diff --git a/src/AppFrame.cpp b/src/AppFrame.cpp
index 9d59c67..1e621dd 100644
--- a/src/AppFrame.cpp
+++ b/src/AppFrame.cpp
@@ -35,11 +35,10 @@ EVT_CLOSE(AppFrame::OnClose)
 EVT_MENU(wxID_ANY, AppFrame::OnMenu)
 EVT_COMMAND(wxID_ANY, wxEVT_THREAD, AppFrame::OnThread)
 EVT_IDLE(AppFrame::OnIdle)
-EVT_TIMER(FRAME_TIMER_ID, AppFrame::OnTimer)
 wxEND_EVENT_TABLE()
 
 AppFrame::AppFrame() :
-        wxFrame(NULL, wxID_ANY, CUBICSDR_TITLE), activeDemodulator(NULL), frame_timer(this, FRAME_TIMER_ID) {
+        wxFrame(NULL, wxID_ANY, CUBICSDR_TITLE), activeDemodulator(NULL) {
 
 #ifdef __linux__
     SetIcon(wxICON(cubicsdr));
@@ -107,6 +106,7 @@ AppFrame::AppFrame() :
     demodGainMeter = new MeterCanvas(this, attribList);
     demodGainMeter->setMax(2.0);
     demodGainMeter->setHelpTip("Current Demodulator Gain Level.  Click / Drag to set Gain level.");
+    demodGainMeter->setShowUserInput(false);
     demodTray->Add(demodGainMeter, 1, wxEXPAND | wxALL, 0);
 
     vbox->Add(demodTray, 12, wxEXPAND | wxALL, 0);
@@ -118,9 +118,10 @@ AppFrame::AppFrame() :
     wxGetApp().getSpectrumProcesor()->attachOutput(spectrumCanvas->getVisualDataQueue());
             
     spectrumAvgMeter = new MeterCanvas(this, attribList);
-    spectrumAvgMeter->setMax(3.0);
-    spectrumAvgMeter->setInputValue(1.0);
-    
+    spectrumAvgMeter->setMax(1.0);
+    spectrumAvgMeter->setLevel(0.65);
+    spectrumAvgMeter->setShowUserInput(false);
+
     spectrumSizer->Add(spectrumCanvas, 63, wxEXPAND | wxALL, 0);
     spectrumSizer->AddSpacer(1);
     spectrumSizer->Add(spectrumAvgMeter, 1, wxEXPAND | wxALL, 0);
@@ -143,7 +144,8 @@ AppFrame::AppFrame() :
             
     waterfallSpeedMeter = new MeterCanvas(this, attribList);
     waterfallSpeedMeter->setMax(sqrt(1024));
-    waterfallSpeedMeter->setInputValue(sqrt(DEFAULT_WATERFALL_LPS));
+    waterfallSpeedMeter->setLevel(sqrt(DEFAULT_WATERFALL_LPS));
+    waterfallSpeedMeter->setShowUserInput(false);
 
     wfSizer->Add(waterfallCanvas, 63, wxEXPAND | wxALL, 0);
     wfSizer->AddSpacer(1);
@@ -261,7 +263,7 @@ AppFrame::AppFrame() :
 //    sampleRateMenuItems[wxID_BANDWIDTH_3000M] = menu->AppendRadioItem(wxID_BANDWIDTH_3000M, "3.0M");
     sampleRateMenuItems[wxID_BANDWIDTH_3200M] = menu->AppendRadioItem(wxID_BANDWIDTH_3200M, "3.2M");
 
-    sampleRateMenuItems[wxID_BANDWIDTH_2400M]->Check(true);
+    sampleRateMenuItems[wxID_BANDWIDTH_2048M]->Check(true);
 
     menuBar->Append(menu, wxT("&Input Bandwidth"));
 
@@ -402,11 +404,6 @@ void AppFrame::initDeviceParams(std::string deviceId) {
     if (devConfig->getIQSwap()) {
         iqSwapMenuItem->Check();
     }
-    
-    if (!frame_timer.IsRunning()) {
-        // frame rate = 1000 / 30 = 33ms
-        frame_timer.Start(25);
-    }
 }
 
 
@@ -601,10 +598,6 @@ void AppFrame::OnThread(wxCommandEvent& event) {
 }
 
 void AppFrame::OnIdle(wxIdleEvent& event) {
-    event.Skip();
-}
-
-void AppFrame::OnTimer(wxTimerEvent& event) {
 
     DemodulatorInstance *demod = wxGetApp().getDemodMgr().getLastActiveDemodulator();
 
@@ -719,9 +712,15 @@ void AppFrame::OnTimer(wxTimerEvent& event) {
     
     wxGetApp().getScopeProcessor()->run();
     wxGetApp().getSpectrumDistributor()->run();
-    
+
     SpectrumVisualProcessor *proc = wxGetApp().getSpectrumProcesor();
     
+    if (spectrumAvgMeter->inputChanged()) {
+        float val = spectrumAvgMeter->getInputValue();
+        spectrumAvgMeter->setLevel(val);
+        proc->setFFTAverageRate(val);
+    }
+    
     proc->setView(spectrumCanvas->getViewState());
     proc->setBandwidth(spectrumCanvas->getBandwidth());
     proc->setCenterFrequency(spectrumCanvas->getCenterFrequency());
@@ -747,7 +746,8 @@ void AppFrame::OnTimer(wxTimerEvent& event) {
     }
     
     if (waterfallSpeedMeter->inputChanged()) {
-        int val = (int)waterfallSpeedMeter->getInputValue();
+        float val = waterfallSpeedMeter->getInputValue();
+        waterfallSpeedMeter->setLevel(val);
         fftDistrib.setLinesPerSecond((int)ceil(val*val));
         wxGetApp().getWaterfallVisualQueue()->set_max_num_items((int)ceil(val*val));
     }
@@ -761,33 +761,15 @@ void AppFrame::OnTimer(wxTimerEvent& event) {
     while (!wproc->isInputEmpty()) {
         wproc->run();
     }
+    
+    waterfallCanvas->processInputQueue();
+    demodWaterfallCanvas->processInputQueue();
 
+#ifndef _WIN32
+    usleep(5000);
+#endif
     
-    scopeCanvas->Refresh();
-    
-    waterfallCanvas->Refresh();
-    spectrumCanvas->Refresh();
-    
-    demodWaterfallCanvas->Refresh();
-    demodSpectrumCanvas->Refresh();
-    
-    demodSignalMeter->Refresh();
-    demodGainMeter->Refresh();
-
-    if (demodTuner->getMouseTracker()->mouseInView() || demodTuner->changed()) {
-        demodTuner->Refresh();
-    }
-    if (demodModeSelector->getMouseTracker()->mouseInView()) {
-        demodModeSelector->Refresh();
-    }
-    if (waterfallSpeedMeter->getMouseTracker()->mouseInView()) {
-        waterfallSpeedMeter->Refresh();
-    }
-    if (spectrumAvgMeter->getMouseTracker()->mouseInView()) {
-        spectrumAvgMeter->Refresh();
-    }
-    
-    event.Skip();
+    event.RequestMore();
 }
 
 void AppFrame::saveSession(std::string fileName) {
diff --git a/src/AppFrame.h b/src/AppFrame.h
index 7194068..3531de5 100644
--- a/src/AppFrame.h
+++ b/src/AppFrame.h
@@ -50,8 +50,6 @@
 #define wxID_AUDIO_BANDWIDTH_BASE 9000
 #define wxID_AUDIO_DEVICE_MULTIPLIER 50
 
-#define FRAME_TIMER_ID 1000
-
 // Define a new frame type
 class AppFrame: public wxFrame {
 public:
@@ -69,7 +67,6 @@ private:
     void OnClose(wxCloseEvent& event);
     void OnNewWindow(wxCommandEvent& event);
     void OnIdle(wxIdleEvent& event);
-    void OnTimer(wxTimerEvent& event);
 
     ScopeCanvas *scopeCanvas;
     SpectrumCanvas *spectrumCanvas;
@@ -96,7 +93,6 @@ private:
     wxMenuItem *iqSwapMenuItem;
     
     std::string currentSessionFile;
-    wxTimer frame_timer;
     
     FFTDataDistributor fftDistrib;
     DemodulatorThreadInputQueue fftQueue;
diff --git a/src/CubicSDR.cpp b/src/CubicSDR.cpp
index ca1eef3..2283d57 100644
--- a/src/CubicSDR.cpp
+++ b/src/CubicSDR.cpp
@@ -78,9 +78,11 @@ bool CubicSDR::OnInit() {
     scopeProcessor.setInput(pipeAudioVisualData);
     
     // I/Q Data
-    pipeSDRIQData = new SDRThreadIQDataQueue;
+    pipeSDRIQData = new SDRThreadIQDataQueue();
     pipeSDRCommand = new SDRThreadCommandQueue();
 
+    pipeSDRIQData->set_max_num_items(1);
+    
     sdrThread = new SDRThread();
     sdrThread->setInputQueue("SDRCommandQueue",pipeSDRCommand);
     sdrThread->setOutputQueue("IQDataOutput",pipeSDRIQData);
diff --git a/src/CubicSDRDefs.h b/src/CubicSDRDefs.h
index fb96a68..677e68b 100644
--- a/src/CubicSDRDefs.h
+++ b/src/CubicSDRDefs.h
@@ -27,10 +27,10 @@ const char filePathSeparator =
 
 #define BUF_SIZE (16384*6)
 
-#define DEFAULT_SAMPLE_RATE 2400000
+#define DEFAULT_SAMPLE_RATE 2048000
 #define DEFAULT_FFT_SIZE 2048
 
 #define DEFAULT_DEMOD_TYPE 1
 #define DEFAULT_DEMOD_BW 200000
 
-#define DEFAULT_WATERFALL_LPS 24
\ No newline at end of file
+#define DEFAULT_WATERFALL_LPS 30
\ No newline at end of file
diff --git a/src/IOThread.h b/src/IOThread.h
index 734b37a..743635c 100644
--- a/src/IOThread.h
+++ b/src/IOThread.h
@@ -5,6 +5,7 @@
 #include <deque>
 #include <map>
 #include <string>
+#include <iostream>
 
 #include "ThreadQueue.h"
 
@@ -63,6 +64,10 @@ public:
             return buf;
         }
         
+//        if (outputBuffers.size() > 100) {
+//            std::cout << "Buffer over 100.." << std::endl;
+//        }
+        
         buf = new BufferType();
         outputBuffers.push_back(buf);
         
diff --git a/src/demod/DemodulatorThread.cpp b/src/demod/DemodulatorThread.cpp
index d987a15..becc261 100644
--- a/src/demod/DemodulatorThread.cpp
+++ b/src/demod/DemodulatorThread.cpp
@@ -94,7 +94,7 @@ void DemodulatorThread::run() {
     while (!terminated) {
         DemodulatorThreadPostIQData *inp;
         iqInputQueue->pop(inp);
-        std::lock_guard < std::mutex > lock(inp->m_mutex);
+//        std::lock_guard < std::mutex > lock(inp->m_mutex);
 
         int bufSize = inp->data.size();
 
diff --git a/src/process/SpectrumVisualProcessor.cpp b/src/process/SpectrumVisualProcessor.cpp
index 932477b..34b2543 100644
--- a/src/process/SpectrumVisualProcessor.cpp
+++ b/src/process/SpectrumVisualProcessor.cpp
@@ -15,6 +15,7 @@ SpectrumVisualProcessor::SpectrumVisualProcessor() : lastInputBandwidth(0), last
     fft_ceil_ma = fft_ceil_maa = 100.0;
     fft_floor_ma = fft_floor_maa = 0.0;
     desiredInputSize = 0;
+    fft_average_rate = 0.65;
 }
 
 SpectrumVisualProcessor::~SpectrumVisualProcessor() {
@@ -29,6 +30,9 @@ void SpectrumVisualProcessor::setView(bool bView) {
     is_view.store(bView);
 }
 
+void SpectrumVisualProcessor::setFFTAverageRate(float fftAverageRate) {
+    this->fft_average_rate = fftAverageRate;
+}
 
 void SpectrumVisualProcessor::setCenterFrequency(long long centerFreq_in) {
     centerFreq.store(centerFreq_in);
@@ -260,11 +264,11 @@ void SpectrumVisualProcessor::process() {
             
             for (int i = 0, iMax = fftSize; i < iMax; i++) {
                 if (is_view.load()) {
-                    fft_result_maa[i] += (fft_result_ma[i] - fft_result_maa[i]) * 0.65;
-                    fft_result_ma[i] += (fft_result[i] - fft_result_ma[i]) * 0.65;
+                    fft_result_maa[i] += (fft_result_ma[i] - fft_result_maa[i]) * fft_average_rate;
+                    fft_result_ma[i] += (fft_result[i] - fft_result_ma[i]) * fft_average_rate;
                 } else {
-                    fft_result_maa[i] += (fft_result_ma[i] - fft_result_maa[i]) * 0.65;
-                    fft_result_ma[i] += (fft_result[i] - fft_result_ma[i]) * 0.65;
+                    fft_result_maa[i] += (fft_result_ma[i] - fft_result_maa[i]) * fft_average_rate;
+                    fft_result_ma[i] += (fft_result[i] - fft_result_ma[i]) * fft_average_rate;
                 }
                 
                 if (fft_result_maa[i] > fft_ceil) {
diff --git a/src/process/SpectrumVisualProcessor.h b/src/process/SpectrumVisualProcessor.h
index 39f97ad..4f6374d 100644
--- a/src/process/SpectrumVisualProcessor.h
+++ b/src/process/SpectrumVisualProcessor.h
@@ -21,6 +21,8 @@ public:
     bool isView();
     void setView(bool bView);
     
+    void setFFTAverageRate(float fftAverageRate);
+    
     void setCenterFrequency(long long centerFreq_in);
     long long getCenterFrequency();
     
@@ -50,6 +52,7 @@ private:
     
     double fft_ceil_ma, fft_ceil_maa;
     double fft_floor_ma, fft_floor_maa;
+    float fft_average_rate;
     
     std::vector<double> fft_result;
     std::vector<double> fft_result_ma;
diff --git a/src/sdr/SDRPostThread.cpp b/src/sdr/SDRPostThread.cpp
index 4efc143..30944cf 100644
--- a/src/sdr/SDRPostThread.cpp
+++ b/src/sdr/SDRPostThread.cpp
@@ -86,11 +86,14 @@ void SDRPostThread::run() {
     std::vector<liquid_float_complex> fpData;
     std::vector<liquid_float_complex> dataOut;
     
+    iqDataInQueue->set_max_num_items(0);
+    
     while (!terminated) {
         SDRThreadIQData *data_in;
         
         iqDataInQueue->pop(data_in);
         //        std::lock_guard < std::mutex > lock(data_in->m_mutex);
+        int num_vis_samples = this->num_vis_samples;
         
         if (data_in && data_in->data.size()) {
             int dataSize = data_in->data.size()/2;
@@ -120,6 +123,10 @@ void SDRPostThread::run() {
                 visualDataOut->busy_rw.lock();
                 visualDataOut->setRefCount(1);
                 
+                if (num_vis_samples > dataOut.size()) {
+                    num_vis_samples = dataOut.size();
+                }
+
                 if (visualDataOut->data.size() < num_vis_samples) {
                     if (visualDataOut->data.capacity() < num_vis_samples) {
                         visualDataOut->data.reserve(num_vis_samples);
@@ -198,8 +205,12 @@ void SDRPostThread::run() {
                 }
                 
                 if (iqDataOutQueue != NULL) {
-                    iqDataOutQueue->push(demodDataOut);
-                    pushedData = true;
+                    if (!iqDataOutQueue->full()) {
+                        iqDataOutQueue->push(demodDataOut);
+                        pushedData = true;
+                    } else {
+                        demodDataOut->decRefCount();
+                    }
                 }
                 
                 if (!pushedData && iqDataOutQueue == NULL) {
diff --git a/src/visual/MeterCanvas.cpp b/src/visual/MeterCanvas.cpp
index 423fc20..46153a0 100644
--- a/src/visual/MeterCanvas.cpp
+++ b/src/visual/MeterCanvas.cpp
@@ -25,7 +25,7 @@ EVT_ENTER_WINDOW(MeterCanvas::OnMouseEnterWindow)
 wxEND_EVENT_TABLE()
 
 MeterCanvas::MeterCanvas(wxWindow *parent, int *attribList) :
-        InteractiveCanvas(parent, attribList), level(0), level_max(1), inputValue(0), userInputValue(0) {
+        InteractiveCanvas(parent, attribList), level(0), level_max(1), inputValue(0), userInputValue(0), showUserInput(true) {
 
     glContext = new MeterContext(this, &wxGetApp().GetContext(this));
 }
@@ -58,6 +58,10 @@ float MeterCanvas::getInputValue() {
     return userInputValue;
 }
 
+void MeterCanvas::setShowUserInput(bool showUserInput) {
+    this->showUserInput = showUserInput;
+}
+
 void MeterCanvas::OnPaint(wxPaintEvent& WXUNUSED(event)) {
     wxPaintDC dc(this);
     const wxSize ClientSize = GetClientSize();
@@ -68,18 +72,23 @@ void MeterCanvas::OnPaint(wxPaintEvent& WXUNUSED(event)) {
     glViewport(0, 0, ClientSize.x, ClientSize.y);
 
     glContext->DrawBegin();
+    glContext->Draw(ThemeMgr::mgr.currentTheme->generalBackground.r, ThemeMgr::mgr.currentTheme->generalBackground.g, ThemeMgr::mgr.currentTheme->generalBackground.b, 0.5, 1.0);
+    
     if (mouseTracker.mouseInView()) {
         glContext->Draw(0.4, 0.4, 0.4, 0.5, mouseTracker.getMouseY());
     }
     glContext->Draw(ThemeMgr::mgr.currentTheme->meterLevel.r, ThemeMgr::mgr.currentTheme->meterLevel.g, ThemeMgr::mgr.currentTheme->meterLevel.b, 0.5, level / level_max);
-    glContext->Draw(ThemeMgr::mgr.currentTheme->meterValue.r, ThemeMgr::mgr.currentTheme->meterValue.g, ThemeMgr::mgr.currentTheme->meterValue.b, 0.5, userInputValue / level_max);
+    if (showUserInput) {
+        glContext->Draw(ThemeMgr::mgr.currentTheme->meterValue.r, ThemeMgr::mgr.currentTheme->meterValue.g, ThemeMgr::mgr.currentTheme->meterValue.b, 0.5, userInputValue / level_max);
+    }
     glContext->DrawEnd();
 
     SwapBuffers();
 }
 
 void MeterCanvas::OnIdle(wxIdleEvent &event) {
-    event.Skip();
+    Refresh();
+    event.RequestMore();
 }
 
 void MeterCanvas::OnMouseMoved(wxMouseEvent& event) {
diff --git a/src/visual/MeterCanvas.h b/src/visual/MeterCanvas.h
index a6968b1..0cc97cd 100644
--- a/src/visual/MeterCanvas.h
+++ b/src/visual/MeterCanvas.h
@@ -26,6 +26,7 @@ public:
     void setInputValue(float slider_in);
     bool inputChanged();
     float getInputValue();
+    void setShowUserInput(bool showUserInput);
 
     void setHelpTip(std::string tip);
 
@@ -48,6 +49,8 @@ private:
     float inputValue;
     float userInputValue;
 
+    bool showUserInput;
+    
     std::string helpTip;
     //
 wxDECLARE_EVENT_TABLE();
diff --git a/src/visual/ModeSelectorCanvas.cpp b/src/visual/ModeSelectorCanvas.cpp
index 98172b5..5058291 100644
--- a/src/visual/ModeSelectorCanvas.cpp
+++ b/src/visual/ModeSelectorCanvas.cpp
@@ -72,7 +72,8 @@ void ModeSelectorCanvas::OnPaint(wxPaintEvent& WXUNUSED(event)) {
 }
 
 void ModeSelectorCanvas::OnIdle(wxIdleEvent &event) {
-    event.Skip();
+    Refresh();
+    event.RequestMore();
 }
 
 void ModeSelectorCanvas::OnMouseMoved(wxMouseEvent& event) {
diff --git a/src/visual/ScopeCanvas.cpp b/src/visual/ScopeCanvas.cpp
index 1063c16..a4cd4be 100644
--- a/src/visual/ScopeCanvas.cpp
+++ b/src/visual/ScopeCanvas.cpp
@@ -87,7 +87,8 @@ void ScopeCanvas::OnPaint(wxPaintEvent& WXUNUSED(event)) {
 }
 
 void ScopeCanvas::OnIdle(wxIdleEvent &event) {
-    event.Skip();
+    Refresh();
+    event.RequestMore();
 }
 
 ScopeRenderDataQueue *ScopeCanvas::getInputQueue() {
diff --git a/src/visual/SpectrumCanvas.cpp b/src/visual/SpectrumCanvas.cpp
index f07ae9c..f21a6a8 100644
--- a/src/visual/SpectrumCanvas.cpp
+++ b/src/visual/SpectrumCanvas.cpp
@@ -85,7 +85,8 @@ void SpectrumCanvas::OnPaint(wxPaintEvent& WXUNUSED(event)) {
 
 
 void SpectrumCanvas::OnIdle(wxIdleEvent &event) {
-    event.Skip();
+    Refresh();
+    event.RequestMore();
 }
 
 
diff --git a/src/visual/TuningCanvas.cpp b/src/visual/TuningCanvas.cpp
index cb618f6..8a85ac4 100644
--- a/src/visual/TuningCanvas.cpp
+++ b/src/visual/TuningCanvas.cpp
@@ -252,6 +252,10 @@ void TuningCanvas::OnIdle(wxIdleEvent &event) {
             dragging = false;
         }
     }
+    if (mouseTracker.mouseInView() || changed()) {
+        Refresh();
+    }
+    event.RequestMore();
 }
 
 void TuningCanvas::OnMouseMoved(wxMouseEvent& event) {
diff --git a/src/visual/WaterfallCanvas.cpp b/src/visual/WaterfallCanvas.cpp
index 51d1723..2a52a11 100644
--- a/src/visual/WaterfallCanvas.cpp
+++ b/src/visual/WaterfallCanvas.cpp
@@ -68,6 +68,25 @@ void WaterfallCanvas::attachSpectrumCanvas(SpectrumCanvas *canvas_in) {
     spectrumCanvas = canvas_in;
 }
 
+void WaterfallCanvas::processInputQueue() {
+    if (!glContext) {
+        return;
+    }
+    glContext->SetCurrent(*this);
+    
+    while (!visualDataQueue.empty()) {
+        SpectrumVisualData *vData;
+        
+        visualDataQueue.pop(vData);
+        
+        if (vData) {
+            waterfallPanel.setPoints(vData->spectrum_points);
+            waterfallPanel.step();
+            vData->decRefCount();
+        }
+    }
+}
+
 void WaterfallCanvas::OnPaint(wxPaintEvent& WXUNUSED(event)) {
     wxPaintDC dc(this);
 
@@ -139,18 +158,6 @@ void WaterfallCanvas::OnPaint(wxPaintEvent& WXUNUSED(event)) {
     glContext->SetCurrent(*this);
     initGLExtensions();
     glViewport(0, 0, ClientSize.x, ClientSize.y);
-    
-    while (!visualDataQueue.empty()) {
-        SpectrumVisualData *vData;
-        
-        visualDataQueue.pop(vData);
-        
-        if (vData) {
-            waterfallPanel.setPoints(vData->spectrum_points);
-            waterfallPanel.step();
-            vData->decRefCount();
-        }
-    }
 
     glContext->BeginDraw(0,0,0);
 
@@ -347,7 +354,8 @@ void WaterfallCanvas::OnKeyDown(wxKeyEvent& event) {
     }
 }
 void WaterfallCanvas::OnIdle(wxIdleEvent &event) {
-    event.Skip();
+    Refresh();
+    event.RequestMore();
 }
 
 void WaterfallCanvas::OnMouseMoved(wxMouseEvent& event) {
diff --git a/src/visual/WaterfallCanvas.h b/src/visual/WaterfallCanvas.h
index b570ffb..2f51ec3 100644
--- a/src/visual/WaterfallCanvas.h
+++ b/src/visual/WaterfallCanvas.h
@@ -26,6 +26,7 @@ public:
     DragState getNextDragState();
     
     void attachSpectrumCanvas(SpectrumCanvas *canvas_in);
+    void processInputQueue();
     SpectrumVisualDataQueue *getVisualDataQueue();
 
 private: