diff --git a/ft8/ft8.h b/ft8/ft8.h
index 326edc5f2..2e84f3ac3 100644
--- a/ft8/ft8.h
+++ b/ft8/ft8.h
@@ -85,8 +85,9 @@ struct FT8_API cdecode
 // total transmission time is 12.64 seconds
 
 // tunable parameters
-struct FT8_API FT8Params
+class FT8_API FT8Params
 {
+public:
     int nthreads;            // number of parallel threads, for multi-core
     int npasses_one;         // number of spectral subtraction passes
     int npasses_two;         // number of spectral subtraction passes
diff --git a/httpserver/httpconnectionhandlerpool.cpp b/httpserver/httpconnectionhandlerpool.cpp
index 6de3a2e0e..27314ef29 100644
--- a/httpserver/httpconnectionhandlerpool.cpp
+++ b/httpserver/httpconnectionhandlerpool.cpp
@@ -94,7 +94,7 @@ void HttpConnectionHandlerPool::cleanup()
             if (++idleCounter > maxIdleHandlers)
             {
                 pool.removeOne(handler);
-                qDebug("HttpConnectionHandlerPool: Removed connection handler (%p), pool size is now %i",handler,pool.size());
+                qDebug("HttpConnectionHandlerPool: Removed connection handler (%p), pool size is now %i",handler,(int)pool.size());
                 delete handler;
                 break; // remove only one handler in each interval
             }
diff --git a/httpserver/staticfilecontroller.cpp b/httpserver/staticfilecontroller.cpp
index 7db2c9563..686bff1f5 100644
--- a/httpserver/staticfilecontroller.cpp
+++ b/httpserver/staticfilecontroller.cpp
@@ -35,7 +35,7 @@ StaticFileController::StaticFileController(QSettings* settings, QObject* parent)
     maxCachedFileSize=settings->value("maxCachedFileSize","65536").toInt();
     cache.setMaxCost(settings->value("cacheSize","1000000").toInt());
     cacheTimeout=settings->value("cacheTime","60000").toInt();
-    qDebug("StaticFileController: cache timeout=%i, size=%i",cacheTimeout,cache.maxCost());
+    qDebug("StaticFileController: cache timeout=%i, size=%i",cacheTimeout,(int)cache.maxCost());
 }
 
 StaticFileController::StaticFileController(const HttpDocrootSettings& settings, QObject* parent)
@@ -56,7 +56,7 @@ StaticFileController::StaticFileController(const HttpDocrootSettings& settings,
     maxCachedFileSize=settings.maxCachedFileSize;
     cache.setMaxCost(settings.cacheSize);
     cacheTimeout=settings.cacheTime;
-    qDebug("StaticFileController: cache timeout=%i, size=%i",cacheTimeout,cache.maxCost());
+    qDebug("StaticFileController: cache timeout=%i, size=%i",cacheTimeout,(int)cache.maxCost());
 }
 
 void StaticFileController::service(HttpRequest& request, HttpResponse& response)
diff --git a/modemm17/Util.h b/modemm17/Util.h
index c446b6605..81a4a3209 100644
--- a/modemm17/Util.h
+++ b/modemm17/Util.h
@@ -239,7 +239,7 @@ constexpr T to_int(uint8_t v)
 {
     constexpr auto MAX_LOCAL_INPUT = (1 << (n - 1));
     constexpr auto NEGATIVE_OFFSET = std::numeric_limits<typename std::make_unsigned<T>::type>::max() - (MAX_LOCAL_INPUT - 1);
-    T r = v & (1 << (n - 1)) ? NEGATIVE_OFFSET : 0;
+    T r = v & (1 << (n - 1)) ? (T)NEGATIVE_OFFSET : 0;
     return r + (v & (MAX_LOCAL_INPUT - 1));
 }
 
diff --git a/plugins/channelmimo/beamsteeringcwmod/beamsteeringcwmod.h b/plugins/channelmimo/beamsteeringcwmod/beamsteeringcwmod.h
index fa2c614b3..052d1c704 100644
--- a/plugins/channelmimo/beamsteeringcwmod/beamsteeringcwmod.h
+++ b/plugins/channelmimo/beamsteeringcwmod/beamsteeringcwmod.h
@@ -158,8 +158,6 @@ private:
     BeamSteeringCWModBaseband* m_basebandSource;
     QMutex m_mutex;
     bool m_running;
-    BasebandSampleSink* m_spectrumSink;
-    BasebandSampleSink* m_scopeSink;
     BeamSteeringCWModSettings m_settings;
     MessageQueue *m_guiMessageQueue;  //!< Input message queue to the GUI
 
@@ -168,7 +166,6 @@ private:
 
     int64_t m_frequencyOffset;
     uint32_t m_basebandSampleRate;
-    int m_count0, m_count1;
 
    	virtual bool handleMessage(const Message& cmd); //!< Processing of a message. Returns true if message has actually been processed
     void applySettings(const BeamSteeringCWModSettings& settings, bool force = false);
diff --git a/plugins/channelmimo/doa2/doa2.h b/plugins/channelmimo/doa2/doa2.h
index 236f90b29..35e391f30 100644
--- a/plugins/channelmimo/doa2/doa2.h
+++ b/plugins/channelmimo/doa2/doa2.h
@@ -177,7 +177,6 @@ private:
     int64_t m_frequencyOffset;
     uint32_t m_deviceSampleRate;
     qint64 m_deviceCenterFrequency;
-    int m_count0, m_count1;
 
 	virtual bool handleMessage(const Message& cmd); //!< Processing of a message. Returns true if message has actually been processed
     void applySettings(const DOA2Settings& settings, bool force = false);
diff --git a/plugins/channelmimo/doa2/doa2corr.cpp b/plugins/channelmimo/doa2/doa2corr.cpp
index 97098387c..8354be90e 100644
--- a/plugins/channelmimo/doa2/doa2corr.cpp
+++ b/plugins/channelmimo/doa2/doa2corr.cpp
@@ -264,7 +264,7 @@ bool DOA2Correlator::performFFTProd(
             m_fft[0]->out() + m_fftSize,
             m_dataj,
             m_invFFT->in(),
-            [this](std::complex<float>& a, const std::complex<float>& b) -> std::complex<float> {
+            [](std::complex<float>& a, const std::complex<float>& b) -> std::complex<float> {
                 return (a*b);
             }
         );
diff --git a/plugins/channelmimo/doa2/doa2streamsink.h b/plugins/channelmimo/doa2/doa2streamsink.h
index 07612c5b7..61d51d855 100644
--- a/plugins/channelmimo/doa2/doa2streamsink.h
+++ b/plugins/channelmimo/doa2/doa2streamsink.h
@@ -44,9 +44,6 @@ private:
     int m_dataSize;
     int m_bufferSize;
     int m_dataStart;
-
-    uint32_t m_log2Decim;
-    uint32_t m_filterChainHash;
 };
 
 
diff --git a/plugins/channelmimo/interferometer/interferometer.h b/plugins/channelmimo/interferometer/interferometer.h
index 927282675..8e92fd1a5 100644
--- a/plugins/channelmimo/interferometer/interferometer.h
+++ b/plugins/channelmimo/interferometer/interferometer.h
@@ -196,7 +196,6 @@ private:
     uint64_t m_centerFrequency;
     int64_t m_frequencyOffset;
     uint32_t m_deviceSampleRate;
-    int m_count0, m_count1;
 
     QList<int> m_localInputDeviceIndexes;
 
diff --git a/plugins/channelmimo/interferometer/interferometercorr.cpp b/plugins/channelmimo/interferometer/interferometercorr.cpp
index 1c90c433d..ee95fabad 100644
--- a/plugins/channelmimo/interferometer/interferometercorr.cpp
+++ b/plugins/channelmimo/interferometer/interferometercorr.cpp
@@ -555,7 +555,7 @@ bool InterferometerCorrelator::performFFTProd(
             m_fft2[0]->out() + m_fftSize,
             m_dataj,
             m_invFFT2->in(),
-            [this](std::complex<float>& a, const std::complex<float>& b) -> std::complex<float> {
+            [](std::complex<float>& a, const std::complex<float>& b) -> std::complex<float> {
                 return (a*b);
             }
         );
diff --git a/plugins/channelmimo/interferometer/interferometerstreamsink.h b/plugins/channelmimo/interferometer/interferometerstreamsink.h
index e3cb8af99..43fbe7ea2 100644
--- a/plugins/channelmimo/interferometer/interferometerstreamsink.h
+++ b/plugins/channelmimo/interferometer/interferometerstreamsink.h
@@ -44,9 +44,6 @@ private:
     int m_dataSize;
     int m_bufferSize;
     int m_dataStart;
-
-    uint32_t m_log2Decim;
-    uint32_t m_filterChainHash;
 };
 
 
diff --git a/plugins/channelrx/channelpower/channelpowersink.cpp b/plugins/channelrx/channelpower/channelpowersink.cpp
index fa78ce2f1..f34c948ae 100644
--- a/plugins/channelrx/channelpower/channelpowersink.cpp
+++ b/plugins/channelrx/channelpower/channelpowersink.cpp
@@ -21,12 +21,13 @@
 #include "channelpowersink.h"
 
 ChannelPowerSink::ChannelPowerSink(ChannelPower *channelPower) :
-        m_channelPower(channelPower),
         m_channelSampleRate(10000),
         m_channelFrequencyOffset(0),
         m_lowpassFFT(nullptr),
         m_lowpassBufferIdx(0)
 {
+    (void)channelPower;
+
     resetMagLevels();
 
     applySettings(m_settings, QStringList(), true);
@@ -41,7 +42,6 @@ ChannelPowerSink::~ChannelPowerSink()
 void ChannelPowerSink::feed(const SampleVector::const_iterator& begin, const SampleVector::const_iterator& end)
 {
     QMutexLocker mutexLocker(&m_mutex);
-    Complex ci;
 
     for (SampleVector::const_iterator it = begin; it != end; ++it)
     {
diff --git a/plugins/channelrx/channelpower/channelpowersink.h b/plugins/channelrx/channelpower/channelpowersink.h
index 2bfa73714..3f276f293 100644
--- a/plugins/channelrx/channelpower/channelpowersink.h
+++ b/plugins/channelrx/channelpower/channelpowersink.h
@@ -65,7 +65,6 @@ public:
 
 private:
 
-    ChannelPower *m_channelPower;
     ChannelPowerSettings m_settings;
     ChannelAPI *m_channel;
     int m_channelSampleRate;
diff --git a/plugins/channelrx/demodadsb/adsbdemodgui.cpp b/plugins/channelrx/demodadsb/adsbdemodgui.cpp
index 342e8f5c8..646147b38 100644
--- a/plugins/channelrx/demodadsb/adsbdemodgui.cpp
+++ b/plugins/channelrx/demodadsb/adsbdemodgui.cpp
@@ -4991,7 +4991,7 @@ ADSBDemodGUI::ADSBDemodGUI(PluginAPI* pluginAPI, DeviceUISet *deviceUISet, Baseb
     m_azEl.setLocation(stationLatitude, stationLongitude, stationAltitude);
 
     // These are the default values in sdrbase/settings/preferences.cpp
-    if ((stationLatitude == 49.012423) && (stationLongitude == 8.418125)) {
+    if ((stationLatitude == (float)49.012423) && (stationLongitude == (float)8.418125)) {
         ui->warning->setText("Please set your antenna location under Preferences > My Position");
     }
 
diff --git a/plugins/channelrx/demodadsb/adsbdemodgui.h b/plugins/channelrx/demodadsb/adsbdemodgui.h
index a05e829bc..ebf257408 100644
--- a/plugins/channelrx/demodadsb/adsbdemodgui.h
+++ b/plugins/channelrx/demodadsb/adsbdemodgui.h
@@ -811,6 +811,10 @@ public:
     {
         m_aircraftRegExp.optimize();
     }
+    
+    virtual ~ModelMatch()
+    {
+    }
 
     virtual bool match(const QString &aircraft, const QString &manufacturer, QString &model)
     {
diff --git a/plugins/channelrx/demodadsb/adsbdemodsink.cpp b/plugins/channelrx/demodadsb/adsbdemodsink.cpp
index eeeaa15ab..6b9da6eae 100644
--- a/plugins/channelrx/demodadsb/adsbdemodsink.cpp
+++ b/plugins/channelrx/demodadsb/adsbdemodsink.cpp
@@ -79,7 +79,6 @@ void ADSBDemodSink::feed(const SampleVector::const_iterator& begin, const Sample
         for (SampleVector::const_iterator it = begin; it != end; ++it)
         {
             Complex c(it->real(), it->imag());
-            Complex ci;
             c *= m_nco.nextIQ();
             processOneSample(complexMagSq(c));
         }
diff --git a/plugins/channelrx/demodais/aisdemodsink.cpp b/plugins/channelrx/demodais/aisdemodsink.cpp
index a961201be..55dee3fa1 100644
--- a/plugins/channelrx/demodais/aisdemodsink.cpp
+++ b/plugins/channelrx/demodais/aisdemodsink.cpp
@@ -118,8 +118,6 @@ void AISDemodSink::feed(const SampleVector::const_iterator& begin, const SampleV
 
 void AISDemodSink::processOneSample(Complex &ci)
 {
-    Complex ca;
-
     // FM demodulation
     double magsqRaw;
     Real deviation;
diff --git a/plugins/channelrx/demodam/amdemodgui.cpp b/plugins/channelrx/demodam/amdemodgui.cpp
index 415a65f3e..2dc7e96c5 100644
--- a/plugins/channelrx/demodam/amdemodgui.cpp
+++ b/plugins/channelrx/demodam/amdemodgui.cpp
@@ -663,7 +663,7 @@ void AMDemodGUI::snapClicked()
     {
         applySnap();
 
-        qint64 value;
+        qint64 value = 0;
 
         if (m_settings.m_frequencyMode == AMDemodSettings::Offset) {
             value = m_settings.m_inputFrequencyOffset;
diff --git a/plugins/channelrx/demodapt/aptdemodsink.cpp b/plugins/channelrx/demodapt/aptdemodsink.cpp
index 13b41f798..87a156c5c 100644
--- a/plugins/channelrx/demodapt/aptdemodsink.cpp
+++ b/plugins/channelrx/demodapt/aptdemodsink.cpp
@@ -24,7 +24,6 @@
 #include "aptdemodsink.h"
 
 APTDemodSink::APTDemodSink(APTDemod *packetDemod) :
-        m_aptDemod(packetDemod),
         m_channelSampleRate(APTDEMOD_AUDIO_SAMPLE_RATE),
         m_channelFrequencyOffset(0),
         m_magsqSum(0.0f),
@@ -33,6 +32,8 @@ APTDemodSink::APTDemodSink(APTDemod *packetDemod) :
         m_imageWorkerMessageQueue(nullptr),
         m_samples(nullptr)
 {
+    (void)packetDemod;
+
     m_magsq = 0.0;
 
     applySettings(m_settings, true);
@@ -129,8 +130,6 @@ void APTDemodSink::feed(const SampleVector::const_iterator& begin, const SampleV
 
 void APTDemodSink::processOneSample(Complex &ci)
 {
-    Complex ca;
-
     // FM demodulation
     double magsqRaw;
     Real deviation;
diff --git a/plugins/channelrx/demodapt/aptdemodsink.h b/plugins/channelrx/demodapt/aptdemodsink.h
index e65f903e5..7a4f85d53 100644
--- a/plugins/channelrx/demodapt/aptdemodsink.h
+++ b/plugins/channelrx/demodapt/aptdemodsink.h
@@ -87,7 +87,6 @@ private:
         double m_magsqPeak;
     };
 
-    APTDemod *m_aptDemod;
     APTDemodSettings m_settings;
     int m_channelSampleRate;
     int m_channelFrequencyOffset;
diff --git a/plugins/channelrx/demodatv/atvdemodsettings.h b/plugins/channelrx/demodatv/atvdemodsettings.h
index f25df5b21..db428fddb 100644
--- a/plugins/channelrx/demodatv/atvdemodsettings.h
+++ b/plugins/channelrx/demodatv/atvdemodsettings.h
@@ -101,9 +101,6 @@ struct ATVDemodSettings
     static float getNominalLineTime(int nbLines, int fps);
     static float getRFBandwidthDivisor(ATVModulation modulation);
     static void getBaseValues(int sampleRate, int linesPerSecond, uint32_t& nbPointsPerLine);
-
-private:
-    int m_rfSliderDivisor;
 };
 
 #endif /* PLUGINS_CHANNELRX_DEMODATV_ATVDEMODSETTINGS_H_ */
diff --git a/plugins/channelrx/demodatv/atvdemodsink.h b/plugins/channelrx/demodatv/atvdemodsink.h
index a6b47f024..6af9b58df 100644
--- a/plugins/channelrx/demodatv/atvdemodsink.h
+++ b/plugins/channelrx/demodatv/atvdemodsink.h
@@ -163,7 +163,6 @@ private:
     int m_hSyncErrorCount;
 
     float prevSample;
-    int m_avgColIndex;
 
     SampleVector m_sampleBuffer;
 
diff --git a/plugins/channelrx/demodbfm/rdsparser.cpp b/plugins/channelrx/demodbfm/rdsparser.cpp
index 663d74a19..b02f8742b 100644
--- a/plugins/channelrx/demodbfm/rdsparser.cpp
+++ b/plugins/channelrx/demodbfm/rdsparser.cpp
@@ -467,7 +467,6 @@ void RDSParser::decode_type0(unsigned int *group, bool B)
 {
 	unsigned int af_code_1 = 0;
 	unsigned int af_code_2 = 0;
-	unsigned int  no_af    = 0;
 	double af_1            = 0;
 	double af_2            = 0;
 
@@ -534,7 +533,7 @@ void RDSParser::decode_type0(unsigned int *group, bool B)
             // @TODO: Find proper header or STL on OSX
 			auto res = m_g0_alt_freq.insert(af_1/1e3);
 			m_g0_af_updated = m_g0_af_updated || res.second;
-			no_af += 1;
+			// no_af += 1;
 		}
 
 		if (af_2)
@@ -542,7 +541,7 @@ void RDSParser::decode_type0(unsigned int *group, bool B)
             // @TODO: Find proper header or STL on OSX
             auto res = m_g0_alt_freq.insert(af_2/1e3);
             m_g0_af_updated = m_g0_af_updated || res.second;
-			no_af += 2;
+			// no_af += 2;
 		}
 
 		/*
diff --git a/plugins/channelrx/demoddab/dabdemodsink.cpp b/plugins/channelrx/demoddab/dabdemodsink.cpp
index 193d00dac..70a1f0b25 100644
--- a/plugins/channelrx/demoddab/dabdemodsink.cpp
+++ b/plugins/channelrx/demoddab/dabdemodsink.cpp
@@ -488,7 +488,6 @@ void DABDemodSink::processOneAudioSample(Complex &ci)
 }
 
 DABDemodSink::DABDemodSink(DABDemod *packetDemod) :
-        m_dabDemod(packetDemod),
         m_audioSampleRate(48000),
         m_dabAudioSampleRate(10000), // Unused value to begin with
         m_channelSampleRate(DABDEMOD_CHANNEL_SAMPLE_RATE),
@@ -500,6 +499,8 @@ DABDemodSink::DABDemodSink(DABDemod *packetDemod) :
         m_messageQueueToChannel(nullptr),
         m_audioFifo(48000)
 {
+    (void)packetDemod;
+
     m_audioBuffer.resize(1<<14);
     m_audioBufferFill = 0;
 
diff --git a/plugins/channelrx/demoddab/dabdemodsink.h b/plugins/channelrx/demoddab/dabdemodsink.h
index 7f133dea2..1dd975075 100644
--- a/plugins/channelrx/demoddab/dabdemodsink.h
+++ b/plugins/channelrx/demoddab/dabdemodsink.h
@@ -106,7 +106,6 @@ private:
         double m_magsqPeak;
     };
 
-    DABDemod *m_dabDemod;
     DABDemodSettings m_settings;
     ChannelAPI *m_channel;
 
diff --git a/plugins/channelrx/demoddatv/datvdemodsink.cpp b/plugins/channelrx/demoddatv/datvdemodsink.cpp
index 42e47170d..7328bdc8f 100644
--- a/plugins/channelrx/demoddatv/datvdemodsink.cpp
+++ b/plugins/channelrx/demoddatv/datvdemodsink.cpp
@@ -1096,12 +1096,12 @@ void DATVDemodSink::InitDATVS2Framework()
     p_vbitcount= new leansdr::pipebuf<int>(m_objScheduler, "Bits processed", BUF_S2PACKETS);
     p_verrcount = new leansdr::pipebuf<int>(m_objScheduler, "Bits corrected", BUF_S2PACKETS);
 
-    bool commandFileValid = false;
+    // bool commandFileValid = false;
 
     if (QFileInfo::exists(m_settings.m_softLDPCToolPath))
     {
         QFileInfo fileInfo = QFileInfo(m_settings.m_softLDPCToolPath);
-        commandFileValid = fileInfo.isExecutable();
+        // commandFileValid = fileInfo.isExecutable();
     }
 
     if (m_settings.m_softLDPC /*&& commandFileValid*/)
@@ -1195,11 +1195,6 @@ void DATVDemodSink::InitDATVS2Framework()
 
 void DATVDemodSink::feed(const SampleVector::const_iterator& begin, const SampleVector::const_iterator& end)
 {
-    float fltI;
-    float fltQ;
-    fftfilt::cmplx *objRF;
-    int intRFOut;
-    int lngWritable=0;
     leansdr::s2_frame_receiver<leansdr::f32, leansdr::llr_ss> *objDemodulatorDVBS2 =
         (leansdr::s2_frame_receiver<leansdr::f32, leansdr::llr_ss> *) m_objDemodulatorDVBS2;
 
diff --git a/plugins/channelrx/demoddatv/datvdemodsink.h b/plugins/channelrx/demoddatv/datvdemodsink.h
index 70af99272..b56cb6531 100644
--- a/plugins/channelrx/demoddatv/datvdemodsink.h
+++ b/plugins/channelrx/demoddatv/datvdemodsink.h
@@ -333,8 +333,8 @@ private:
     Interpolator m_interpolator;
     Real m_interpolatorDistance;
     Real m_interpolatorDistanceRemain;
-    static const int m_interpolatorPhaseSteps = 4;      // Higher than these two values will struggle to run in real-time
-    static const int m_interpolatorTapsPerPhase = 3.5f; // without gaining much improvement in PER
+    static constexpr int m_interpolatorPhaseSteps = 4;      // Higher than these two values will struggle to run in real-time
+    static constexpr float m_interpolatorTapsPerPhase = 3.5f; // without gaining much improvement in PER
 
     bool m_blnInitialized;
     bool m_blnRenderingVideo;
diff --git a/plugins/channelrx/demoddatv/leansdr/discrmath.h b/plugins/channelrx/demoddatv/leansdr/discrmath.h
index f4a0618da..de3835713 100644
--- a/plugins/channelrx/demoddatv/leansdr/discrmath.h
+++ b/plugins/channelrx/demoddatv/leansdr/discrmath.h
@@ -58,7 +58,7 @@ struct bitvect
         for (int i = 0; i < nw; ++i)
             v[i] = a.v[i];
         if (M < N)
-            for (int i = a.NW; i < NW; ++i)
+            for (size_t i = a.NW; i < NW; ++i)
                 v[i] = 0;
         if (M > N)
             truncate_to_N();
diff --git a/plugins/channelrx/demoddatv/leansdr/dvbs2.h b/plugins/channelrx/demoddatv/leansdr/dvbs2.h
index 47c2acf60..69ad0d315 100644
--- a/plugins/channelrx/demoddatv/leansdr/dvbs2.h
+++ b/plugins/channelrx/demoddatv/leansdr/dvbs2.h
@@ -458,6 +458,8 @@ struct s2_frame_transmitter : runnable
         std::complex<T> *pout
     )
     {
+        (void)mcinfo;
+        
         std::complex<T> *pout0 = pout; // For sanity check
         // PLHEADER: SOF AND PLSCODE
         // EN 302 307-1 section 5.5.2 PL signalling
@@ -2584,6 +2586,8 @@ struct s2_deinterleaver : runnable
     static inline void split_symbol(const llr_ss &ps,
                                     hard_sb accs[/*bps*/], int nacc)
     {
+        (void)nacc;
+        
         if (MSB_FIRST)
         {
             for (int b = 0; b < BPS; ++b) {
@@ -3833,10 +3837,6 @@ struct s2_fecdec_helper : runnable
     // Receive a finished job.
     void receive_frame(const helper_job *job)
     {
-        // Read corrected frame from helper
-        const s2_pls *pls = &job->pls;
-        int iosize = (pls->framebits() / 8) * sizeof(ldpc_buf[0]);
-
         // Non blocking read - will do the next time if no adata is available
         if (job->h->m_worker->dataAvailable())
         {
@@ -4267,7 +4267,6 @@ private:
                     // 188     =  waiting for CRC
     uint8_t leftover[188];
     static const int MAX_TS_PER_BBFRAME = fec_info::KBCH_MAX / 8 / 188 + 1;
-    bool locked;
     pipereader<bbframe> in;
     pipewriter<tspacket> out;
     int current_state;
diff --git a/plugins/channelrx/demoddatv/leansdr/generic.h b/plugins/channelrx/demoddatv/leansdr/generic.h
index 6c89701ac..893468ad8 100644
--- a/plugins/channelrx/demoddatv/leansdr/generic.h
+++ b/plugins/channelrx/demoddatv/leansdr/generic.h
@@ -544,6 +544,7 @@ struct serializer : runnable
         in(_in),
         out(_out, nout)
     {
+        (void)sch;
         if (nin * sizeof(Tin) != nout * sizeof(Tout)) {
             fail("serializer: incompatible sizes");
         }
diff --git a/plugins/channelrx/demoddatv/leansdr/sdr.h b/plugins/channelrx/demoddatv/leansdr/sdr.h
index 314f587c3..9ce9cdf5b 100644
--- a/plugins/channelrx/demoddatv/leansdr/sdr.h
+++ b/plugins/channelrx/demoddatv/leansdr/sdr.h
@@ -414,7 +414,6 @@ struct simple_agc : runnable
             float gain = estimated ? out_rms / sqrtf(estimated) : 0;
             pin = in.rd();
             std::complex<T> *pout = out.wr();
-            float bwcomp = 1 - bw;
 
             for (; pin < pend; ++pin, ++pout)
             {
diff --git a/plugins/channelrx/demoddsc/dscdemodgui.cpp b/plugins/channelrx/demoddsc/dscdemodgui.cpp
index cbade9cbd..ed7febbd3 100644
--- a/plugins/channelrx/demoddsc/dscdemodgui.cpp
+++ b/plugins/channelrx/demoddsc/dscdemodgui.cpp
@@ -767,7 +767,7 @@ void DSCDemodGUI::customContextMenuRequested(QPoint pos)
                     QAction* sendAreaToMapAction = new QAction(QString("Display %1 on map").arg(address), tableContextMenu);
                     connect(sendAreaToMapAction, &QAction::triggered, this, [this, name, address, info]()->void {
                         sendAreaToMapFeature(name, address, info);
-                        QTimer::singleShot(500, [this, name] {
+                        QTimer::singleShot(500, [ name] {
                             FeatureWebAPIUtils::mapFind(name);
                         });
                     });
@@ -776,7 +776,7 @@ void DSCDemodGUI::customContextMenuRequested(QPoint pos)
                 else
                 {
                     QAction* findAreaOnMapAction = new QAction(QString("Center map on %1").arg(address), tableContextMenu);
-                    connect(findAreaOnMapAction, &QAction::triggered, this, [this, name]()->void {
+                    connect(findAreaOnMapAction, &QAction::triggered, this, [ name]()->void {
                         FeatureWebAPIUtils::mapFind(name);
                     });
                     tableContextMenu->addAction(findAreaOnMapAction);
@@ -814,7 +814,7 @@ void DSCDemodGUI::customContextMenuRequested(QPoint pos)
                             if (sampleSource)
                             {
                                 QAction* tuneRxAction = new QAction(QString("Tune SSB Demod %1:%2 to %3").arg(deviceSetIndex).arg(chi).arg(rxFormatted), tableContextMenu);
-                                connect(tuneRxAction, &QAction::triggered, this, [this, deviceSetIndex, chi, rxFreq, sampleSource]()->void {
+                                connect(tuneRxAction, &QAction::triggered, this, [deviceSetIndex, chi, rxFreq, sampleSource]()->void {
 
                                     int bw = sampleSource->getSampleRate();
                                     quint64 cf = sampleSource->getCenterFrequency();
diff --git a/plugins/channelrx/demodendoftrain/endoftraindemodsink.cpp b/plugins/channelrx/demodendoftrain/endoftraindemodsink.cpp
index 079ff6b10..0bbea6d7f 100644
--- a/plugins/channelrx/demodendoftrain/endoftraindemodsink.cpp
+++ b/plugins/channelrx/demodendoftrain/endoftraindemodsink.cpp
@@ -119,8 +119,6 @@ void EndOfTrainDemodSink::feed(const SampleVector::const_iterator& begin, const
 
 void EndOfTrainDemodSink::processOneSample(Complex &ci)
 {
-    Complex ca;
-
     // FM demodulation
     double magsqRaw;
     Real deviation;
diff --git a/plugins/channelrx/demodft8/ft8demod.cpp b/plugins/channelrx/demodft8/ft8demod.cpp
index dccdd3c31..185f8d485 100644
--- a/plugins/channelrx/demodft8/ft8demod.cpp
+++ b/plugins/channelrx/demodft8/ft8demod.cpp
@@ -697,7 +697,7 @@ void FT8Demod::sendChannelSettings(
     const FT8DemodSettings& settings,
     bool force)
 {
-    qDebug("FT8Demod::sendChannelSettings: %d pipes", pipes.size());
+    qDebug("FT8Demod::sendChannelSettings: %d pipes", (int)pipes.size());
 
     for (const auto& pipe : pipes)
     {
diff --git a/plugins/channelrx/demodft8/ft8demodsettings.h b/plugins/channelrx/demodft8/ft8demodsettings.h
index 8e4146f30..25a113eb1 100644
--- a/plugins/channelrx/demodft8/ft8demodsettings.h
+++ b/plugins/channelrx/demodft8/ft8demodsettings.h
@@ -51,8 +51,9 @@ struct FT8DemodBandPreset
     int m_channelOffset;
 };
 
-struct FT8DemodSettings
+class FT8DemodSettings
 {
+public:
     enum MessageCol {
         MESSAGE_COL_UTC,
         MESSAGE_COL_TYPE,
diff --git a/plugins/channelrx/demodft8/ft8demodworker.cpp b/plugins/channelrx/demodft8/ft8demodworker.cpp
index 8b1b1d797..2d63f0ee8 100644
--- a/plugins/channelrx/demodft8/ft8demodworker.cpp
+++ b/plugins/channelrx/demodft8/ft8demodworker.cpp
@@ -40,7 +40,6 @@ FT8DemodWorker::FT8Callback::FT8Callback(
 ) :
     m_packing(packing),
     m_periodTS(periodTS),
-    m_baseFrequency(baseFrequency),
     m_name(name),
     m_validCallsigns(nullptr)
 {
@@ -226,7 +225,7 @@ void FT8DemodWorker::processBuffer(int16_t *buffer, QDateTime periodTS)
 
     m_ft8Decoder.wait(m_decoderTimeBudget + 1.0); // add one second to budget to force quit threads
     qDebug("FT8DemodWorker::processBuffer: done: at %6.3f %d messages",
-        m_baseFrequency / 1000000.0, ft8Callback.getReportMessage()->getFT8Messages().size());
+        m_baseFrequency / 1000000.0, (int)ft8Callback.getReportMessage()->getFT8Messages().size());
 
     if (m_reportingMessageQueue) {
         m_reportingMessageQueue->push(new MsgReportFT8Messages(*ft8Callback.getReportMessage()));
diff --git a/plugins/channelrx/demodft8/ft8demodworker.h b/plugins/channelrx/demodft8/ft8demodworker.h
index 95792646b..358f9e559 100644
--- a/plugins/channelrx/demodft8/ft8demodworker.h
+++ b/plugins/channelrx/demodft8/ft8demodworker.h
@@ -84,7 +84,6 @@ private:
         FT8::Packing& m_packing;
         MsgReportFT8Messages *m_msgReportFT8Messages;
         const QDateTime& m_periodTS;
-        qint64 m_baseFrequency;
         QString m_name;
         const QSet<QString> *m_validCallsigns;
     };
diff --git a/plugins/channelrx/demodils/ilsdemodgui.cpp b/plugins/channelrx/demodils/ilsdemodgui.cpp
index 4d8baac7c..a912f5609 100644
--- a/plugins/channelrx/demodils/ilsdemodgui.cpp
+++ b/plugins/channelrx/demodils/ilsdemodgui.cpp
@@ -1432,7 +1432,6 @@ void ILSDemodGUI::scanAvailableChannels()
     MessagePipes& messagePipes = mainCore->getMessagePipes();
     std::vector<DeviceSet*>& deviceSets = mainCore->getDeviceSets();
     m_availableChannels.clear();
-    int deviceSetIndex = 0;
 
     for (const auto& deviceSet : deviceSets)
     {
@@ -1465,7 +1464,6 @@ void ILSDemodGUI::scanAvailableChannels()
                 }
             }
         }
-        deviceSetIndex++;
     }
 }
 
diff --git a/plugins/channelrx/demodils/ilsdemodsink.cpp b/plugins/channelrx/demodils/ilsdemodsink.cpp
index 30243f831..8bd2f2d1c 100644
--- a/plugins/channelrx/demodils/ilsdemodsink.cpp
+++ b/plugins/channelrx/demodils/ilsdemodsink.cpp
@@ -31,7 +31,6 @@
 ILSDemodSink::ILSDemodSink(ILSDemod *ilsDemod) :
         m_spectrumSink(nullptr),
         m_scopeSink(nullptr),
-        m_ilsDemod(ilsDemod),
         m_channel(nullptr),
         m_channelSampleRate(ILSDemodSettings::ILSDEMOD_CHANNEL_SAMPLE_RATE),
         m_channelFrequencyOffset(0),
@@ -51,6 +50,8 @@ ILSDemodSink::ILSDemodSink(ILSDemod *ilsDemod) :
         m_audioFifo(48000),
         m_sampleBufferIndex(0)
 {
+	(void)ilsDemod;
+
 	m_audioBuffer.resize(1<<14);
 	m_audioBufferFill = 0;
 
diff --git a/plugins/channelrx/demodils/ilsdemodsink.h b/plugins/channelrx/demodils/ilsdemodsink.h
index 5e179d197..ebcef81f7 100644
--- a/plugins/channelrx/demodils/ilsdemodsink.h
+++ b/plugins/channelrx/demodils/ilsdemodsink.h
@@ -96,7 +96,6 @@ private:
 
 	SpectrumVis* m_spectrumSink;
     ScopeVis* m_scopeSink;    // Scope GUI to display baseband waveform
-    ILSDemod *m_ilsDemod;
     ILSDemodSettings m_settings;
     ChannelAPI *m_channel;
     int m_channelSampleRate;
diff --git a/plugins/channelrx/demodnavtex/navtexdemodsink.cpp b/plugins/channelrx/demodnavtex/navtexdemodsink.cpp
index f10c8e6ab..fb82db669 100644
--- a/plugins/channelrx/demodnavtex/navtexdemodsink.cpp
+++ b/plugins/channelrx/demodnavtex/navtexdemodsink.cpp
@@ -28,7 +28,6 @@
 #include "navtexdemodsink.h"
 
 NavtexDemodSink::NavtexDemodSink(NavtexDemod *packetDemod) :
-        m_navtexDemod(packetDemod),
         m_channelSampleRate(NavtexDemodSettings::NAVTEXDEMOD_CHANNEL_SAMPLE_RATE),
         m_channelFrequencyOffset(0),
         m_magsqSum(0.0f),
@@ -38,6 +37,7 @@ NavtexDemodSink::NavtexDemodSink(NavtexDemod *packetDemod) :
         m_exp(nullptr),
         m_sampleBufferIndex(0)
 {
+    (void)packetDemod;
     m_magsq = 0.0;
 
     m_sampleBuffer.resize(m_sampleBufferSize);
diff --git a/plugins/channelrx/demodnavtex/navtexdemodsink.h b/plugins/channelrx/demodnavtex/navtexdemodsink.h
index 4e243b681..8f3305dbf 100644
--- a/plugins/channelrx/demodnavtex/navtexdemodsink.h
+++ b/plugins/channelrx/demodnavtex/navtexdemodsink.h
@@ -83,7 +83,6 @@ private:
     };
 
     ScopeVis* m_scopeSink;    // Scope GUI to display baseband waveform
-    NavtexDemod *m_navtexDemod;
     NavtexDemodSettings m_settings;
     ChannelAPI *m_channel;
     int m_channelSampleRate;
diff --git a/plugins/channelrx/demodpacket/packetdemodsink.cpp b/plugins/channelrx/demodpacket/packetdemodsink.cpp
index 21a971a99..7aab705c9 100644
--- a/plugins/channelrx/demodpacket/packetdemodsink.cpp
+++ b/plugins/channelrx/demodpacket/packetdemodsink.cpp
@@ -88,8 +88,6 @@ void PacketDemodSink::feed(const SampleVector::const_iterator& begin, const Samp
 
 void PacketDemodSink::processOneSample(Complex &ci)
 {
-    Complex ca;
-
     // FM demodulation
     double magsqRaw;
     Real deviation;
diff --git a/plugins/channelrx/demodpager/pagerdemodsink.cpp b/plugins/channelrx/demodpager/pagerdemodsink.cpp
index 71cb3a62e..7bbd92587 100644
--- a/plugins/channelrx/demodpager/pagerdemodsink.cpp
+++ b/plugins/channelrx/demodpager/pagerdemodsink.cpp
@@ -30,7 +30,6 @@
 
 PagerDemodSink::PagerDemodSink(PagerDemod *pagerDemod) :
         m_scopeSink(nullptr),
-        m_pagerDemod(pagerDemod),
         m_channelSampleRate(PagerDemodSettings::m_channelSampleRate),
         m_channelFrequencyOffset(0),
         m_magsqSum(0.0f),
@@ -50,6 +49,8 @@ PagerDemodSink::PagerDemodSink(PagerDemod *pagerDemod) :
         m_addressValid(0),
         m_sampleBufferIndex(0)
 {
+    (void)pagerDemod;
+
     m_magsq = 0.0;
 
     m_demodBuffer.resize(1<<12);
diff --git a/plugins/channelrx/demodpager/pagerdemodsink.h b/plugins/channelrx/demodpager/pagerdemodsink.h
index 4a4f6a458..daee29625 100644
--- a/plugins/channelrx/demodpager/pagerdemodsink.h
+++ b/plugins/channelrx/demodpager/pagerdemodsink.h
@@ -88,7 +88,6 @@ private:
     };
 
     ScopeVis* m_scopeSink;              // Scope GUI to display debug waveforms
-    PagerDemod *m_pagerDemod;
     PagerDemodSettings m_settings;
     ChannelAPI *m_channel;
     int m_channelSampleRate;
diff --git a/plugins/channelrx/demodrtty/rttydemodsink.cpp b/plugins/channelrx/demodrtty/rttydemodsink.cpp
index f0864bcde..b39217296 100644
--- a/plugins/channelrx/demodrtty/rttydemodsink.cpp
+++ b/plugins/channelrx/demodrtty/rttydemodsink.cpp
@@ -29,7 +29,6 @@
 #include "rttydemodsink.h"
 
 RttyDemodSink::RttyDemodSink(RttyDemod *packetDemod) :
-        m_rttyDemod(packetDemod),
         m_channelSampleRate(RttyDemodSettings::RTTYDEMOD_CHANNEL_SAMPLE_RATE),
         m_channelFrequencyOffset(0),
         m_magsqSum(0.0f),
@@ -48,6 +47,8 @@ RttyDemodSink::RttyDemodSink(RttyDemod *packetDemod) :
         m_fftCounter(0),
         m_sampleBufferIndex(0)
 {
+    (void)packetDemod;
+
     m_magsq = 0.0;
 
     m_sampleBuffer.resize(m_sampleBufferSize);
diff --git a/plugins/channelrx/demodrtty/rttydemodsink.h b/plugins/channelrx/demodrtty/rttydemodsink.h
index 31b4f44e7..ed5089225 100644
--- a/plugins/channelrx/demodrtty/rttydemodsink.h
+++ b/plugins/channelrx/demodrtty/rttydemodsink.h
@@ -83,7 +83,6 @@ private:
     };
 
     ScopeVis* m_scopeSink;    // Scope GUI to display baseband waveform
-    RttyDemod *m_rttyDemod;
     RttyDemodSettings m_settings;
     ChannelAPI *m_channel;
     int m_channelSampleRate;
diff --git a/plugins/channelrx/demodssb/ssbdemod.cpp b/plugins/channelrx/demodssb/ssbdemod.cpp
index 2a5b445b2..e4eb998da 100644
--- a/plugins/channelrx/demodssb/ssbdemod.cpp
+++ b/plugins/channelrx/demodssb/ssbdemod.cpp
@@ -752,7 +752,7 @@ void SSBDemod::sendChannelSettings(
     const SSBDemodSettings& settings,
     bool force)
 {
-    qDebug("SSBDemod::sendChannelSettings: %d pipes", pipes.size());
+    qDebug("SSBDemod::sendChannelSettings: %d pipes", (int)pipes.size());
 
     for (const auto& pipe : pipes)
     {
diff --git a/plugins/channelrx/demodvor/vordemodsink.h b/plugins/channelrx/demodvor/vordemodsink.h
index 92319bd28..6257bb848 100644
--- a/plugins/channelrx/demodvor/vordemodsink.h
+++ b/plugins/channelrx/demodvor/vordemodsink.h
@@ -105,7 +105,6 @@ private:
     MagSqLevelsStore m_magSqLevelStore;
 
     MessageQueue *m_messageQueueToChannel;
-    MessageQueue *m_messageQueueToGUI;
 
     MovingAverageUtil<Real, double, 16> m_movingAverage;
     SimpleAGC<4800> m_volumeAGC;
diff --git a/plugins/channelrx/filesink/filesinksink.h b/plugins/channelrx/filesink/filesinksink.h
index d4a3777e9..529824c1e 100644
--- a/plugins/channelrx/filesink/filesinksink.h
+++ b/plugins/channelrx/filesink/filesinksink.h
@@ -73,7 +73,6 @@ private:
     unsigned int m_nbCaptures;
     SampleSimpleFifo m_preRecordBuffer;
     unsigned int m_preRecordFill;
-    float m_squelchLevel;
     SpectrumVis* m_spectrumSink;
     MessageQueue *m_msgQueueToGUI;
     bool m_recordEnabled;
diff --git a/plugins/channelrx/freqscanner/freqscanner.h b/plugins/channelrx/freqscanner/freqscanner.h
index a5ec4ff37..3d56c8bef 100644
--- a/plugins/channelrx/freqscanner/freqscanner.h
+++ b/plugins/channelrx/freqscanner/freqscanner.h
@@ -389,7 +389,6 @@ private:
     qint64 m_activeFrequency;
     QDateTime m_minFFTStartTime;
     int m_scannerSampleRate;
-    bool m_stepping;
     qint64 m_stepStartFrequency;
     qint64 m_stepStopFrequency;
     QList<MsgScanResult::ScanResult> m_scanResults;
diff --git a/plugins/channelrx/freqscanner/freqscannersink.cpp b/plugins/channelrx/freqscanner/freqscannersink.cpp
index e38999f5b..cd90b35e7 100644
--- a/plugins/channelrx/freqscanner/freqscannersink.cpp
+++ b/plugins/channelrx/freqscanner/freqscannersink.cpp
@@ -27,7 +27,6 @@
 #include "freqscannersink.h"
 
 FreqScannerSink::FreqScannerSink(FreqScanner *ilsDemod) :
-        m_freqScanner(ilsDemod),
         m_channel(nullptr),
         m_channelSampleRate(48000),
         m_channelFrequencyOffset(0),
@@ -41,6 +40,8 @@ FreqScannerSink::FreqScannerSink(FreqScanner *ilsDemod) :
         m_binsPerChannel(16),
         m_averageCount(0)
 {
+    (void)ilsDemod;
+   
     applySettings(m_settings, QStringList(), true);
     applyChannelSettings(m_channelSampleRate, m_channelFrequencyOffset, 16, 4, true);
 }
diff --git a/plugins/channelrx/freqscanner/freqscannersink.h b/plugins/channelrx/freqscanner/freqscannersink.h
index 1bff72143..dcf311145 100644
--- a/plugins/channelrx/freqscanner/freqscannersink.h
+++ b/plugins/channelrx/freqscanner/freqscannersink.h
@@ -50,7 +50,6 @@ public:
 
 private:
 
-    FreqScanner *m_freqScanner;
     FreqScannerSettings m_settings;
     ChannelAPI *m_channel;
     int m_channelSampleRate;
diff --git a/plugins/channelrx/heatmap/heatmapsink.cpp b/plugins/channelrx/heatmap/heatmapsink.cpp
index 6502b9fce..bccf2408c 100644
--- a/plugins/channelrx/heatmap/heatmapsink.cpp
+++ b/plugins/channelrx/heatmap/heatmapsink.cpp
@@ -26,7 +26,6 @@
 
 HeatMapSink::HeatMapSink(HeatMap *heatMap) :
         m_scopeSink(nullptr),
-        m_heatMap(heatMap),
         m_channelSampleRate(10000),
         m_channelFrequencyOffset(0),
         m_magsq(0.0),
@@ -37,6 +36,8 @@ HeatMapSink::HeatMapSink(HeatMap *heatMap) :
         m_sampleBufferSize(1000),
         m_sampleBufferIndex(0)
 {
+    (void)heatMap;
+
     resetMagLevels();
     m_sampleBuffer.resize(m_sampleBufferSize);
 
diff --git a/plugins/channelrx/heatmap/heatmapsink.h b/plugins/channelrx/heatmap/heatmapsink.h
index 02588db6d..e20e57a21 100644
--- a/plugins/channelrx/heatmap/heatmapsink.h
+++ b/plugins/channelrx/heatmap/heatmapsink.h
@@ -106,12 +106,10 @@ private:
     };
 
     ScopeVis* m_scopeSink;    // Scope GUI to display filtered power
-    HeatMap *m_heatMap;
     HeatMapSettings m_settings;
     ChannelAPI *m_channel;
     int m_channelSampleRate;
     int m_channelFrequencyOffset;
-    int m_sinkSampleRate;
 
     NCO m_nco;
     Interpolator m_interpolator;
diff --git a/plugins/channelrx/localsink/localsinksettings.cpp b/plugins/channelrx/localsink/localsinksettings.cpp
index b6dd3074c..1e019ffe4 100644
--- a/plugins/channelrx/localsink/localsinksettings.cpp
+++ b/plugins/channelrx/localsink/localsinksettings.cpp
@@ -53,6 +53,7 @@ void LocalSinkSettings::resetToDefaults()
     m_reverseAPIChannelIndex = 0;
     m_workspaceIndex = 0;
     m_hidden = false;
+    m_maxFFTBands = 32;
 }
 
 QByteArray LocalSinkSettings::serialize() const
@@ -94,7 +95,7 @@ QByteArray LocalSinkSettings::serialize() const
     s.writeBool(24, m_reverseFilter);
 
     s.writeU32(99, m_fftBands.size());
-    int i = 0;
+    uint32_t i = 0;
 
     for (auto fftBand : m_fftBands)
     {
diff --git a/plugins/channelrx/localsink/localsinksettings.h b/plugins/channelrx/localsink/localsinksettings.h
index db0af6a70..990492144 100644
--- a/plugins/channelrx/localsink/localsinksettings.h
+++ b/plugins/channelrx/localsink/localsinksettings.h
@@ -42,7 +42,7 @@ struct LocalSinkSettings
     uint32_t m_log2FFT;
     FFTWindow::Function m_fftWindow;
     bool m_reverseFilter;
-    static const uint32_t m_maxFFTBands = 20;
+    uint32_t m_maxFFTBands;
     std::vector<std::pair<float, float>> m_fftBands;
     int m_streamIndex; //!< MIMO channel. Not relevant when connected to SI (single Rx).
     bool m_useReverseAPI;
diff --git a/plugins/channelrx/noisefigure/noisefiguresink.cpp b/plugins/channelrx/noisefigure/noisefiguresink.cpp
index 72d7b348c..62a381032 100644
--- a/plugins/channelrx/noisefigure/noisefiguresink.cpp
+++ b/plugins/channelrx/noisefigure/noisefiguresink.cpp
@@ -26,7 +26,6 @@
 #include "noisefiguresink.h"
 
 NoiseFigureSink::NoiseFigureSink(NoiseFigure *noiseFigure) :
-        m_noiseFigure(noiseFigure),
         m_channelSampleRate(48000),
         m_fftSequence(-1),
         m_fft(nullptr),
@@ -39,6 +38,8 @@ NoiseFigureSink::NoiseFigureSink(NoiseFigure *noiseFigure) :
         m_count(0),
         m_enabled(false)
 {
+    (void)noiseFigure;
+
     m_magsq = 0.0;
 
     applySettings(m_settings, true);
diff --git a/plugins/channelrx/noisefigure/noisefiguresink.h b/plugins/channelrx/noisefigure/noisefiguresink.h
index 2bf11bb0f..007a1fbe7 100644
--- a/plugins/channelrx/noisefigure/noisefiguresink.h
+++ b/plugins/channelrx/noisefigure/noisefiguresink.h
@@ -81,7 +81,6 @@ private:
         double m_magsqPeak;
     };
 
-    NoiseFigure *m_noiseFigure;
     NoiseFigureSettings m_settings;
     ChannelAPI *m_channel;
     int m_channelSampleRate;
diff --git a/plugins/channelrx/radioastronomy/radioastronomygui.cpp b/plugins/channelrx/radioastronomy/radioastronomygui.cpp
index 185bfd384..9c7192100 100644
--- a/plugins/channelrx/radioastronomy/radioastronomygui.cpp
+++ b/plugins/channelrx/radioastronomy/radioastronomygui.cpp
@@ -378,7 +378,7 @@ void RadioAstronomyGUI::addToPowerSeries(FFTMeasurement *fft, bool skipCalcs)
         && !((m_settings.m_powerYUnits == RadioAstronomySettings::PY_DBM) && (fft->m_tSys == 0.0f))  // dBm value not valid if temp is 0
        )
     {
-        qreal power;
+        qreal power = 0.0;
         switch (m_settings.m_powerYData)
         {
         case RadioAstronomySettings::PY_POWER:
diff --git a/plugins/channelrx/radioclock/radioclocksink.cpp b/plugins/channelrx/radioclock/radioclocksink.cpp
index 5b449c43b..9598249aa 100644
--- a/plugins/channelrx/radioclock/radioclocksink.cpp
+++ b/plugins/channelrx/radioclock/radioclocksink.cpp
@@ -28,7 +28,6 @@
 
 RadioClockSink::RadioClockSink(RadioClock *radioClock) :
         m_scopeSink(nullptr),
-        m_radioClock(radioClock),
         m_channelSampleRate(RadioClockSettings::RADIOCLOCK_CHANNEL_SAMPLE_RATE),
         m_channelFrequencyOffset(0),
         m_magsq(0.0),
@@ -49,6 +48,8 @@ RadioClockSink::RadioClockSink(RadioClock *radioClock) :
         m_sampleBufferIndex(0),
         m_gotMarker(false)
 {
+    (void)radioClock;
+   
     m_phaseDiscri.setFMScaling(RadioClockSettings::RADIOCLOCK_CHANNEL_SAMPLE_RATE / (2.0f * 20.0/M_PI));
     applySettings(m_settings, true);
     applyChannelSettings(m_channelSampleRate, m_channelFrequencyOffset, true);
diff --git a/plugins/channelrx/radioclock/radioclocksink.h b/plugins/channelrx/radioclock/radioclocksink.h
index bbd18d39a..58fe8809a 100644
--- a/plugins/channelrx/radioclock/radioclocksink.h
+++ b/plugins/channelrx/radioclock/radioclocksink.h
@@ -86,7 +86,6 @@ private:
     };
 
     ScopeVis* m_scopeSink;    // Scope GUI to display debug waveforms
-    RadioClock *m_radioClock;
     RadioClockSettings m_settings;
     ChannelAPI *m_channel;
     int m_channelSampleRate;
diff --git a/plugins/channelrx/remotesink/remotesink.h b/plugins/channelrx/remotesink/remotesink.h
index 4fbc49e4d..5c4d2cdf1 100644
--- a/plugins/channelrx/remotesink/remotesink.h
+++ b/plugins/channelrx/remotesink/remotesink.h
@@ -132,7 +132,6 @@ private:
     bool m_running;
     RemoteSinkSettings m_settings;
 
-    uint64_t m_centerFrequency;
     int64_t m_frequencyOffset;
     int m_basebandSampleRate;
 
diff --git a/plugins/channelrx/remotetcpsink/remotetcpsink.h b/plugins/channelrx/remotetcpsink/remotetcpsink.h
index 4b5cf1108..9533053d3 100644
--- a/plugins/channelrx/remotetcpsink/remotetcpsink.h
+++ b/plugins/channelrx/remotetcpsink/remotetcpsink.h
@@ -178,7 +178,6 @@ private:
     RemoteTCPSinkBaseband *m_basebandSink;
     RemoteTCPSinkSettings m_settings;
 
-    uint64_t m_centerFrequency;
     int m_basebandSampleRate;
 
     QNetworkAccessManager *m_networkManager;
diff --git a/plugins/channelrx/remotetcpsink/remotetcpsinkgui.cpp b/plugins/channelrx/remotetcpsink/remotetcpsinkgui.cpp
index 17c1fde3f..5da31d488 100644
--- a/plugins/channelrx/remotetcpsink/remotetcpsinkgui.cpp
+++ b/plugins/channelrx/remotetcpsink/remotetcpsinkgui.cpp
@@ -88,13 +88,13 @@ QString RemoteTCPSinkGUI::displayScaledF(float value, char type, int precision,
     }
     else
     {
-        if (posValue < 1000) {
+        if (posValue < 1000.0f) {
             return tr("%1").arg(QString::number(value, type, precision));
-        } else if (posValue < 1000000) {
+        } else if (posValue < 1000000.0f) {
             return tr("%1%2").arg(QString::number(value / 1000.0, type, precision)).arg(showMult ? "k" : "");
-        } else if (posValue < 1000000000) {
+        } else if (posValue < 1000000000.0f) {
             return tr("%1%2").arg(QString::number(value / 1000000.0, type, precision)).arg(showMult ? "M" : "");
-        } else if (posValue < 1000000000000) {
+        } else if (posValue < 1000000000000.0f) {
             return tr("%1%2").arg(QString::number(value / 1000000000.0, type, precision)).arg(showMult ? "G" : "");
         } else {
             return tr("%1").arg(QString::number(value, 'e', precision));
diff --git a/plugins/channelrx/sigmffilesink/sigmffilesinksink.h b/plugins/channelrx/sigmffilesink/sigmffilesinksink.h
index 444b5577a..e0675deaf 100644
--- a/plugins/channelrx/sigmffilesink/sigmffilesinksink.h
+++ b/plugins/channelrx/sigmffilesink/sigmffilesinksink.h
@@ -71,7 +71,6 @@ private:
     SigMFFileRecord m_fileSink;
     SampleSimpleFifo m_preRecordBuffer;
     unsigned int m_preRecordFill;
-    float m_squelchLevel;
     SpectrumVis* m_spectrumSink;
     MessageQueue *m_msgQueueToGUI;
     bool m_recordEnabled;
diff --git a/plugins/channeltx/filesource/filesource.cpp b/plugins/channeltx/filesource/filesource.cpp
index 846e07251..9ee6e78e6 100644
--- a/plugins/channeltx/filesource/filesource.cpp
+++ b/plugins/channeltx/filesource/filesource.cpp
@@ -54,8 +54,7 @@ FileSource::FileSource(DeviceAPI *deviceAPI) :
     ChannelAPI(m_channelIdURI, ChannelAPI::StreamSingleSource),
     m_deviceAPI(deviceAPI),
 	m_frequencyOffset(0),
-	m_basebandSampleRate(0),
-    m_linearGain(0.0)
+	m_basebandSampleRate(0)
 {
     setObjectName(m_channelId);
 
diff --git a/plugins/channeltx/filesource/filesource.h b/plugins/channeltx/filesource/filesource.h
index bf89c4b69..c9d9cf6ef 100644
--- a/plugins/channeltx/filesource/filesource.h
+++ b/plugins/channeltx/filesource/filesource.h
@@ -235,7 +235,6 @@ private:
     QRecursiveMutex m_settingsMutex;
     uint64_t m_frequencyOffset;
     uint32_t m_basebandSampleRate;
-    double m_linearGain;
 
     QNetworkAccessManager *m_networkManager;
     QNetworkRequest m_networkRequest;
diff --git a/plugins/channeltx/filesource/filesourcesource.cpp b/plugins/channeltx/filesource/filesourcesource.cpp
index c0fe28f76..11d85ca18 100644
--- a/plugins/channeltx/filesource/filesourcesource.cpp
+++ b/plugins/channeltx/filesource/filesourcesource.cpp
@@ -37,11 +37,9 @@ FileSourceSource::FileSourceSource() :
 	m_fileName("..."),
 	m_sampleSize(0),
 	m_centerFrequency(0),
-    m_frequencyOffset(0),
     m_fileSampleRate(0),
     m_samplesCount(0),
 	m_sampleRate(0),
-    m_deviceSampleRate(0),
 	m_recordLengthMuSec(0),
     m_startingTimeStamp(0),
     m_running(false),
diff --git a/plugins/channeltx/filesource/filesourcesource.h b/plugins/channeltx/filesource/filesourcesource.h
index 27801820c..c6ba48392 100644
--- a/plugins/channeltx/filesource/filesourcesource.h
+++ b/plugins/channeltx/filesource/filesourcesource.h
@@ -92,19 +92,15 @@ private:
         double m_magsqPeak;
     };
 
-    int m_channelSampleRate;
-    int m_channelFrequencyOffset;
     FileSourceSettings m_settings;
 
 	std::ifstream m_ifstream;
 	QString m_fileName;
 	quint32 m_sampleSize;
 	quint64 m_centerFrequency;
-    int64_t m_frequencyOffset;
     uint32_t m_fileSampleRate;
     quint64 m_samplesCount;
     uint32_t m_sampleRate;
-    uint32_t m_deviceSampleRate;
     quint64 m_recordLengthMuSec; //!< record length in microseconds computed from file size
     quint64 m_startingTimeStamp;
 	QTimer m_masterTimer;
diff --git a/plugins/channeltx/moddatv/dvb-s2/DVB2.cpp b/plugins/channeltx/moddatv/dvb-s2/DVB2.cpp
index bf12f2a3e..66b7c12ae 100644
--- a/plugins/channeltx/moddatv/dvb-s2/DVB2.cpp
+++ b/plugins/channeltx/moddatv/dvb-s2/DVB2.cpp
@@ -273,8 +273,6 @@ int DVB2::next_ts_frame_base( u8 *ts )
 }
 DVB2::DVB2(void)
 {
-    // Clear the transport queue
-    m_tp_q.empty();
     init_bb_randomiser();
     bch_poly_build_tables();
     build_crc8_table();
diff --git a/plugins/channeltx/modm17/m17modsource.cpp b/plugins/channeltx/modm17/m17modsource.cpp
index 2146d0de0..db223cb76 100644
--- a/plugins/channeltx/modm17/m17modsource.cpp
+++ b/plugins/channeltx/modm17/m17modsource.cpp
@@ -130,7 +130,7 @@ void M17ModSource::pullOne(Sample& sample)
 
 void M17ModSource::prefetch(unsigned int nbSamples)
 {
-    if ((m_settings.m_m17Mode == M17ModSettings::M17ModeFMAudio))
+    if (m_settings.m_m17Mode == M17ModSettings::M17ModeFMAudio)
     {
         unsigned int nbSamplesAudio = nbSamples * ((Real) m_audioSampleRate / (Real) m_channelSampleRate);
         pullAudio(nbSamplesAudio);
diff --git a/plugins/channeltx/modnfm/nfmmoddcs.h b/plugins/channeltx/modnfm/nfmmoddcs.h
index a7934aeb7..1b43095ac 100644
--- a/plugins/channeltx/modnfm/nfmmoddcs.h
+++ b/plugins/channeltx/modnfm/nfmmoddcs.h
@@ -33,7 +33,6 @@ public:
     int next(); //!< +1/-1 sample
 
 private:
-    int m_shift; //!< current frequency shift: -1 or 1
     int m_dcsWord[23]; //!< current DCS word in transmit order including parity and filler 11 + 3 + 9
     float m_step;
     bool m_positive;
diff --git a/plugins/channeltx/modpacket/packetmod.cpp b/plugins/channeltx/modpacket/packetmod.cpp
index 4e25fbf6f..5abc2b3ed 100644
--- a/plugins/channeltx/modpacket/packetmod.cpp
+++ b/plugins/channeltx/modpacket/packetmod.cpp
@@ -59,7 +59,6 @@ PacketMod::PacketMod(DeviceAPI *deviceAPI) :
     ChannelAPI(m_channelIdURI, ChannelAPI::StreamSingleSource),
     m_deviceAPI(deviceAPI),
     m_spectrumVis(SDR_TX_SCALEF),
-    m_sampleRate(48000),
     m_udpSocket(nullptr)
 {
     setObjectName(m_channelId);
diff --git a/plugins/channeltx/modpacket/packetmod.h b/plugins/channeltx/modpacket/packetmod.h
index 66bb7c4ee..74783e636 100644
--- a/plugins/channeltx/modpacket/packetmod.h
+++ b/plugins/channeltx/modpacket/packetmod.h
@@ -229,8 +229,6 @@ private:
     SampleVector m_sampleBuffer;
     QRecursiveMutex m_settingsMutex;
 
-    int m_sampleRate;
-
     QNetworkAccessManager *m_networkManager;
     QNetworkRequest m_networkRequest;
     QUdpSocket *m_udpSocket;
diff --git a/plugins/channeltx/modpsk31/psk31mod.cpp b/plugins/channeltx/modpsk31/psk31mod.cpp
index 29538ced3..9e691a131 100644
--- a/plugins/channeltx/modpsk31/psk31mod.cpp
+++ b/plugins/channeltx/modpsk31/psk31mod.cpp
@@ -55,7 +55,6 @@ PSK31::PSK31(DeviceAPI *deviceAPI) :
     ChannelAPI(m_channelIdURI, ChannelAPI::StreamSingleSource),
     m_deviceAPI(deviceAPI),
     m_spectrumVis(SDR_TX_SCALEF),
-    m_sampleRate(48000),
     m_udpSocket(nullptr)
 {
     setObjectName(m_channelId);
diff --git a/plugins/channeltx/modpsk31/psk31mod.h b/plugins/channeltx/modpsk31/psk31mod.h
index 4b217ab88..fe149ea1d 100644
--- a/plugins/channeltx/modpsk31/psk31mod.h
+++ b/plugins/channeltx/modpsk31/psk31mod.h
@@ -214,8 +214,6 @@ private:
     SampleVector m_sampleBuffer;
     QRecursiveMutex m_settingsMutex;
 
-    int m_sampleRate;
-
     QNetworkAccessManager *m_networkManager;
     QNetworkRequest m_networkRequest;
     QUdpSocket *m_udpSocket;
diff --git a/plugins/channeltx/modrtty/rttymod.cpp b/plugins/channeltx/modrtty/rttymod.cpp
index 140d62728..b22d30773 100644
--- a/plugins/channeltx/modrtty/rttymod.cpp
+++ b/plugins/channeltx/modrtty/rttymod.cpp
@@ -55,7 +55,6 @@ RttyMod::RttyMod(DeviceAPI *deviceAPI) :
     ChannelAPI(m_channelIdURI, ChannelAPI::StreamSingleSource),
     m_deviceAPI(deviceAPI),
     m_spectrumVis(SDR_TX_SCALEF),
-    m_sampleRate(48000),
     m_udpSocket(nullptr)
 {
     setObjectName(m_channelId);
diff --git a/plugins/channeltx/modrtty/rttymod.h b/plugins/channeltx/modrtty/rttymod.h
index ea332c678..5fbadb76a 100644
--- a/plugins/channeltx/modrtty/rttymod.h
+++ b/plugins/channeltx/modrtty/rttymod.h
@@ -214,8 +214,6 @@ private:
     SampleVector m_sampleBuffer;
     QRecursiveMutex m_settingsMutex;
 
-    int m_sampleRate;
-
     QNetworkAccessManager *m_networkManager;
     QNetworkRequest m_networkRequest;
     QUdpSocket *m_udpSocket;
diff --git a/plugins/feature/gs232controller/inputcontroller.cpp b/plugins/feature/gs232controller/inputcontroller.cpp
index 102900988..07269e8ca 100644
--- a/plugins/feature/gs232controller/inputcontroller.cpp
+++ b/plugins/feature/gs232controller/inputcontroller.cpp
@@ -60,6 +60,7 @@ InputController* InputControllerManager::open(const QString& name)
 #ifdef QT_GAMEPAD_FOUND
     return GamepadInputController::open(name);
 #else
+    (void)name;
     return nullptr;
 #endif
 }
diff --git a/plugins/feature/map/mapgui.cpp b/plugins/feature/map/mapgui.cpp
index 8714b4884..b62565cdd 100644
--- a/plugins/feature/map/mapgui.cpp
+++ b/plugins/feature/map/mapgui.cpp
@@ -1824,6 +1824,7 @@ void MapGUI::applyMap3DSettings(bool reloadMap)
     m_imageMapModel.allUpdated();
     m_polygonMapModel.allUpdated();
     m_polylineMapModel.allUpdated();
+    (void)reloadMap;
 #endif
 }
 
diff --git a/plugins/feature/startracker/startracker.cpp b/plugins/feature/startracker/startracker.cpp
index d7a156a27..1f33d784a 100644
--- a/plugins/feature/startracker/startracker.cpp
+++ b/plugins/feature/startracker/startracker.cpp
@@ -695,7 +695,6 @@ double StarTracker::applyBeam(const FITS *fits, double beamwidth, double ra, dou
         numberOfCoeffsV++;
     }
     double *beam = new double[numberOfCoeffsH*numberOfCoeffsV];
-    double sum = 0.0;
     int y0 = numberOfCoeffsV/2;
     int x0 =  numberOfCoeffsH/2;
     int nonZeroCount = 0;
@@ -709,7 +708,6 @@ double StarTracker::applyBeam(const FITS *fits, double beamwidth, double ra, dou
             if (r < halfBeamwidth)
             {
                 beam[y*numberOfCoeffsH+x] = pow(cos(Units::degreesToRadians(r)), p);
-                sum += beam[y*numberOfCoeffsH+x];
                 nonZeroCount++;
             }
             else
diff --git a/plugins/samplemimo/audiocatsiso/audiocatsisosettings.h b/plugins/samplemimo/audiocatsiso/audiocatsisosettings.h
index 10e55689c..d93b6d368 100644
--- a/plugins/samplemimo/audiocatsiso/audiocatsisosettings.h
+++ b/plugins/samplemimo/audiocatsiso/audiocatsisosettings.h
@@ -25,7 +25,8 @@
 #include "audio/audiodeviceinfo.h"
 #include "util/message.h"
 
-struct AudioCATSISOSettings {
+class AudioCATSISOSettings{
+public:
 
     class MsgPTT : public Message {
         MESSAGE_CLASS_DECLARATION
diff --git a/plugins/samplemimo/metismiso/metismisoudphandler.cpp b/plugins/samplemimo/metismiso/metismisoudphandler.cpp
index 3b8741207..0beb168fb 100644
--- a/plugins/samplemimo/metismiso/metismisoudphandler.cpp
+++ b/plugins/samplemimo/metismiso/metismisoudphandler.cpp
@@ -483,7 +483,7 @@ void MetisMISOUDPHandler::processIQBuffer(unsigned char* buffer)
 {
     int b = 0;
     unsigned int r;
-    int sampleI, sampleQ, sampleMic;
+    int sampleI, sampleQ;
 
 
     if (buffer[b++]==0x7F && buffer[b++]==0x7F && buffer[b++]==0x7F)
@@ -622,8 +622,9 @@ void MetisMISOUDPHandler::processIQBuffer(unsigned char* buffer)
                 }
             }
 
-            sampleMic  = (int)((signed char) buffer[b++]) << 8;
-            sampleMic += (int)((unsigned char)buffer[b++]);
+            // sampleMic
+            b+=2;
+
             m_sampleTxCount++;
 
             if (m_sampleTxCount >= 63) // 63 samples per 512 byte Tx block
diff --git a/plugins/samplesink/remoteoutput/remoteoutputworker.cpp b/plugins/samplesink/remoteoutput/remoteoutputworker.cpp
index 5dab5876c..e2db10fbf 100644
--- a/plugins/samplesink/remoteoutput/remoteoutputworker.cpp
+++ b/plugins/samplesink/remoteoutput/remoteoutputworker.cpp
@@ -116,8 +116,6 @@ void RemoteOutputWorker::tick()
             m_throttleToggle = !m_throttleToggle;
         }
 
-        SampleVector::iterator readUntil;
-
         SampleVector& data = m_sampleFifo->getData();
         unsigned int iPart1Begin, iPart1End, iPart2Begin, iPart2End;
         m_sampleFifo->read(m_samplesChunkSize, iPart1Begin, iPart1End, iPart2Begin, iPart2End);
diff --git a/plugins/samplesource/androidsdrdriverinput/androidsdrdriverinput.cpp b/plugins/samplesource/androidsdrdriverinput/androidsdrdriverinput.cpp
index 350e4ac54..f14b5b882 100644
--- a/plugins/samplesource/androidsdrdriverinput/androidsdrdriverinput.cpp
+++ b/plugins/samplesource/androidsdrdriverinput/androidsdrdriverinput.cpp
@@ -35,6 +35,9 @@
 
 #include "androidsdrdriverinput.h"
 #include "androidsdrdriverinputtcphandler.h"
+#ifdef ANDROID
+#include "util/android.h"
+#endif
 
 MESSAGE_CLASS_DEFINITION(AndroidSDRDriverInput::MsgConfigureAndroidSDRDriverInput, Message)
 MESSAGE_CLASS_DEFINITION(AndroidSDRDriverInput::MsgStartStop, Message)
diff --git a/plugins/samplesource/androidsdrdriverinput/androidsdrdriverinputtcphandler.h b/plugins/samplesource/androidsdrdriverinput/androidsdrdriverinputtcphandler.h
index 4a65fc9eb..b856f2d28 100644
--- a/plugins/samplesource/androidsdrdriverinput/androidsdrdriverinputtcphandler.h
+++ b/plugins/samplesource/androidsdrdriverinput/androidsdrdriverinputtcphandler.h
@@ -27,6 +27,7 @@
 #include <QDateTime>
 
 #include "util/messagequeue.h"
+#include "util/message.h"
 #include "androidsdrdriverinputsettings.h"
 #include "../../channelrx/remotetcpsink/remotetcpprotocol.h"
 
diff --git a/plugins/samplesource/fcdproplus/fcdproplusplugin.cpp b/plugins/samplesource/fcdproplus/fcdproplusplugin.cpp
index 37c71cc12..77381bf1d 100644
--- a/plugins/samplesource/fcdproplus/fcdproplusplugin.cpp
+++ b/plugins/samplesource/fcdproplus/fcdproplusplugin.cpp
@@ -40,8 +40,6 @@ const PluginDescriptor FCDProPlusPlugin::m_pluginDescriptor = {
 	QStringLiteral("https://github.com/f4exb/sdrangel")
 };
 
-static constexpr const char* const m_deviceTypeID = FCDPROPLUS_DEVICE_TYPE_ID;
-
 FCDProPlusPlugin::FCDProPlusPlugin(QObject* parent) :
 	QObject(parent)
 {
diff --git a/plugins/samplesource/fileinput/fileinputworker.h b/plugins/samplesource/fileinput/fileinputworker.h
index 6e9cb4a33..985f1803c 100644
--- a/plugins/samplesource/fileinput/fileinputworker.h
+++ b/plugins/samplesource/fileinput/fileinputworker.h
@@ -27,6 +27,9 @@
 #include <iostream>
 #include <fstream>
 #include <cstdlib>
+#ifdef ANDROID
+#include <QFile>
+#endif
 
 #include "util/message.h"
 
diff --git a/plugins/samplesource/sigmffileinput/sigmffiledata.h b/plugins/samplesource/sigmffileinput/sigmffiledata.h
index 5d0c2495d..bc4fccd6b 100644
--- a/plugins/samplesource/sigmffileinput/sigmffiledata.h
+++ b/plugins/samplesource/sigmffileinput/sigmffiledata.h
@@ -64,8 +64,9 @@ struct SigMFFileDataType
     }
 };
 
-struct SigMFFileMetaInfo
+class SigMFFileMetaInfo
 {
+public:
     // core
     QString m_dataTypeStr;
     SigMFFileDataType m_dataType;
@@ -153,8 +154,9 @@ struct SigMFFileMetaInfo
     }
 };
 
-struct SigMFFileCapture
+class SigMFFileCapture
 {
+public:
     uint64_t m_tsms;            //!< Unix timestamp in milliseconds
     uint64_t m_centerFrequency; //!< Center frequency in Hz
     uint64_t m_sampleStart;     //!< Sample index at which capture start
diff --git a/plugins/samplesource/sigmffileinput/sigmffileinputworker.cpp b/plugins/samplesource/sigmffileinput/sigmffileinputworker.cpp
index e04a708ea..ae8225c12 100644
--- a/plugins/samplesource/sigmffileinput/sigmffileinputworker.cpp
+++ b/plugins/samplesource/sigmffileinput/sigmffileinputworker.cpp
@@ -625,8 +625,8 @@ void SigMFFileInputWorker::writeToSampleFifoBAK(const quint8* buf, qint32 nbByte
                 nbSamples = nbBytes / (2 * m_samplebytes);
                 for (int is = 0; is < nbSamples; is++)
                 {
-                    convertBuf[2*is]   = fileBuf[2*is] >> (SDR_RX_SAMP_SZ == 24) ? 8 : 16;
-                    convertBuf[2*is+1] = fileBuf[2*is+1] >> (SDR_RX_SAMP_SZ == 24) ? 8 : 16;
+                    convertBuf[2*is]   = fileBuf[2*is] >> ((SDR_RX_SAMP_SZ == 24) ? 8 : 16);
+                    convertBuf[2*is+1] = fileBuf[2*is+1] >> ((SDR_RX_SAMP_SZ == 24) ? 8 : 16);
                 }
             }
             else
@@ -634,7 +634,7 @@ void SigMFFileInputWorker::writeToSampleFifoBAK(const quint8* buf, qint32 nbByte
                 nbSamples = nbBytes / m_samplebytes;
                 for (int is = 0; is < nbSamples; is++)
                 {
-                    convertBuf[2*is]   = fileBuf[is] >> (SDR_RX_SAMP_SZ == 24) ? 8 : 16;
+                    convertBuf[2*is]   = fileBuf[is] >> ((SDR_RX_SAMP_SZ == 24) ? 8 : 16);
                     convertBuf[2*is+1] = 0;
                 }
             }
@@ -715,9 +715,9 @@ void SigMFFileInputWorker::writeToSampleFifoBAK(const quint8* buf, qint32 nbByte
                 nbSamples = nbBytes / (2 * m_samplebytes);
                 for (int is = 0; is < nbSamples; is++)
                 {
-                    convertBuf[2*is] = (fileBuf[2*is] >> (SDR_RX_SAMP_SZ == 24) ? 8 : 16)
+                    convertBuf[2*is] = (fileBuf[2*is] >> ((SDR_RX_SAMP_SZ == 24) ? 8 : 16))
                         - ((SDR_RX_SAMP_SZ == 24) ? (1<<23) : (1<<15));
-                    convertBuf[2*is+1] = (fileBuf[2*is+1] >> (SDR_RX_SAMP_SZ == 24) ? 8 : 16)
+                    convertBuf[2*is+1] = (fileBuf[2*is+1] >> ((SDR_RX_SAMP_SZ == 24) ? 8 : 16))
                         - ((SDR_RX_SAMP_SZ == 24) ? (1<<23) : (1<<15));;
                 }
             }
@@ -726,7 +726,7 @@ void SigMFFileInputWorker::writeToSampleFifoBAK(const quint8* buf, qint32 nbByte
                 nbSamples = nbBytes / m_samplebytes;
                 for (int is = 0; is < nbSamples; is++)
                 {
-                    convertBuf[2*is] = (fileBuf[is] >> (SDR_RX_SAMP_SZ == 24) ? 8 : 16)
+                    convertBuf[2*is] = (fileBuf[is] >> ((SDR_RX_SAMP_SZ == 24) ? 8 : 16))
                         - ((SDR_RX_SAMP_SZ == 24) ? (1<<23) : (1<<15));
                     convertBuf[2*is+1] = 0;
                 }
diff --git a/qrtplib/rtprandom.cpp b/qrtplib/rtprandom.cpp
index 9362649f5..c354e6aa7 100644
--- a/qrtplib/rtprandom.cpp
+++ b/qrtplib/rtprandom.cpp
@@ -66,7 +66,7 @@ uint32_t RTPRandom::PickSeed()
 #else
     x += (uint32_t)clock();
 #endif
-    x ^= (uint32_t)((uint8_t *)this - (uint8_t *)0);
+    x ^= (uint32_t)(size_t)this;
     return x;
 }
 
diff --git a/sdrbase/audio/audioinputdevice.cpp b/sdrbase/audio/audioinputdevice.cpp
index 5ac907a90..955c644c0 100644
--- a/sdrbase/audio/audioinputdevice.cpp
+++ b/sdrbase/audio/audioinputdevice.cpp
@@ -143,7 +143,7 @@ bool AudioInputDevice::start(int device, int rate)
         if (m_audioInput->state() != QAudio::ActiveState) {
             qWarning("AudioInputDevice::start: cannot start");
         } else {
-            qDebug("AudioInputDevice::start: started buffer: %d bytes", m_audioInput->bufferSize());
+            qDebug("AudioInputDevice::start: started buffer: %d bytes", (int)m_audioInput->bufferSize());
         }
 	// }
 
diff --git a/sdrbase/audio/audiooutputdevice.cpp b/sdrbase/audio/audiooutputdevice.cpp
index c168b1f3c..cee5ad1d6 100644
--- a/sdrbase/audio/audiooutputdevice.cpp
+++ b/sdrbase/audio/audiooutputdevice.cpp
@@ -176,7 +176,7 @@ bool AudioOutputDevice::start(int deviceIndex, int sampleRate)
         if (m_audioOutput->state() != QAudio::ActiveState) {
             qWarning() << "AudioOutputDevice::start: cannot start - " << m_audioOutput->error();
         } else {
-            qDebug("AudioOutputDevice::start: started buffer: %d bytes", m_audioOutput->bufferSize());
+            qDebug("AudioOutputDevice::start: started buffer: %d bytes", (int)m_audioOutput->bufferSize());
         }
 
         if (m_managerMessageQueue) {
diff --git a/sdrbase/channel/channelapi.cpp b/sdrbase/channel/channelapi.cpp
index 8141ddc4e..9e5770eee 100644
--- a/sdrbase/channel/channelapi.cpp
+++ b/sdrbase/channel/channelapi.cpp
@@ -22,6 +22,7 @@
 
 #include "util/uid.h"
 #include "channelapi.h"
+#include "util/message.h"
 
 ChannelAPI::ChannelAPI(const QString& uri, StreamType streamType) :
     m_guiMessageQueue(nullptr),
diff --git a/sdrbase/maincore.cpp b/sdrbase/maincore.cpp
index 742d2266c..b80407deb 100644
--- a/sdrbase/maincore.cpp
+++ b/sdrbase/maincore.cpp
@@ -423,7 +423,7 @@ void MainCore::positionError(QGeoPositionInfoSource::Error positioningError)
 void MainCore::updateWakeLock()
 {
     bool running = false;
-    for (int i = 0; i < m_deviceSets.size(); i++)
+    for (size_t i = 0; i < m_deviceSets.size(); i++)
     {
         if (m_deviceSets[i]->m_deviceAPI->state() == DeviceAPI::StRunning)
         {
diff --git a/sdrbase/pipes/datafifostore.cpp b/sdrbase/pipes/datafifostore.cpp
index d9248eca0..6a81e40b8 100644
--- a/sdrbase/pipes/datafifostore.cpp
+++ b/sdrbase/pipes/datafifostore.cpp
@@ -34,7 +34,7 @@ QObject *DataFifoStore::createElement()
 {
     DataFifo *fifo = new DataFifo();
     m_dataFifos.push_back(fifo);
-    qDebug("DataFifoStore::createElement: %d added", m_dataFifos.size() - 1);
+    qDebug("DataFifoStore::createElement: %d added", (int)m_dataFifos.size() - 1);
     return fifo;
 }
 
diff --git a/sdrbase/pipes/messagequeuestore.cpp b/sdrbase/pipes/messagequeuestore.cpp
index f93e1283c..8e7c53d27 100644
--- a/sdrbase/pipes/messagequeuestore.cpp
+++ b/sdrbase/pipes/messagequeuestore.cpp
@@ -34,7 +34,7 @@ QObject *MessageQueueStore::createElement()
 {
     MessageQueue *messageQueue = new MessageQueue();
     m_messageQueues.push_back(messageQueue);
-    qDebug("MessageQueueStore::createElement: %d added", m_messageQueues.size() - 1);
+    qDebug("MessageQueueStore::createElement: %d added", (int)m_messageQueues.size() - 1);
     return messageQueue;
 }
 
diff --git a/sdrbase/util/iot/tplink.cpp b/sdrbase/util/iot/tplink.cpp
index 453e1cdc4..31ce4a32c 100644
--- a/sdrbase/util/iot/tplink.cpp
+++ b/sdrbase/util/iot/tplink.cpp
@@ -519,7 +519,6 @@ void TPLinkDeviceDiscoverer::handleReply(QNetworkReply* reply)
                                     if (sysInfoObj.contains(QStringLiteral("child_num")))
                                     {
                                         QJsonArray children = sysInfoObj.value(QStringLiteral("children")).toArray();
-                                        int child = 1;
                                         for (auto childRef : children)
                                         {
                                             QJsonObject childObj = childRef.toObject();
@@ -530,7 +529,6 @@ void TPLinkDeviceDiscoverer::handleReply(QNetworkReply* reply)
                                             }
                                             controlInfo->m_type = DeviceDiscoverer::BOOL;
                                             info.m_controls.append(controlInfo);
-                                            child++;
                                         }
                                     }
                                     else if (sysInfoObj.contains(QStringLiteral("relay_state")))
diff --git a/sdrgui/gui/featurelayout.cpp b/sdrgui/gui/featurelayout.cpp
index 98b9612ee..9b116fc3a 100644
--- a/sdrgui/gui/featurelayout.cpp
+++ b/sdrgui/gui/featurelayout.cpp
@@ -233,12 +233,6 @@ QSize FeatureLayout::doLayoutVertically(const QRect &rect, bool testOnly) const
     int lineHeight = 0;
     int spaceX = 0;
     int spaceY = 0;
-
-    // Calculate space available for rows of widgets
-    int maxHeightForRows = effectiveRect.height();
-    if (itemList.size() > 0) {
-        maxHeightForRows -= itemList[0]->minimumSize().height();
-    }
     int minWidth = 0;
 
     int i = 0;
diff --git a/sdrgui/gui/glscope.cpp b/sdrgui/gui/glscope.cpp
index 47ba26f26..c2a1c0c9e 100644
--- a/sdrgui/gui/glscope.cpp
+++ b/sdrgui/gui/glscope.cpp
@@ -858,7 +858,6 @@ void GLScope::paintGL()
 void GLScope::drawMarkers()
 {
     QVector4D markerColor(1.0f, 1.0f, 1.0f, 0.3f);
-    QVector4D markerTextColor(1.0f, 1.0f, 1.0f, 0.8f);
 
     if ((m_markers1.size() > 0) && ((m_displayMode == DisplayX) || (m_displayMode == DisplayXYH) || (m_displayMode == DisplayXYV))) // Draw markers1
     {
@@ -2397,13 +2396,13 @@ QString GLScope::displayScaled(float value, char type, int precision)
     }
     else
     {
-        if (posValue < 1000) {
+        if (posValue < 1000.0f) {
             return tr("%1").arg(QString::number(value, type, precision));
-        } else if (posValue < 1000000) {
+        } else if (posValue < 1000000.0f) {
             return tr("%1k").arg(QString::number(value / 1000.0, type, precision));
-        } else if (posValue < 1000000000) {
+        } else if (posValue < 1000000000.0f) {
             return tr("%1M").arg(QString::number(value / 1000000.0, type, precision));
-        } else if (posValue < 1000000000000) {
+        } else if (posValue < 1000000000000.0f) {
             return tr("%1G").arg(QString::number(value / 1000000000.0, type, precision));
         } else {
             return tr("%1").arg(QString::number(value, 'e', precision));
diff --git a/sdrgui/mainwindow.cpp b/sdrgui/mainwindow.cpp
index 3b905a7dd..ea187b4df 100644
--- a/sdrgui/mainwindow.cpp
+++ b/sdrgui/mainwindow.cpp
@@ -1350,9 +1350,9 @@ void MainWindow::loadConfiguration(const Configuration *configuration, bool from
 	qDebug("MainWindow::loadConfiguration: configuration [%s | %s] %d workspace(s) - %d device set(s) - %d feature(s)",
 		qPrintable(configuration->getGroup()),
 		qPrintable(configuration->getDescription()),
-        configuration->getNumberOfWorkspaceGeometries(),
-        configuration->getDeviceSetPresets().size(),
-        configuration->getFeatureSetPreset().getFeatureCount()
+        (int)configuration->getNumberOfWorkspaceGeometries(),
+        (int)configuration->getDeviceSetPresets().size(),
+        (int)configuration->getFeatureSetPreset().getFeatureCount()
     );
 
     QProgressDialog *waitBox = nullptr;
@@ -1549,7 +1549,7 @@ void MainWindow::saveConfiguration(Configuration *configuration)
 	qDebug("MainWindow::saveConfiguration: configuration [%s | %s] %d workspaces",
 		qPrintable(configuration->getGroup()),
 		qPrintable(configuration->getDescription()),
-        m_workspaces.size()
+        (int)m_workspaces.size()
     );
 
     configuration->clearData();
diff --git a/wdsp/gain.hpp b/wdsp/gain.hpp
index 5e6e2e3d0..1f29105a9 100644
--- a/wdsp/gain.hpp
+++ b/wdsp/gain.hpp
@@ -25,7 +25,7 @@ warren@wpratt.com
 
 */
 
-#ifndef wdso_gain_h
+#ifndef wdsp_gain_h
 #define wdsp_gain_h
 
 #include "export.h"