diff --git a/plugins/channeltx/modam/ammod.cpp b/plugins/channeltx/modam/ammod.cpp
index ad5f2aebe..d8fe9016f 100644
--- a/plugins/channeltx/modam/ammod.cpp
+++ b/plugins/channeltx/modam/ammod.cpp
@@ -80,6 +80,7 @@ AMMod::AMMod(DeviceSinkAPI *deviceAPI) :
     m_deviceAPI->addThreadedSource(m_threadedChannelizer);
     m_deviceAPI->addChannelAPI(this);
 
+    applyChannelSettings(m_basebandSampleRate, m_outputSampleRate, m_inputFrequencyOffset, true);
     applySettings(m_settings, true);
 }
 
@@ -255,6 +256,7 @@ void AMMod::start()
 			<< " m_inputFrequencyOffset: " << m_settings.m_inputFrequencyOffset;
 
 	m_audioFifo.clear();
+	applyChannelSettings(m_basebandSampleRate, m_outputSampleRate, m_inputFrequencyOffset, true);
 }
 
 void AMMod::stop()
@@ -376,7 +378,7 @@ void AMMod::seekFileStream(int seekPercentage)
     }
 }
 
-void AMMod::applyChannelSettings(int basebandSampleRate, int outputSampleRate, int inputFrequencyOffset)
+void AMMod::applyChannelSettings(int basebandSampleRate, int outputSampleRate, int inputFrequencyOffset, bool force)
 {
     qDebug() << "AMMod::applyChannelSettings:"
             << " basebandSampleRate: " << basebandSampleRate
@@ -384,14 +386,14 @@ void AMMod::applyChannelSettings(int basebandSampleRate, int outputSampleRate, i
             << " inputFrequencyOffset: " << inputFrequencyOffset;
 
     if ((inputFrequencyOffset != m_inputFrequencyOffset) ||
-        (outputSampleRate != m_outputSampleRate))
+        (outputSampleRate != m_outputSampleRate) || force)
     {
         m_settingsMutex.lock();
         m_carrierNco.setFreq(inputFrequencyOffset, outputSampleRate);
         m_settingsMutex.unlock();
     }
 
-    if (outputSampleRate != m_outputSampleRate)
+    if ((outputSampleRate != m_outputSampleRate) || force)
     {
         m_settingsMutex.lock();
         m_interpolatorDistanceRemain = 0;
diff --git a/plugins/channeltx/modam/ammod.h b/plugins/channeltx/modam/ammod.h
index a1ba2726b..0dc73ac09 100644
--- a/plugins/channeltx/modam/ammod.h
+++ b/plugins/channeltx/modam/ammod.h
@@ -310,7 +310,7 @@ private:
 
     static const int m_levelNbSamples;
 
-    void applyChannelSettings(int basebandSampleRate, int outputSampleRate, int inputFrequencyOffset);
+    void applyChannelSettings(int basebandSampleRate, int outputSampleRate, int inputFrequencyOffset, bool force = false);
     void applySettings(const AMModSettings& settings, bool force = false);
     void pullAF(Real& sample);
     void calculateLevel(Real& sample);
diff --git a/plugins/channeltx/modatv/atvmod.cpp b/plugins/channeltx/modatv/atvmod.cpp
index 5c3e2164b..f28b6ae93 100644
--- a/plugins/channeltx/modatv/atvmod.cpp
+++ b/plugins/channeltx/modatv/atvmod.cpp
@@ -97,6 +97,7 @@ ATVMod::ATVMod(DeviceSinkAPI *deviceAPI) :
     m_deviceAPI->addThreadedSource(m_threadedChannelizer);
     m_deviceAPI->addChannelAPI(this);
 
+    applyChannelSettings(m_outputSampleRate, m_inputFrequencyOffset, true);
     applySettings(m_settings, true); // does applyStandard() too;
 }
 
@@ -489,6 +490,7 @@ void ATVMod::start()
 {
     qDebug() << "ATVMod::start: m_outputSampleRate: " << m_outputSampleRate
             << " m_inputFrequencyOffset: " << m_settings.m_inputFrequencyOffset;
+    applyChannelSettings(m_outputSampleRate, m_inputFrequencyOffset, true);
 }
 
 void ATVMod::stop()
@@ -1024,21 +1026,21 @@ void ATVMod::mixImageAndText(cv::Mat& image)
     cv::putText(image, m_overlayText, textOrg, fontFace, fontScale, cv::Scalar::all(255*m_settings.m_uniformLevel), thickness, CV_AA);
 }
 
-void ATVMod::applyChannelSettings(int outputSampleRate, int inputFrequencyOffset)
+void ATVMod::applyChannelSettings(int outputSampleRate, int inputFrequencyOffset, bool force)
 {
     qDebug() << "AMMod::applyChannelSettings:"
             << " outputSampleRate: " << outputSampleRate
             << " inputFrequencyOffset: " << inputFrequencyOffset;
 
     if ((inputFrequencyOffset != m_inputFrequencyOffset) ||
-        (outputSampleRate != m_outputSampleRate))
+        (outputSampleRate != m_outputSampleRate) || force)
     {
         m_settingsMutex.lock();
         m_carrierNco.setFreq(inputFrequencyOffset, outputSampleRate);
         m_settingsMutex.unlock();
     }
 
-    if (outputSampleRate != m_outputSampleRate)
+    if ((outputSampleRate != m_outputSampleRate) || force)
     {
         getBaseValues(outputSampleRate, m_settings.m_nbLines * m_settings.m_fps, m_tvSampleRate, m_pointsPerLine);
 
diff --git a/plugins/channeltx/modatv/atvmod.h b/plugins/channeltx/modatv/atvmod.h
index 852e623d7..7045ad66d 100644
--- a/plugins/channeltx/modatv/atvmod.h
+++ b/plugins/channeltx/modatv/atvmod.h
@@ -561,7 +561,7 @@ private:
     static const int m_nbBars; //!< number of bars in bar or chessboard patterns
     static const int m_cameraFPSTestNbFrames; //!< number of frames for camera FPS test
 
-    void applyChannelSettings(int outputSampleRate, int inputFrequencyOffset);
+    void applyChannelSettings(int outputSampleRate, int inputFrequencyOffset, bool force = false);
     void applySettings(const ATVModSettings& settings, bool force = false);
     void pullFinalize(Complex& ci, Sample& sample);
     void pullVideo(Real& sample);
diff --git a/plugins/channeltx/modnfm/nfmmod.cpp b/plugins/channeltx/modnfm/nfmmod.cpp
index 24c5b37f9..dad97319c 100644
--- a/plugins/channeltx/modnfm/nfmmod.cpp
+++ b/plugins/channeltx/modnfm/nfmmod.cpp
@@ -86,6 +86,7 @@ NFMMod::NFMMod(DeviceSinkAPI *deviceAPI) :
     m_deviceAPI->addThreadedSource(m_threadedChannelizer);
     m_deviceAPI->addChannelAPI(this);
 
+    applyChannelSettings(m_basebandSampleRate, m_outputSampleRate, m_inputFrequencyOffset, true);
     applySettings(m_settings, true);
 }
 
@@ -270,6 +271,7 @@ void NFMMod::start()
 			<< " m_inputFrequencyOffset: " << m_inputFrequencyOffset;
 
 	m_audioFifo.clear();
+	applyChannelSettings(m_basebandSampleRate, m_outputSampleRate, m_inputFrequencyOffset, true);
 }
 
 void NFMMod::stop()
@@ -385,7 +387,7 @@ void NFMMod::seekFileStream(int seekPercentage)
     }
 }
 
-void NFMMod::applyChannelSettings(int basebandSampleRate, int outputSampleRate, int inputFrequencyOffset)
+void NFMMod::applyChannelSettings(int basebandSampleRate, int outputSampleRate, int inputFrequencyOffset, bool force)
 {
     qDebug() << "NFMMod::applyChannelSettings:"
             << " basebandSampleRate: " << basebandSampleRate
@@ -393,14 +395,14 @@ void NFMMod::applyChannelSettings(int basebandSampleRate, int outputSampleRate,
             << " inputFrequencyOffset: " << inputFrequencyOffset;
 
     if ((inputFrequencyOffset != m_inputFrequencyOffset) ||
-        (outputSampleRate != m_outputSampleRate))
+        (outputSampleRate != m_outputSampleRate) || force)
     {
         m_settingsMutex.lock();
         m_carrierNco.setFreq(inputFrequencyOffset, outputSampleRate);
         m_settingsMutex.unlock();
     }
 
-    if (outputSampleRate != m_outputSampleRate)
+    if ((outputSampleRate != m_outputSampleRate) || force)
     {
         m_settingsMutex.lock();
         m_interpolatorDistanceRemain = 0;
diff --git a/plugins/channeltx/modnfm/nfmmod.h b/plugins/channeltx/modnfm/nfmmod.h
index 233a38edb..6725c56d5 100644
--- a/plugins/channeltx/modnfm/nfmmod.h
+++ b/plugins/channeltx/modnfm/nfmmod.h
@@ -304,7 +304,7 @@ private:
     CWKeyer m_cwKeyer;
     static const int m_levelNbSamples;
 
-    void applyChannelSettings(int basebandSampleRate, int outputSampleRate, int inputFrequencyOffset);
+    void applyChannelSettings(int basebandSampleRate, int outputSampleRate, int inputFrequencyOffset, bool force = false);
     void applySettings(const NFMModSettings& settings, bool force = false);
     void pullAF(Real& sample);
     void calculateLevel(Real& sample);
diff --git a/plugins/channeltx/modssb/ssbmod.cpp b/plugins/channeltx/modssb/ssbmod.cpp
index be668c836..ad90f716e 100644
--- a/plugins/channeltx/modssb/ssbmod.cpp
+++ b/plugins/channeltx/modssb/ssbmod.cpp
@@ -104,6 +104,7 @@ SSBMod::SSBMod(DeviceSinkAPI *deviceAPI) :
     m_deviceAPI->addThreadedSource(m_threadedChannelizer);
     m_deviceAPI->addChannelAPI(this);
 
+    applyChannelSettings(m_basebandSampleRate, m_outputSampleRate, m_inputFrequencyOffset, true);
     applySettings(m_settings, true);
 }
 
@@ -528,6 +529,7 @@ void SSBMod::start()
 			<< " m_inputFrequencyOffset: " << m_settings.m_inputFrequencyOffset;
 
 	m_audioFifo.clear();
+	applyChannelSettings(m_basebandSampleRate, m_outputSampleRate, m_inputFrequencyOffset, true);
 }
 
 void SSBMod::stop()
@@ -645,7 +647,7 @@ void SSBMod::seekFileStream(int seekPercentage)
     }
 }
 
-void SSBMod::applyChannelSettings(int basebandSampleRate, int outputSampleRate, int inputFrequencyOffset)
+void SSBMod::applyChannelSettings(int basebandSampleRate, int outputSampleRate, int inputFrequencyOffset, bool force)
 {
     qDebug() << "SSBMod::applyChannelSettings:"
             << " basebandSampleRate: " << basebandSampleRate
@@ -653,14 +655,14 @@ void SSBMod::applyChannelSettings(int basebandSampleRate, int outputSampleRate,
             << " inputFrequencyOffset: " << inputFrequencyOffset;
 
     if ((inputFrequencyOffset != m_inputFrequencyOffset) ||
-        (outputSampleRate != m_outputSampleRate))
+        (outputSampleRate != m_outputSampleRate) || force)
     {
         m_settingsMutex.lock();
         m_carrierNco.setFreq(inputFrequencyOffset, outputSampleRate);
         m_settingsMutex.unlock();
     }
 
-    if (outputSampleRate != m_outputSampleRate)
+    if ((outputSampleRate != m_outputSampleRate) || force)
     {
         m_settingsMutex.lock();
         m_interpolatorDistanceRemain = 0;
diff --git a/plugins/channeltx/modssb/ssbmod.h b/plugins/channeltx/modssb/ssbmod.h
index e5a1db10e..79c2fe620 100644
--- a/plugins/channeltx/modssb/ssbmod.h
+++ b/plugins/channeltx/modssb/ssbmod.h
@@ -327,7 +327,7 @@ private:
 
     static const int m_levelNbSamples;
 
-    void applyChannelSettings(int basebandSampleRate, int outputSampleRate, int inputFrequencyOffset);
+    void applyChannelSettings(int basebandSampleRate, int outputSampleRate, int inputFrequencyOffset, bool force = false);
     void applySettings(const SSBModSettings& settings, bool force = false);
     void pullAF(Complex& sample);
     void calculateLevel(Complex& sample);
diff --git a/plugins/channeltx/modwfm/wfmmod.cpp b/plugins/channeltx/modwfm/wfmmod.cpp
index aa33fd0ef..3801a255f 100644
--- a/plugins/channeltx/modwfm/wfmmod.cpp
+++ b/plugins/channeltx/modwfm/wfmmod.cpp
@@ -92,6 +92,7 @@ WFMMod::WFMMod(DeviceSinkAPI *deviceAPI) :
     m_deviceAPI->addThreadedSource(m_threadedChannelizer);
     m_deviceAPI->addChannelAPI(this);
 
+    applyChannelSettings(m_basebandSampleRate, m_outputSampleRate, m_inputFrequencyOffset, true);
     applySettings(m_settings, true);
 }
 
@@ -282,6 +283,7 @@ void WFMMod::start()
 			<< " m_inputFrequencyOffset: " << m_inputFrequencyOffset;
 
 	m_audioFifo.clear();
+	applyChannelSettings(m_basebandSampleRate, m_outputSampleRate, m_inputFrequencyOffset, true);
 }
 
 void WFMMod::stop()
@@ -402,7 +404,7 @@ void WFMMod::seekFileStream(int seekPercentage)
     }
 }
 
-void WFMMod::applyChannelSettings(int basebandSampleRate, int outputSampleRate, int inputFrequencyOffset)
+void WFMMod::applyChannelSettings(int basebandSampleRate, int outputSampleRate, int inputFrequencyOffset, bool force)
 {
     qDebug() << "WFMMod::applyChannelSettings:"
             << " basebandSampleRate: " << basebandSampleRate
@@ -410,14 +412,14 @@ void WFMMod::applyChannelSettings(int basebandSampleRate, int outputSampleRate,
             << " inputFrequencyOffset: " << inputFrequencyOffset;
 
     if ((inputFrequencyOffset != m_inputFrequencyOffset) ||
-        (outputSampleRate != m_outputSampleRate))
+        (outputSampleRate != m_outputSampleRate) || force)
     {
         m_settingsMutex.lock();
         m_carrierNco.setFreq(inputFrequencyOffset, outputSampleRate);
         m_settingsMutex.unlock();
     }
 
-    if (outputSampleRate != m_outputSampleRate)
+    if ((outputSampleRate != m_outputSampleRate) || force)
     {
         m_settingsMutex.lock();
         m_interpolatorDistanceRemain = 0;
diff --git a/plugins/channeltx/modwfm/wfmmod.h b/plugins/channeltx/modwfm/wfmmod.h
index 37c8cbffd..baf6e08a1 100644
--- a/plugins/channeltx/modwfm/wfmmod.h
+++ b/plugins/channeltx/modwfm/wfmmod.h
@@ -317,7 +317,7 @@ private:
     CWKeyer m_cwKeyer;
     static const int m_levelNbSamples;
 
-    void applyChannelSettings(int basebandSampleRate, int outputSampleRate, int inputFrequencyOffset);
+    void applyChannelSettings(int basebandSampleRate, int outputSampleRate, int inputFrequencyOffset, bool force = false);
     void applySettings(const WFMModSettings& settings, bool force = false);
     void pullAF(Complex& sample);
     void calculateLevel(const Real& sample);
diff --git a/plugins/channeltx/udpsink/udpsink.cpp b/plugins/channeltx/udpsink/udpsink.cpp
index 2814bb0b4..889376930 100644
--- a/plugins/channeltx/udpsink/udpsink.cpp
+++ b/plugins/channeltx/udpsink/udpsink.cpp
@@ -71,6 +71,7 @@ UDPSink::UDPSink(DeviceSinkAPI *deviceAPI) :
     m_deviceAPI->addThreadedSource(m_threadedChannelizer);
     m_deviceAPI->addChannelAPI(this);
 
+    applyChannelSettings(m_basebandSampleRate, m_outputSampleRate, m_inputFrequencyOffset, true);
     applySettings(m_settings, true);
 }
 
@@ -87,6 +88,7 @@ UDPSink::~UDPSink()
 void UDPSink::start()
 {
     m_udpHandler.start();
+    applyChannelSettings(m_basebandSampleRate, m_outputSampleRate, m_inputFrequencyOffset, true);
 }
 
 void UDPSink::stop()
@@ -439,7 +441,7 @@ void UDPSink::resetReadIndex()
     getInputMessageQueue()->push(cmd);
 }
 
-void UDPSink::applyChannelSettings(int basebandSampleRate, int outputSampleRate, int inputFrequencyOffset)
+void UDPSink::applyChannelSettings(int basebandSampleRate, int outputSampleRate, int inputFrequencyOffset, bool force)
 {
     qDebug() << "UDPSink::applyChannelSettings:"
             << " basebandSampleRate: " << basebandSampleRate
@@ -447,14 +449,14 @@ void UDPSink::applyChannelSettings(int basebandSampleRate, int outputSampleRate,
             << " inputFrequencyOffset: " << inputFrequencyOffset;
 
     if ((inputFrequencyOffset != m_inputFrequencyOffset) ||
-        (outputSampleRate != m_outputSampleRate))
+        (outputSampleRate != m_outputSampleRate) || force)
     {
         m_settingsMutex.lock();
         m_carrierNco.setFreq(inputFrequencyOffset, outputSampleRate);
         m_settingsMutex.unlock();
     }
 
-    if ((outputSampleRate != m_outputSampleRate) && (!m_settings.m_autoRWBalance))
+    if (((outputSampleRate != m_outputSampleRate) && (!m_settings.m_autoRWBalance)) || force)
     {
         m_settingsMutex.lock();
         m_interpolatorDistanceRemain = 0;
diff --git a/plugins/channeltx/udpsink/udpsink.h b/plugins/channeltx/udpsink/udpsink.h
index 52f3d9f3f..910936b33 100644
--- a/plugins/channeltx/udpsink/udpsink.h
+++ b/plugins/channeltx/udpsink/udpsink.h
@@ -219,7 +219,7 @@ private:
     static const int m_sampleRateAverageItems = 17;
     static const int m_ssbFftLen = 1024;
 
-    void applyChannelSettings(int basebandSampleRate, int outputSampleRate, int inputFrequencyOffset);
+    void applyChannelSettings(int basebandSampleRate, int outputSampleRate, int inputFrequencyOffset, bool force = false);
     void applySettings(const UDPSinkSettings& settings, bool force = false);
     void modulateSample();
     void calculateLevel(Real sample);