diff --git a/Source/Expression.h b/Source/Expression.h
index edb33db..3ecb326 100644
--- a/Source/Expression.h
+++ b/Source/Expression.h
@@ -30,7 +30,6 @@ struct Expression
         symbolTable.add_variable("prev", previous);
         symbolTable.add_constants();
         expression.register_symbol_table(symbolTable);
-        parser.settings().disable_all_control_structures();
         parser.settings().enable_all_control_structures();
         setExpr(initialExpr);
     }
diff --git a/Source/PluginEditor.cpp b/Source/PluginEditor.cpp
index a405671..976d875 100644
--- a/Source/PluginEditor.cpp
+++ b/Source/PluginEditor.cpp
@@ -24,6 +24,7 @@ TransferAudioProcessorEditor::TransferAudioProcessorEditor(TransferAudioProcesso
     m_expressionLabel.setFont(m_titleLF.getLabelFont(m_expressionLabel));
     m_expressionLabel.setJustificationType(juce::Justification::centredTop);
     m_expressionLabel.setText("transfer", juce::dontSendNotification);
+    addAndMakeVisible(&m_expressionLabel);
     setLookAndFeel(&m_lookAndFeel);
     addAndMakeVisible(&m_graphing);
 
diff --git a/Source/PluginProcessor.cpp b/Source/PluginProcessor.cpp
index 4ef7c15..e9753a9 100644
--- a/Source/PluginProcessor.cpp
+++ b/Source/PluginProcessor.cpp
@@ -25,8 +25,7 @@ TransferAudioProcessor::TransferAudioProcessor()
 #else 
     : 
 #endif
-    parameterTree(*this, nullptr, juce::Identifier("Transfer"), createParameterLayout()), m_distortion(parameterTree),
-    m_oversampler(2, m_oversamplingFactor, juce::dsp::Oversampling<float>::filterHalfBandFIREquiripple)
+    parameterTree(*this, nullptr, juce::Identifier("Transfer"), createParameterLayout()), m_distortion(parameterTree)
 {
     ErrorReporter::init();
     //context.reset(new Expression<float>("x", 0, 0));
@@ -113,10 +112,10 @@ void TransferAudioProcessor::changeProgramName (int index, const juce::String& n
 //==============================================================================
 void TransferAudioProcessor::prepareToPlay (double sampleRate, int samplesPerBlock)
 {
-    m_oversampler.reset();
-    m_oversampler.setUsingIntegerLatency(true);
-    m_oversampler.initProcessing(samplesPerBlock);
-    setLatencySamples(m_oversampler.getLatencyInSamples());
+    m_oversampler.reset(new juce::dsp::Oversampling<float>(getTotalNumOutputChannels(), m_oversamplingFactor, juce::dsp::Oversampling<float>::filterHalfBandFIREquiripple));
+    m_oversampler->setUsingIntegerLatency(true);
+    m_oversampler->initProcessing(samplesPerBlock);
+    setLatencySamples(m_oversampler->getLatencyInSamples());
     m_distortion.prepareToPlay(samplesPerBlock, sampleRate * m_oversamplingFactor);
 }
 
@@ -155,9 +154,9 @@ void TransferAudioProcessor::processBlock (juce::AudioBuffer<float>& buffer, juc
     auto totalNumInputChannels  = getTotalNumInputChannels();
     auto totalNumOutputChannels = getTotalNumOutputChannels();
     juce::dsp::AudioBlock<float> block{ buffer };
-    auto oversampled = m_oversampler.processSamplesUp(block);
+    auto oversampled = m_oversampler->processSamplesUp(block);
     m_distortion.getNextAudioBlock(oversampled);
-    m_oversampler.processSamplesDown(block);
+    m_oversampler->processSamplesDown(block);
 }
 
 //==============================================================================
diff --git a/Source/PluginProcessor.h b/Source/PluginProcessor.h
index 6d575fb..014b4d5 100644
--- a/Source/PluginProcessor.h
+++ b/Source/PluginProcessor.h
@@ -66,7 +66,7 @@ class TransferAudioProcessor  : public juce::AudioProcessor, public juce::AudioP
     const size_t m_oversamplingFactor{ 4 }; // 16x
     juce::AudioProcessorValueTreeState::ParameterLayout createParameterLayout() noexcept;
     juce::AudioProcessorValueTreeState parameterTree;
-    juce::dsp::Oversampling<float> m_oversampler;
+    std::unique_ptr<juce::dsp::Oversampling<float> > m_oversampler{ nullptr };
     std::unique_ptr<Expression<float>> context;
     Transfer::Audio::Distortion m_distortion;
     double currentCoefficient = 1;
diff --git a/Source/UI/LF.h b/Source/UI/LF.h
index d17a2a2..c3e2eba 100644
--- a/Source/UI/LF.h
+++ b/Source/UI/LF.h
@@ -81,7 +81,7 @@ class TitleLF : public juce::LookAndFeel_V4
 public:
     TitleLF()
     {
-        setColour(juce::Label::ColourIds::textColourId, juce::Colour(0x237F7F7F));
+        setColour(juce::Label::ColourIds::textColourId, juce::Colour(0xFFA0A0A0));
     }
 
     ~TitleLF() override { }
diff --git a/Source/UI/TransferCodeEditor.h b/Source/UI/TransferCodeEditor.h
index 22ad24a..993ef80 100644
--- a/Source/UI/TransferCodeEditor.h
+++ b/Source/UI/TransferCodeEditor.h
@@ -14,8 +14,8 @@
 class TransferCodeEditor : public juce::CodeEditorComponent
 {
 public: 
-    TransferCodeEditor(juce::CodeDocument& document, juce::CodeTokeniser* tokeniser) : 
-        juce::CodeEditorComponent(document, tokeniser), m_tokeniser(tokeniser)
+    TransferCodeEditor(juce::CodeDocument& document, juce::CodeTokeniser* tokeniser) :
+        juce::CodeEditorComponent(document, tokeniser), m_tokeniser(tokeniser), m_inErrorMode(false)
     {
         
         setFont(LF::createFont());
@@ -82,6 +82,7 @@ class TransferCodeEditor : public juce::CodeEditorComponent
 
     void toggleErrorMode(bool hasError, const juce::String& errorText = "")
     {
+        if (m_inErrorMode == hasError) return;
         auto font = getFont();
         font.setUnderline(hasError);
         setFont(font);
@@ -91,10 +92,12 @@ class TransferCodeEditor : public juce::CodeEditorComponent
             m_errorRenderer.reset(new ErrorRenderer(errorText));
             addAndMakeVisible(m_errorRenderer.get());
             m_errorRenderer->setBounds(getLocalBounds());
+            m_inErrorMode = true;
         }
         else {
             removeChildComponent(m_errorRenderer.get());
             m_errorRenderer.reset(nullptr);
+            m_inErrorMode = false;
         }
     }
 private: 
@@ -112,5 +115,5 @@ class TransferCodeEditor : public juce::CodeEditorComponent
     private: 
         juce::String m_errorText;
     }; std::unique_ptr<ErrorRenderer> m_errorRenderer{ nullptr };
-
+    bool m_inErrorMode{ false };
 };
\ No newline at end of file