        if (m_settings.m_localDeviceIndex < 0) {
+            newIndexInList = 0;
+        } else if (m_settings.m_localDeviceIndex >= m_localInputDeviceIndexes.size()) {
+            newIndexInList = m_localInputDeviceIndexes.size() - 1;
+        } else {
+            newIndexInList = m_settings.m_localDeviceIndex;
+        }
+    }
+    else
+    {
+        newIndexInList = -1;
+    }
+
+    if (newIndexInList < 0) {
+        settings.m_localDeviceIndex = -1; // means no device
+    } else {
+        settings.m_localDeviceIndex = m_localInputDeviceIndexes[newIndexInList];
+    }
+
+    qDebug("LocalSink::updateDeviceSetLists: new device index: %d device: %d", newIndexInList, settings.m_localDeviceIndex);
+    applySettings(settings, QList<QString>{"localDeviceIndex"});
+
+    if (m_guiMessageQueue)
+    {
+        MsgConfigureInterferometer *msg = MsgConfigureInterferometer::create(m_settings, QList<QString>{"localDeviceIndex"}, false);
+        m_guiMessageQueue->push(msg);
+    }
+}
+
 int Interferometer::webapiSettingsGet(
         SWGSDRangel::SWGChannelSettings& response,
         QString& errorMessage)
@@ -368,12 +432,12 @@ int Interferometer::webapiSettingsPutPatch(
     InterferometerSettings settings = m_settings;
     webapiUpdateChannelSettings(settings, channelSettingsKeys, response);
 
-    MsgConfigureInterferometer *msg = MsgConfigureInterferometer::create(settings, force);
+    MsgConfigureInterferometer *msg = MsgConfigureInterferometer::create(settings, channelSettingsKeys, force);
     m_inputMessageQueue.push(msg);
 
     if (getMessageQueueToGUI()) // forward to GUI if any
     {
-        MsgConfigureInterferometer *msgToGUI = MsgConfigureInterferometer::create(settings, force);
+        MsgConfigureInterferometer *msgToGUI = MsgConfigureInterferometer::create(settings, channelSettingsKeys, force);
         getMessageQueueToGUI()->push(msgToGUI);
     }
 
@@ -521,7 +585,7 @@ void Interferometer::webapiFormatChannelSettings(SWGSDRangel::SWGChannelSettings
     }
 }
 
-void Interferometer::webapiReverseSendSettings(QList<QString>& channelSettingsKeys, const InterferometerSettings& settings, bool force)
+void Interferometer::webapiReverseSendSettings(const QList<QString>& channelSettingsKeys, const InterferometerSettings& settings, bool force)
 {
     SWGSDRangel::SWGChannelSettings *swgChannelSettings = new SWGSDRangel::SWGChannelSettings();
     webapiFormatChannelSettings(channelSettingsKeys, swgChannelSettings, settings, force);
@@ -548,7 +612,7 @@ void Interferometer::webapiReverseSendSettings(QList<QString>& channelSettingsKe
 
 void Interferometer::sendChannelSettings(
     const QList<ObjectPipe*>& pipes,
-    QList<QString>& channelSettingsKeys,
+    const QList<QString>& channelSettingsKeys,
     const InterferometerSettings& settings,
     bool force)
 {
@@ -572,7 +636,7 @@ void Interferometer::sendChannelSettings(
 }
 
 void Interferometer::webapiFormatChannelSettings(
-        QList<QString>& channelSettingsKeys,
+        const QList<QString>& channelSettingsKeys,
         SWGSDRangel::SWGChannelSettings *swgChannelSettings,
         const InterferometerSettings& settings,
         bool force
@@ -606,18 +670,18 @@ void Interferometer::webapiFormatChannelSettings(
         swgInterferometerSettings->setFilterChainHash(settings.m_filterChainHash);
     }
 
-    if (settings.m_spectrumGUI)
+    if (settings.m_spectrumGUI && (channelSettingsKeys.contains("spectrumConfig") || force))
     {
-        if (channelSettingsKeys.contains("spectrumConfig") || force) {
-            settings.m_spectrumGUI->formatTo(swgInterferometerSettings->getSpectrumConfig());
-        }
+        SWGSDRangel::SWGGLSpectrum *swgGLSpectrum = new SWGSDRangel::SWGGLSpectrum();
+        settings.m_spectrumGUI->formatTo(swgGLSpectrum);
+        swgInterferometerSettings->setSpectrumConfig(swgGLSpectrum);
     }
 
-    if (settings.m_scopeGUI)
+    if (settings.m_scopeGUI && (channelSettingsKeys.contains("scopeConfig") || force))
     {
-        if (channelSettingsKeys.contains("scopeConfig") || force) {
-            settings.m_scopeGUI->formatTo(swgInterferometerSettings->getScopeConfig());
-        }
+        SWGSDRangel::SWGGLScope *swgGLScope = new SWGSDRangel::SWGGLScope();
+        settings.m_scopeGUI->formatTo(swgGLScope);
+        swgInterferometerSettings->setScopeConfig(swgGLScope);
     }
 
     if (settings.m_channelMarker && (channelSettingsKeys.contains("channelMarker") || force))
diff --git a/plugins/channelmimo/interferometer/interferometer.h b/plugins/channelmimo/interferometer/interferometer.h
index 0eed37d8a..63738aa3f 100644
--- a/plugins/channelmimo/interferometer/interferometer.h
+++ b/plugins/channelmimo/interferometer/interferometer.h
@@ -45,20 +45,23 @@ public:
 
     public:
         const InterferometerSettings& getSettings() const { return m_settings; }
+        const QList<QString>& getSettingsKeys() const { return m_settingsKeys; }
         bool getForce() const { return m_force; }
 
-        static MsgConfigureInterferometer* create(const InterferometerSettings& settings, bool force)
+        static MsgConfigureInterferometer* create(const InterferometerSettings& settings, const QList<QString>& settingsKeys, bool force)
         {
-            return new MsgConfigureInterferometer(settings, force);
+            return new MsgConfigureInterferometer(settings, settingsKeys, force);
         }
 
     private:
         InterferometerSettings m_settings;
+        QList<QString> m_settingsKeys;
         bool m_force;
 
-        MsgConfigureInterferometer(const InterferometerSettings& settings, bool force) :
+        MsgConfigureInterferometer(const InterferometerSettings& settings, const QList<QString>& settingsKeys, bool force) :
             Message(),
             m_settings(settings),
+            m_settingsKeys(settingsKeys),
             m_force(force)
         { }
     };
@@ -86,6 +89,24 @@ public:
         qint64 m_centerFrequency;
     };
 
+    class MsgReportDevices : public Message {
+        MESSAGE_CLASS_DECLARATION
+
+    public:
+        QList<int>& getDeviceSetIndexes() { return m_deviceSetIndexes; }
+
+        static MsgReportDevices* create() {
+            return new MsgReportDevices();
+        }
+
+    private:
+        QList<int> m_deviceSetIndexes;
+
+        MsgReportDevices() :
+            Message()
+        { }
+    };
+
     Interferometer(DeviceAPI *deviceAPI);
 	virtual ~Interferometer();
 	virtual void destroy() { delete this; }
@@ -128,6 +149,7 @@ public:
     SpectrumVis *getSpectrumVis() { return &m_spectrumVis; }
     ScopeVis *getScopeVis() { return &m_scopeSink; }
     void applyChannelSettings(uint32_t log2Decim, uint32_t filterChainHash);
+    const QList<int>& getDeviceSetList() { return m_localInputDeviceIndexes; }
 
     virtual int webapiSettingsGet(
             SWGSDRangel::SWGChannelSettings& response,
@@ -174,19 +196,22 @@ private:
     uint32_t m_deviceSampleRate;
     int m_count0, m_count1;
 
+    QList<int> m_localInputDeviceIndexes;
+
 	virtual bool handleMessage(const Message& cmd); //!< Processing of a message. Returns true if message has actually been processed
-    void applySettings(const InterferometerSettings& settings, bool force = false);
+    void applySettings(const InterferometerSettings& settings, const QList<QString>& settingsKeys, bool force = false);
     static void validateFilterChainHash(InterferometerSettings& settings);
     void calculateFrequencyOffset();
-    void webapiReverseSendSettings(QList<QString>& channelSettingsKeys, const InterferometerSettings& settings, bool force);
+    void updateDeviceSetList();
+    void webapiReverseSendSettings(const QList<QString>& channelSettingsKeys, const InterferometerSettings& settings, bool force);
     void sendChannelSettings(
         const QList<ObjectPipe*>& pipes,
-        QList<QString>& channelSettingsKeys,
+        const QList<QString>& channelSettingsKeys,
         const InterferometerSettings& settings,
         bool force
     );
     void webapiFormatChannelSettings(
-        QList<QString>& channelSettingsKeys,
+        const QList<QString>& channelSettingsKeys,
         SWGSDRangel::SWGChannelSettings *swgChannelSettings,
         const InterferometerSettings& settings,
         bool force
diff --git a/plugins/channelmimo/interferometer/interferometergui.cpp b/plugins/channelmimo/interferometer/interferometergui.cpp
index faff6c994..ec467d1e7 100644
--- a/plugins/channelmimo/interferometer/interferometergui.cpp
+++ b/plugins/channelmimo/interferometer/interferometergui.cpp
@@ -86,14 +86,26 @@ bool InterferometerGUI::handleMessage(const Message& message)
     }
     else if (Interferometer::MsgConfigureInterferometer::match(message))
     {
-        const Interferometer::MsgConfigureInterferometer& notif = (const Interferometer::MsgConfigureInterferometer&) message;
-        m_settings = notif.getSettings();
+        const Interferometer::MsgConfigureInterferometer& cfg = (const Interferometer::MsgConfigureInterferometer&) message;
+
+        if (cfg.getForce()) {
+            m_settings = cfg.getSettings();
+        } else {
+            m_settings.applySettings(cfg.getSettingsKeys(), cfg.getSettings());
+        }
+
         ui->scopeGUI->updateSettings();
         ui->spectrumGUI->updateSettings();
         m_channelMarker.updateSettings(static_cast<const ChannelMarker*>(m_settings.m_channelMarker));
         displaySettings();
         return true;
     }
+    else if (Interferometer::MsgReportDevices::match(message))
+    {
+        Interferometer::MsgReportDevices& report = (Interferometer::MsgReportDevices&) message;
+        updateDeviceSetList(report.getDeviceSetIndexes());
+        return true;
+    }
     else
     {
         return false;
@@ -165,6 +177,7 @@ InterferometerGUI::InterferometerGUI(PluginAPI* pluginAPI, DeviceUISet *deviceUI
 
     connect(getInputMessageQueue(), SIGNAL(messageEnqueued()), this, SLOT(handleSourceMessages()));
 
+    updateDeviceSetList(m_interferometer->getDeviceSetList());
     displaySettings();
     makeUIConnections();
     displayRateAndShift();
@@ -188,9 +201,11 @@ void InterferometerGUI::applySettings(bool force)
     {
         setTitleColor(m_channelMarker.getColor());
 
-        Interferometer::MsgConfigureInterferometer* message = Interferometer::MsgConfigureInterferometer::create(m_settings, force);
+        Interferometer::MsgConfigureInterferometer* message = Interferometer::MsgConfigureInterferometer::create(m_settings, m_settingsKeys, force);
         m_interferometer->getInputMessageQueue()->push(message);
     }
+
+    m_settingsKeys.clear();
 }
 
 void InterferometerGUI::displaySettings()
@@ -294,27 +309,53 @@ void InterferometerGUI::onMenuDialogCalled(const QPoint &p)
         setTitle(m_channelMarker.getTitle());
         setTitleColor(m_settings.m_rgbColor);
 
+        m_settingsKeys.append("title");
+        m_settingsKeys.append("rgbColor");
+        m_settingsKeys.append("useReverseAPI");
+        m_settingsKeys.append("reverseAPIAddress");
+        m_settingsKeys.append("reverseAPIPort");
+        m_settingsKeys.append("reverseAPIFeatureSetIndex");
+        m_settingsKeys.append("reverseAPIFeatureIndex");
+
         applySettings();
     }
 
     resetContextMenuType();
 }
 
+void InterferometerGUI::updateDeviceSetList(const QList<int>& deviceSetIndexes)
+{
+    QList<int>::const_iterator it = deviceSetIndexes.begin();
+
+    ui->localDevice->blockSignals(true);
+
+    ui->localDevice->clear();
+
+    for (; it != deviceSetIndexes.end(); ++it) {
+        ui->localDevice->addItem(QString("R%1").arg(*it), *it);
+    }
+
+    ui->localDevice->blockSignals(false);
+}
+
 void InterferometerGUI::on_decimationFactor_currentIndexChanged(int index)
 {
     m_settings.m_log2Decim = index;
+    m_settingsKeys.append("log2Decim");
     applyDecimation();
 }
 
 void InterferometerGUI::on_position_valueChanged(int value)
 {
     m_settings.m_filterChainHash = value;
+    m_settingsKeys.append("filterChainHash");
     applyPosition();
 }
 
 void InterferometerGUI::on_phaseCorrection_valueChanged(int value)
 {
     m_settings.m_phase = value;
+    m_settingsKeys.append("phase");
     ui->phaseCorrectionText->setText(tr("%1").arg(value));
     applySettings();
 }
@@ -322,6 +363,7 @@ void InterferometerGUI::on_phaseCorrection_valueChanged(int value)
 void InterferometerGUI::on_gain_valueChanged(int value)
 {
     m_settings.m_gain = value;
+    m_settingsKeys.append("gain");
     ui->gainText->setText(QString("%1").arg(m_settings.m_gain / 10.0, 0, 'f', 1));
     applySettings();
 }
@@ -341,6 +383,7 @@ void InterferometerGUI::on_gainLabel_clicked()
 void InterferometerGUI::on_correlationType_currentIndexChanged(int index)
 {
     m_settings.m_correlationType = (InterferometerSettings::CorrelationType) index;
+    m_settingsKeys.append("correlationType");
     applySettings();
 }
 
@@ -355,6 +398,7 @@ void InterferometerGUI::applyDecimation()
     ui->position->setMaximum(maxHash-1);
     ui->position->setValue(m_settings.m_filterChainHash);
     m_settings.m_filterChainHash = ui->position->value();
+    m_settingsKeys.append("filterChainHash");
     applyPosition();
 }
 
diff --git a/plugins/channelmimo/interferometer/interferometergui.h b/plugins/channelmimo/interferometer/interferometergui.h
index 0662d8e71..d95072148 100644
--- a/plugins/channelmimo/interferometer/interferometergui.h
+++ b/plugins/channelmimo/interferometer/interferometergui.h
@@ -70,6 +70,7 @@ private:
 	ChannelMarker m_channelMarker;
     RollupState m_rollupState;
     InterferometerSettings m_settings;
+    QList<QString> m_settingsKeys;
     int m_sampleRate;
     qint64 m_centerFrequency;
     double m_shiftFrequencyFactor; //!< Channel frequency shift factor
@@ -93,6 +94,7 @@ private:
     bool handleMessage(const Message& message);
     void makeUIConnections();
     void updateAbsoluteCenterFrequency();
+    void updateDeviceSetList(const QList<int>& deviceSetIndexes);
 
 	void leaveEvent(QEvent*);
 	void enterEvent(EnterEventType*);
diff --git a/plugins/channelmimo/interferometer/interferometergui.ui b/plugins/channelmimo/interferometer/interferometergui.ui
index f9e9927a0..3d0b1107b 100644
--- a/plugins/channelmimo/interferometer/interferometergui.ui
+++ b/plugins/channelmimo/interferometer/interferometergui.ui
@@ -416,6 +416,60 @@
           </property>
          </widget>
         </item>
+        <item>
+         <widget class="Line" name="line_3">
+          <property name="orientation">
+           <enum>Qt::Vertical</enum>
+          </property>
+         </widget>
+        </item>
+        <item>
+         <widget class="QLabel" name="localDeviceLabel">
+          <property name="text">
+           <string>Device</string>
+          </property>
+         </widget>
+        </item>
+        <item>
+         <widget class="QComboBox" name="localDevice">
+          <property name="minimumSize">
+           <size>
+            <width>50</width>
+            <height>0</height>
+           </size>
+          </property>
+          <property name="maximumSize">
+           <size>
+            <width>50</width>
+            <height>16777215</height>
+           </size>
+          </property>
+          <property name="toolTip">
+           <string>Local input device deviceset index</string>
+          </property>
+         </widget>
+        </item>
+        <item>
+         <widget class="ButtonSwitch" name="localDevicePlay">
+          <property name="maximumSize">
+           <size>
+            <width>24</width>
+            <height>24</height>
+           </size>
+          </property>
+          <property name="toolTip">
+           <string>Start/Stop sending IQ to local input device</string>
+          </property>
+          <property name="text">
+           <string/>
+          </property>
+          <property name="icon">
+           <iconset resource="../../../sdrgui/resources/res.qrc">
+            <normaloff>:/play.png</normaloff>
+            <normalon>:/pause.png</normalon>:/play.png</iconset>
+          </property>
+         </widget>
+        </item>
        </layout>
       </item>
      </layout>
@@ -588,6 +642,11 @@
    <header>gui/glscopegui.h</header>
    <container>1</container>
   </customwidget>
+  <customwidget>
+   <class>ButtonSwitch</class>
+   <extends>QToolButton</extends>
+   <header>gui/buttonswitch.h</header>
+  </customwidget>
   <customwidget>
    <class>ClickableLabel</class>
    <extends>QLabel</extends>
diff --git a/plugins/channelmimo/interferometer/interferometersettings.cpp b/plugins/channelmimo/interferometer/interferometersettings.cpp
index 0102d2957..68bd6e9de 100644
--- a/plugins/channelmimo/interferometer/interferometersettings.cpp
+++ b/plugins/channelmimo/interferometer/interferometersettings.cpp
@@ -41,6 +41,7 @@ void InterferometerSettings::resetToDefaults()
     m_filterChainHash = 0;
     m_phase = 0;
     m_gain = 0;
+    m_localDeviceIndex = -1;
     m_reverseAPIAddress = "127.0.0.1";
     m_reverseAPIPort = 8888;
     m_reverseAPIDeviceIndex = 0;
@@ -68,6 +69,7 @@ QByteArray InterferometerSettings::serialize() const
     s.writeBlob(14, m_geometryBytes);
     s.writeBool(15, m_hidden);
     s.writeS32(16, m_gain);
+    s.writeS32(17, m_localDeviceIndex);
 
     if (m_spectrumGUI) {
         s.writeBlob(20, m_spectrumGUI->serialize());
@@ -128,6 +130,7 @@ bool InterferometerSettings::deserialize(const QByteArray& data)
         d.readBlob(14, &m_geometryBytes);
         d.readBool(15, &m_hidden, false);
         d.readS32(16, &m_gain, 0);
+        d.readS32(17, &m_localDeviceIndex, -1);
 
         if (m_spectrumGUI)
         {
@@ -161,3 +164,99 @@ bool InterferometerSettings::deserialize(const QByteArray& data)
         return false;
     }
 }
+
+void InterferometerSettings::applySettings(const QStringList& settingsKeys, const InterferometerSettings& settings)
+{
+    if (settingsKeys.contains("correlationType")) {
+        m_correlationType = settings.m_correlationType;
+    }
+    if (settingsKeys.contains("rgbColor")) {
+        m_rgbColor = settings.m_rgbColor;
+    }
+    if (settingsKeys.contains("title")) {
+        m_title = settings.m_title;
+    }
+    if (settingsKeys.contains("log2Decim")) {
+        m_log2Decim = settings.m_log2Decim;
+    }
+    if (settingsKeys.contains("filterChainHash")) {
+        m_filterChainHash = settings.m_filterChainHash;
+    }
+    if (settingsKeys.contains("phase")) {
+        m_phase = settings.m_phase;
+    }
+    if (settingsKeys.contains("gain")) {
+        m_gain = settings.m_gain;
+    }
+    if (settingsKeys.contains("localDeviceIndex")) {
+        m_localDeviceIndex = settings.m_localDeviceIndex;
+    }
+    if (settingsKeys.contains("reverseAPIAddress")) {
+        m_reverseAPIAddress = settings.m_reverseAPIAddress;
+    }
+    if (settingsKeys.contains("reverseAPIPort")) {
+        m_reverseAPIPort = settings.m_reverseAPIPort;
+    }
+    if (settingsKeys.contains("reverseAPIDeviceIndex")) {
+        m_reverseAPIDeviceIndex = settings.m_reverseAPIDeviceIndex;
+    }
+    if (settingsKeys.contains("reverseAPIChannelIndex")) {
+        m_reverseAPIChannelIndex = settings.m_reverseAPIChannelIndex;
+    }
+    if (settingsKeys.contains("workspaceIndex")) {
+        m_workspaceIndex = settings.m_workspaceIndex;
+    }
+    if (settingsKeys.contains("hidden")) {
+        m_hidden = settings.m_hidden;
+    }
+}
+
+QString InterferometerSettings::getDebugString(const QStringList& settingsKeys, bool force) const
+{
+    std::ostringstream ostr;
+
+    if (settingsKeys.contains("correlationType")) {
+        ostr << " m_correlationType: " << m_correlationType;
+    }
+    if (settingsKeys.contains("rgbColor")) {
+        ostr << " m_rgbColor: " << m_rgbColor;
+    }
+    if (settingsKeys.contains("title")) {
+        ostr << " m_title: " << m_title.toStdString();
+    }
+    if (settingsKeys.contains("log2Decim")) {
+        ostr << " m_log2Decim: " << m_log2Decim;
+    }
+    if (settingsKeys.contains("filterChainHash")) {
+        ostr << " m_filterChainHash: " << m_filterChainHash;
+    }
+    if (settingsKeys.contains("phase")) {
+        ostr << " m_phase: " << m_phase;
+    }
+    if (settingsKeys.contains("gain")) {
+        ostr << " m_gain: " << m_gain;
+    }
+    if (settingsKeys.contains("localDeviceIndex")) {
+        ostr << " m_localDeviceIndex: " << m_localDeviceIndex;
+    }
+    if (settingsKeys.contains("reverseAPIAddress")) {
+        ostr << " m_reverseAPIAddress: " << m_reverseAPIAddress.toStdString();
+    }
+    if (settingsKeys.contains("reverseAPIPort")) {
+        ostr << " m_reverseAPIPort: " << m_reverseAPIPort;
+    }
+    if (settingsKeys.contains("reverseAPIDeviceIndex")) {
+        ostr << " m_reverseAPIDeviceIndex: " << m_reverseAPIDeviceIndex;
+    }
+    if (settingsKeys.contains("reverseAPIChannelIndex")) {
+        ostr << " m_reverseAPIChannelIndex: " << m_reverseAPIChannelIndex;
+    }
+    if (settingsKeys.contains("workspaceIndex")) {
+        ostr << " m_workspaceIndex: " << m_workspaceIndex;
+    }
+    if (settingsKeys.contains("hidden")) {
+        ostr << " m_hidden: " << m_hidden;
+    }
+
+    return QString(ostr.str().c_str());
+}
diff --git a/plugins/channelmimo/interferometer/interferometersettings.h b/plugins/channelmimo/interferometer/interferometersettings.h
index 5df39261e..68b8789de 100644
--- a/plugins/channelmimo/interferometer/interferometersettings.h
+++ b/plugins/channelmimo/interferometer/interferometersettings.h
@@ -47,6 +47,7 @@ struct InterferometerSettings
     uint32_t m_filterChainHash;
     int m_phase;
     int m_gain;
+    int m_localDeviceIndex;
     bool m_useReverseAPI;
     QString m_reverseAPIAddress;
     uint16_t m_reverseAPIPort;
@@ -69,6 +70,8 @@ struct InterferometerSettings
     void setScopeGUI(Serializable *scopeGUI) { m_scopeGUI = scopeGUI; }
     QByteArray serialize() const;
     bool deserialize(const QByteArray& data);
+    void applySettings(const QStringList& settingsKeys, const InterferometerSettings& settings);
+    QString getDebugString(const QStringList& settingsKeys, bool force=false) const;
 };
 
 #endif // INCLUDE_INTERFEROMETERSETTINGS_H