diff --git a/src/process/FFTDataDistributor.cpp b/src/process/FFTDataDistributor.cpp
index 07a6a3d..0b9c17e 100644
--- a/src/process/FFTDataDistributor.cpp
+++ b/src/process/FFTDataDistributor.cpp
@@ -21,7 +21,7 @@ void FFTDataDistributor::setLinesPerSecond(unsigned int lines) {
 	this->linesPerSecond = lines;
 }
 
-unsigned int FFTDataDistributor::getLinesPerSecond() {
+unsigned int FFTDataDistributor::getLinesPerSecond() const {
 	return this->linesPerSecond;
 }
 
diff --git a/src/process/FFTDataDistributor.h b/src/process/FFTDataDistributor.h
index 9f60288..452ab87 100644
--- a/src/process/FFTDataDistributor.h
+++ b/src/process/FFTDataDistributor.h
@@ -14,12 +14,12 @@ public:
     FFTDataDistributor();
     void setFFTSize(unsigned int size);
     void setLinesPerSecond(unsigned int lines);
-    unsigned int getLinesPerSecond();
+    unsigned int getLinesPerSecond() const;
 
 protected:
-    virtual void process();
+    void process() override;
     
-    DemodulatorThreadIQData inputBuffer, tempBuffer;
+    DemodulatorThreadIQData inputBuffer;
     ReBuffer<DemodulatorThreadIQData> outputBuffers;
     std::atomic<unsigned int> fftSize;
    
diff --git a/src/process/FFTVisualDataThread.cpp b/src/process/FFTVisualDataThread.cpp
index 0dd398e..8961239 100644
--- a/src/process/FFTVisualDataThread.cpp
+++ b/src/process/FFTVisualDataThread.cpp
@@ -2,16 +2,13 @@
 // SPDX-License-Identifier: GPL-2.0+
 
 #include "FFTVisualDataThread.h"
-#include "CubicSDR.h"
 
 FFTVisualDataThread::FFTVisualDataThread() {
 	linesPerSecond.store(DEFAULT_WATERFALL_LPS);
     lpsChanged.store(true);
 }
 
-FFTVisualDataThread::~FFTVisualDataThread() {
-    
-}
+FFTVisualDataThread::~FFTVisualDataThread() = default;
 
 void FFTVisualDataThread::setLinesPerSecond(int lps) {
     linesPerSecond.store(lps);
diff --git a/src/process/FFTVisualDataThread.h b/src/process/FFTVisualDataThread.h
index 549950b..6d2b53b 100644
--- a/src/process/FFTVisualDataThread.h
+++ b/src/process/FFTVisualDataThread.h
@@ -10,15 +10,15 @@
 class FFTVisualDataThread : public IOThread {
 public:
     FFTVisualDataThread();
-    ~FFTVisualDataThread();
+    ~FFTVisualDataThread() override;
     
     void setLinesPerSecond(int lps);
     int getLinesPerSecond();
     SpectrumVisualProcessor *getProcessor();
     
-    virtual void run();
+    void run() override;
 
-    virtual void terminate();
+    void terminate() override;
     
 protected:
     FFTDataDistributor fftDistrib;
diff --git a/src/process/ScopeVisualProcessor.cpp b/src/process/ScopeVisualProcessor.cpp
index a1eefac..3ee4691 100644
--- a/src/process/ScopeVisualProcessor.cpp
+++ b/src/process/ScopeVisualProcessor.cpp
@@ -3,7 +3,6 @@
 
 #include "ScopeVisualProcessor.h"
 #include <cstring>
-#include <string>
 
 ScopeVisualProcessor::ScopeVisualProcessor(): outputBuffers("ScopeVisualProcessorBuffers") {
     scopeEnabled.store(true);
diff --git a/src/process/ScopeVisualProcessor.h b/src/process/ScopeVisualProcessor.h
index 0cd5a44..e9417e0 100644
--- a/src/process/ScopeVisualProcessor.h
+++ b/src/process/ScopeVisualProcessor.h
@@ -19,9 +19,7 @@ public:
     int fft_size;
     double fft_floor, fft_ceil;
 
-    virtual ~ScopeRenderData() {
-
-    }
+    virtual ~ScopeRenderData() = default;
 };
 
 typedef std::shared_ptr<ScopeRenderData> ScopeRenderDataPtr;
@@ -33,12 +31,12 @@ typedef std::shared_ptr<ScopeRenderDataQueue> ScopeRenderDataQueuePtr;
 class ScopeVisualProcessor : public VisualProcessor<AudioThreadInput, ScopeRenderData> {
 public:
     ScopeVisualProcessor();
-    ~ScopeVisualProcessor();
+    ~ScopeVisualProcessor() override;
     void setup(int fftSize_in);
     void setScopeEnabled(bool scopeEnable);
     void setSpectrumEnabled(bool spectrumEnable);
 protected:
-    virtual void process();
+    void process() override;
     ReBuffer<ScopeRenderData> outputBuffers;
 
     std::atomic_bool scopeEnabled;
diff --git a/src/process/SpectrumVisualDataThread.cpp b/src/process/SpectrumVisualDataThread.cpp
index 5841f52..0a59f71 100644
--- a/src/process/SpectrumVisualDataThread.cpp
+++ b/src/process/SpectrumVisualDataThread.cpp
@@ -2,14 +2,10 @@
 // SPDX-License-Identifier: GPL-2.0+
 
 #include "SpectrumVisualDataThread.h"
-#include "CubicSDR.h"
 
-SpectrumVisualDataThread::SpectrumVisualDataThread() {
-}
+SpectrumVisualDataThread::SpectrumVisualDataThread() = default;
 
-SpectrumVisualDataThread::~SpectrumVisualDataThread() {
-    
-}
+SpectrumVisualDataThread::~SpectrumVisualDataThread() = default;
 
 SpectrumVisualProcessor *SpectrumVisualDataThread::getProcessor() {
     return &sproc;
diff --git a/src/process/SpectrumVisualDataThread.h b/src/process/SpectrumVisualDataThread.h
index 0c3eccf..b0fc375 100644
--- a/src/process/SpectrumVisualDataThread.h
+++ b/src/process/SpectrumVisualDataThread.h
@@ -9,12 +9,12 @@
 class SpectrumVisualDataThread : public IOThread {
 public:
     SpectrumVisualDataThread();
-    ~SpectrumVisualDataThread();
+    ~SpectrumVisualDataThread() override;
     SpectrumVisualProcessor *getProcessor();
     
-    virtual void run();
+    void run() override;
 
-    virtual void terminate();
+    void terminate() override;
     
 protected:
     SpectrumVisualProcessor sproc;
diff --git a/src/process/SpectrumVisualProcessor.cpp b/src/process/SpectrumVisualProcessor.cpp
index 74b4a26..94f0e35 100644
--- a/src/process/SpectrumVisualProcessor.cpp
+++ b/src/process/SpectrumVisualProcessor.cpp
@@ -201,11 +201,11 @@ unsigned int SpectrumVisualProcessor::getFFTSize() {
 }
 
 
-void SpectrumVisualProcessor::setHideDC(bool hideDC) {
+void SpectrumVisualProcessor::setHideDC(bool hideDC_in) {
 
 	std::lock_guard < std::mutex > busy_lock(busy_run);
 
-    this->hideDC = hideDC;
+    hideDC = hideDC_in;
 }
 
 
@@ -274,7 +274,7 @@ void SpectrumVisualProcessor::process() {
     
     std::vector<liquid_float_complex> *data = &iqData->data;
     
-    if (data && data->size()) {
+    if (data && !data->empty()) {
         unsigned int num_written;
         long resampleBw = iqData->sampleRate;
         bool newResampler = false;
diff --git a/src/process/SpectrumVisualProcessor.h b/src/process/SpectrumVisualProcessor.h
index f40069c..c66d737 100644
--- a/src/process/SpectrumVisualProcessor.h
+++ b/src/process/SpectrumVisualProcessor.h
@@ -19,7 +19,7 @@ public:
     long long centerFreq;
     int bandwidth;
 
-    virtual ~SpectrumVisualData() {};
+    virtual ~SpectrumVisualData() = default;;
 };
 
 typedef std::shared_ptr<SpectrumVisualData> SpectrumVisualDataPtr;
@@ -29,7 +29,7 @@ typedef std::shared_ptr<SpectrumVisualDataQueue> SpectrumVisualDataQueuePtr;
 class SpectrumVisualProcessor : public VisualProcessor<DemodulatorThreadIQData, SpectrumVisualData> {
 public:
     SpectrumVisualProcessor();
-    ~SpectrumVisualProcessor();
+    ~SpectrumVisualProcessor() override;
     
     bool isView();
     void setView(bool bView);
@@ -52,13 +52,13 @@ public:
     void setup(unsigned int fftSize);
     void setFFTSize(unsigned int fftSize);
     unsigned int getFFTSize();
-    void setHideDC(bool hideDC);
+    void setHideDC(bool hideDC_in);
     
     void setScaleFactor(float sf);
     float getScaleFactor();
     
 protected:
-    virtual void process();
+    void process() override;
     
     ReBuffer<SpectrumVisualData> outputBuffers;
   
diff --git a/src/process/VisualProcessor.h b/src/process/VisualProcessor.h
index 904ca8b..5b0fd26 100644
--- a/src/process/VisualProcessor.h
+++ b/src/process/VisualProcessor.h
@@ -24,8 +24,7 @@ public:
     typedef  std::shared_ptr<VisualInputQueueType> VisualInputQueueTypePtr;
     typedef  std::shared_ptr<VisualOutputQueueType> VisualOutputQueueTypePtr;
 
-	virtual ~VisualProcessor() {
-	}
+	virtual ~VisualProcessor();
     
     bool isInputEmpty() {
         std::lock_guard < std::mutex > busy_lock(busy_update);
@@ -155,6 +154,9 @@ protected:
     std::mutex busy_update;
 };
 
+template<typename InputDataType, typename OutputDataType>
+VisualProcessor<InputDataType, OutputDataType>::~VisualProcessor() = default;
+
 //Specialization much like VisualDataReDistributor, except 
 //the input (pointer) is directly re-dispatched
 //to outputs, so that all output indeed SHARE the same instance.