diff --git a/src/extra_features.h b/src/extra_features.h
index 14792a8..d982388 100644
--- a/src/extra_features.h
+++ b/src/extra_features.h
@@ -71,4 +71,4 @@ inline long long int getElapseTime(std::string marker = "")
 #define LAP_TIME(marker)
 #define LOG_LAP_TIME(marker)
 
-#endif
\ No newline at end of file
+#endif
diff --git a/src/fx.cpp b/src/fx.cpp
index f879cc8..fd828b3 100644
--- a/src/fx.cpp
+++ b/src/fx.cpp
@@ -32,8 +32,3 @@ FX::FX(float32_t sampling_rate) :
 FX::~FX()
 {
 }
-
-void FXBase::prepare()
-{
-    // does nothing by default
-}
diff --git a/src/fx.h b/src/fx.h
index ec23ad5..e3cef1d 100644
--- a/src/fx.h
+++ b/src/fx.h
@@ -22,7 +22,7 @@
 #include <arm_math.h>
 #include "common.h"
 
-#include "extra_features.h"
+#include "fx_base.h"
 
 class FXBase
 {
@@ -30,13 +30,13 @@ class FXBase
     
 protected:
     FXBase(float32_t sampling_rate);
-    virtual ~FXBase();
 
 public:
+    virtual ~FXBase();
+    
     float32_t getSamplingRate() const;
 
     virtual void reset() = 0;
-    virtual void prepare();
 
 private:
     const float32_t SamplingRate;
diff --git a/src/fx_base.h b/src/fx_base.h
new file mode 100644
index 0000000..ec6f135
--- /dev/null
+++ b/src/fx_base.h
@@ -0,0 +1,10 @@
+#pragma once
+
+#include "extra_features.h"
+
+enum StereoChannels
+{
+    Left = 0,
+    Right,
+    kNumChannels
+};
diff --git a/src/fx_chorus.cpp b/src/fx_chorus.cpp
index edfa683..6fc1687 100644
--- a/src/fx_chorus.cpp
+++ b/src/fx_chorus.cpp
@@ -44,7 +44,7 @@ void Chorus::reset()
 void Chorus::processSample(float32_t inL, float32_t inR, float32_t& outL, float32_t& outR)
 {
     typedef Engine::Reserve<2047> Memory;
-    Engine::DelayLine<Memory, 0> line;
+    static Engine::DelayLine<Memory, 0> line;
     Engine::Context c;
 
     this->engine_.start(&c);
diff --git a/src/fx_dry.cpp b/src/fx_dry.cpp
index 5274d91..1c49794 100644
--- a/src/fx_dry.cpp
+++ b/src/fx_dry.cpp
@@ -11,7 +11,7 @@ Dry::~Dry()
 
 void Dry::reset()
 {
-    // does nothing
+    // nothing to be done
 }
 
 void Dry::processSample(float32_t inL, float32_t inR, float32_t& outL, float32_t& outR)
diff --git a/src/fx_engine.hpp b/src/fx_engine.hpp
index 662ca01..2827ff4 100644
--- a/src/fx_engine.hpp
+++ b/src/fx_engine.hpp
@@ -1,21 +1,22 @@
 #pragma once
 
-#include "fx_components.h"
+#if defined(DEBUG)
+#include <iostream>
+#include <cmath>
+#endif
 
 #include <algorithm>
 #include <climits>
 #include <cassert>
 
-#define MAKE_INTEGRAL_FRACTIONAL(x) \
-    int32_t x ## _integral = static_cast<int32_t>(x); \
-    float32_t x ## _fractional = x - static_cast<float32_t>(x ## _integral);
+#include "fx_components.h"
 
 enum Format
 {
-    FORMAT_FLOAT32,
     FORMAT_12_BIT,
     FORMAT_16_BIT,
-    FORMAT_32_BIT
+    FORMAT_32_BIT,
+    FORMAT_FLOAT32
 };
 
 template <Format format>
@@ -39,66 +40,66 @@ inline int16_t clip16(int32_t x)
 }
 
 template <>
-struct DataType<Format::FORMAT_FLOAT32>
+struct DataType<Format::FORMAT_12_BIT>
 {
-    typedef float32_t T;
+    typedef uint16_t T;
 
     static inline float32_t decompress(T value)
     {
-        return value;
+        return static_cast<float>(static_cast<int16_t>(value)) / 4096.0f;
     }
 
     static inline T compress(float32_t value)
     {
-        return constrain(value, -1.0f, 1.0f);
+        return clip16(static_cast<int32_t>(value * 4096.0f));
     }
 };
 
 template <>
-struct DataType<Format::FORMAT_12_BIT>
+struct DataType<Format::FORMAT_16_BIT>
 {
-    typedef uint16_t T;
+    typedef uint32_t T;
 
     static inline float32_t decompress(T value)
     {
-        return static_cast<float>(static_cast<int16_t>(value)) / 4096.0f;
+        return static_cast<float32_t>(static_cast<int16_t>(value)) / 65536.0f;
     }
 
     static inline T compress(float32_t value)
     {
-        return clip16(static_cast<int32_t>(value * 4096.0f));
+        return clip16(static_cast<int32_t>(value * 65536.0f));
     }
 };
 
 template <>
-struct DataType<Format::FORMAT_16_BIT>
+struct DataType<Format::FORMAT_32_BIT>
 {
     typedef uint32_t T;
 
     static inline float32_t decompress(T value)
     {
-        return static_cast<float32_t>(static_cast<int16_t>(value)) / 65536.0f;
+        return static_cast<float32_t>(static_cast<int64_t>(value)) / static_cast<float32_t>(UINT32_MAX);
     }
 
     static inline T compress(float32_t value)
     {
-        return clip16(static_cast<int32_t>(value * 65536.0f));
+        return value * static_cast<float32_t>(INT32_MAX);
     }
 };
 
 template <>
-struct DataType<Format::FORMAT_32_BIT>
+struct DataType<Format::FORMAT_FLOAT32>
 {
-    typedef uint32_t T;
+    typedef float32_t T;
 
     static inline float32_t decompress(T value)
     {
-        return static_cast<float32_t>(static_cast<int64_t>(value)) / static_cast<float32_t>(UINT32_MAX);
+        return value;
     }
 
     static inline T compress(float32_t value)
     {
-        return value * static_cast<float32_t>(INT32_MAX);
+        return constrain(value, -1.0f, 1.0f);
     }
 };
 
@@ -307,10 +308,14 @@ public:
         inline void interpolate(D& d, float32_t offset, float32_t scale)
         {
             assert((D::base + D::length) <= size);
-            MAKE_INTEGRAL_FRACTIONAL(offset);
+
+            int32_t offset_integral = static_cast<int32_t>(offset);
+            float32_t offset_fractional = offset - static_cast<float32_t>(offset_integral);
+
             float32_t a = DataType<format>::decompress(this->buffer_[(this->write_ptr_ + offset_integral + D::base) & MASK]);
             float32_t b = DataType<format>::decompress(this->buffer_[(this->write_ptr_ + offset_integral + D::base + 1) & MASK]);
             float32_t x = a + (b - a) * offset_fractional;
+
             this->previous_read_ = x;
             this->accumulator_ += x * scale;
         }
@@ -318,15 +323,9 @@ public:
         template <typename D>
         inline void interpolate(D& d, float32_t offset, LFOIndex index, float32_t amplitude, float32_t scale)
         {
-            assert((D::base + D::length) <= size);
             assert(index < LFOIndex::kLFOCount);
-            offset += amplitude * this->lfo_value_[index];
-            MAKE_INTEGRAL_FRACTIONAL(offset);
-            float32_t a = DataType<format>::decompress(this->buffer_[(this->write_ptr_ + offset_integral + D::base) & MASK]);
-            float32_t b = DataType<format>::decompress(this->buffer_[(this->write_ptr_ + offset_integral + D::base + 1) & MASK]);
-            float32_t x = a + (b - a) * offset_fractional;
-            this->previous_read_ = x;
-            this->accumulator_ += x * scale;
+
+            this->interpolate(d, offset + amplitude * this->lfo_value_[index], scale);
         }
 
     private:
@@ -355,7 +354,7 @@ public:
         }
     }
 
-    inline void start(Context *c)
+    inline void start(Context* c)
     {
         --this->write_ptr_;
         if(this->write_ptr_ < 0)
diff --git a/src/fx_flanger.cpp b/src/fx_flanger.cpp
index 8b53970..67aff97 100644
--- a/src/fx_flanger.cpp
+++ b/src/fx_flanger.cpp
@@ -25,8 +25,10 @@ Flanger::~Flanger()
     delete[] this->delay_lineL_;
     delete[] this->delay_lineR_;
 
-    delete this->lfo_[LFOIndex::LFO_L];
-    delete this->lfo_[LFOIndex::LFO_R];
+    for(unsigned i = 0; i < LFOIndex::kLFOCount; ++i)
+    {
+        delete this->lfo_[i];
+    }
 }
 
 inline float32_t linearIterpolationnterp(float32_t inX, float32_t inY, float32_t inPhase)
@@ -41,8 +43,10 @@ void Flanger::reset()
     memset(this->feedback_samples_, 0, 2 * sizeof(float32_t));
     this->write_index_ = 0;
 
-    this->lfo_[LFOIndex::LFO_L]->reset();
-    this->lfo_[LFOIndex::LFO_R]->reset();
+    for(unsigned i = 0; i < LFOIndex::kLFOCount; ++i)
+    {
+        this->lfo_[i]->reset();
+    }
 }
 
 void Flanger::processSample(float32_t inL, float32_t inR, float32_t& outL, float32_t& outR)
@@ -58,8 +62,8 @@ void Flanger::processSample(float32_t inL, float32_t inR, float32_t& outL, float
     }
 
     // Configure LFO for effect processing
-    float32_t lfo_l = this->lfo_[LFO_L]->process() * this->depth_;
-    float32_t lfo_r = this->lfo_[LFO_R]->process() * this->depth_;
+    float32_t lfo_l = this->lfo_[LFOIndex::LFO_L]->process() * this->depth_;
+    float32_t lfo_r = this->lfo_[LFOIndex::LFO_R]->process() * this->depth_;
 
     // Map LFO range to millisecond range according to Chorus or Flanger effect
 	float32_t lfoMappedL = mapfloat(lfo_l, -1.0f, 1.0f, 0.001f, 0.005f);
@@ -104,8 +108,8 @@ void Flanger::processSample(float32_t inL, float32_t inR, float32_t& outL, float
     float32_t delay_sample_r = linearIterpolationnterp(this->delay_lineR_[currentR], this->delay_lineR_[nextR], fractionR);
 
     // Store delayed samples as feedback
-    this->feedback_samples_[0] = delay_sample_l * this->feedback_;
-    this->feedback_samples_[1] = delay_sample_r * this->feedback_;
+    this->feedback_samples_[StereoChannels::Left ] = delay_sample_l * this->feedback_;
+    this->feedback_samples_[StereoChannels::Right] = delay_sample_r * this->feedback_;
 
     outL = delay_sample_l;
     outR = delay_sample_r;
diff --git a/src/fx_flanger.h b/src/fx_flanger.h
index c0b3fb9..a8a6025 100644
--- a/src/fx_flanger.h
+++ b/src/fx_flanger.h
@@ -30,7 +30,8 @@ public:
     enum LFOIndex
     {
         LFO_L = 0,
-        LFO_R
+        LFO_R,
+        kLFOCount
     };
 
     Flanger(float32_t sampling_rate, float32_t rate = 0.5f, float32_t depth = 0.5f, float32_t feedback = 0.0f);
@@ -53,9 +54,9 @@ private:
     float32_t* delay_lineL_;
     float32_t* delay_lineR_;
     unsigned write_index_;
-    float32_t feedback_samples_[2];
+    float32_t feedback_samples_[StereoChannels::kNumChannels];
 
-    LFO* lfo_[2];
+    LFO* lfo_[LFOIndex::kLFOCount];
     float32_t depth_;           // Depth of the flanger effect in milliseconds (0.0 - 10.0)
     float32_t feedback_;        // Amount of feedback to apply to the delay line
 };
\ No newline at end of file
diff --git a/src/fx_orbitone.h b/src/fx_orbitone.h
index 986c0df..06ab899 100644
--- a/src/fx_orbitone.h
+++ b/src/fx_orbitone.h
@@ -58,4 +58,4 @@ private:
     float32_t fullscale_depth_;
 
     LFO* lfo_[LFOIndex::kLFOCount];
-};
\ No newline at end of file
+};
diff --git a/src/fx_phaser.cpp b/src/fx_phaser.cpp
index 06d5ea3..389d344 100644
--- a/src/fx_phaser.cpp
+++ b/src/fx_phaser.cpp
@@ -80,8 +80,8 @@ void Phaser::processSample(float32_t inL, float32_t inR, float32_t& outL, float3
     this->z_[0] = sampleL;
     this->z_[1] = sampleR;
 
-    outL = inL + this->z_[0] * this->depth_;
-    outR = inR + this->z_[1] * this->depth_;
+    outL = inL + this->z_[StereoChannels::Left ] * this->depth_;
+    outR = inR + this->z_[StereoChannels::Right] * this->depth_;
 }
 
 void Phaser::setFrequencyRange(float32_t min_frequency, float32_t max_frequency)
diff --git a/src/fx_phaser.h b/src/fx_phaser.h
index 0391379..ce04570 100644
--- a/src/fx_phaser.h
+++ b/src/fx_phaser.h
@@ -42,7 +42,7 @@ public:
 
     private:
         float32_t a1_;
-        float32_t z_[2];
+        float32_t z_[StereoChannels::kNumChannels];
     };
 
     Phaser(float32_t sampling_rate, float32_t rate = 0.5f, float32_t depth = 1.0f, float32_t feedback = 0.7f, unsigned nb_stages = 12);
@@ -73,5 +73,5 @@ private:
     float32_t dmax_;
     unsigned nb_stages_;
     AllpassDelay stages_[MAX_NB_PHASES];
-    float32_t z_[2];
+    float32_t z_[StereoChannels::kNumChannels];
 };
\ No newline at end of file
diff --git a/src/fx_rack.cpp b/src/fx_rack.cpp
index 8ddbc70..b08e964 100644
--- a/src/fx_rack.cpp
+++ b/src/fx_rack.cpp
@@ -50,7 +50,7 @@ inline void FXRack::reset()
 
 inline void FXRack::processSample(float32_t inL, float32_t inR, float32_t& outL, float32_t& outR)
 {
-    auto end = this->fx_chain_.end();
+    FXChain::iterator end = this->fx_chain_.end();
     for(FXChain::iterator it = this->fx_chain_.begin(); it != end; it++)
     {
         (*it)->processSample(inL, inR, outL, outR);
@@ -60,19 +60,8 @@ inline void FXRack::processSample(float32_t inL, float32_t inR, float32_t& outL,
     }
 }
 
-void FXRack::prepare()
-{
-    auto end = this->fx_chain_.end();
-    for(FXChain::iterator it = this->fx_chain_.begin(); it != end; it++)
-    {
-        (*it)->prepare();
-    }
-}
-
 void FXRack::process(float32_t* left_input, float32_t* right_input, float32_t* left_output, float32_t* right_output, size_t nSamples)
 {
-    this->prepare();
-
     float32_t sampleInL;
     float32_t sampleInR;
     float32_t sampleOutL;
diff --git a/src/fx_rack.h b/src/fx_rack.h
index 5def0f5..859a96a 100644
--- a/src/fx_rack.h
+++ b/src/fx_rack.h
@@ -19,7 +19,6 @@
 #pragma once
 
 #include "fx.h"
-#include "fx_unit.hpp"
 #include "fx_tube.h"
 #include "fx_chorus.h"
 #include "fx_flanger.h"
@@ -27,6 +26,7 @@
 #include "fx_phaser.h"
 #include "fx_delay.h"
 #include "fx_shimmer_reverb.h"
+#include "fx_unit.hpp"
 
 #include <vector>
 
@@ -42,7 +42,6 @@ public:
 
     virtual void reset() override;
     virtual inline void processSample(float32_t inL, float32_t inR, float32_t& outL, float32_t& outR) override;
-    virtual void prepare() override;
     virtual void process(float32_t* left_input, float32_t* right_input, float32_t* left_output, float32_t* right_output, size_t nSamples) override;
 
     void setEnable(bool enable = true);
diff --git a/src/fx_svf.h b/src/fx_svf.h
index 8866a6e..b340451 100644
--- a/src/fx_svf.h
+++ b/src/fx_svf.h
@@ -19,7 +19,6 @@
 //
 
 #include "fx.h"
-#include "mixing_console_constants.h"
 
 class StateVariableFilter : public FXElement
 {
diff --git a/src/fx_tube.cpp b/src/fx_tube.cpp
index 69b2775..d01fd96 100644
--- a/src/fx_tube.cpp
+++ b/src/fx_tube.cpp
@@ -17,7 +17,7 @@ Tube::~Tube()
 
 void Tube::reset()
 {
-    // does nothing
+    // nothing to be done
 }
 
 void Tube::processSample(float32_t inL, float32_t inR, float32_t& outL, float32_t& outR)
diff --git a/src/mixing_console.hpp b/src/mixing_console.hpp
index 03896a5..0dd0bcb 100644
--- a/src/mixing_console.hpp
+++ b/src/mixing_console.hpp
@@ -34,7 +34,7 @@
 #include "fx_unit2.hpp"
 
 #if defined(DEBUG)
-typedef void (*ValueInpector)(const std::string&, size_t, const float32_t);
+typedef size_t (*ValueInpector)(const std::string&, size_t, const float32_t);
 #endif
 
 template<size_t nb_inputs>
@@ -47,40 +47,39 @@ public:
     ~MixingConsole();
 
     // Send section
-    void setChannelLevel(size_t in, float32_t lvl);
-    void setPan(size_t in, float32_t pan);
-    void setSendLevel(size_t in, MixerOutput fx, float32_t lvl);
-    void setInputSample(size_t in, float32_t sampleL, float32_t sampleR);
-    void setInputSampleBuffer(size_t in, float32_t* samples);
-    void setInputSampleBuffer(size_t in, float32_t* samplesL, float32_t* samplesR);
+    inline void setChannelLevel(size_t in, float32_t lvl);
+    inline void setPan(size_t in, float32_t pan);
+    inline void setSendLevel(size_t in, MixerOutput fx, float32_t lvl);
+    inline void setInputSample(size_t in, float32_t sampleL, float32_t sampleR);
+    inline void setInputSampleBuffer(size_t in, float32_t* samples);
+    inline void setInputSampleBuffer(size_t in, float32_t* samplesL, float32_t* samplesR);
 
     // Return section
-    void setReturnLevel(MixerOutput ret, MixerOutput dest, float32_t lvl);
-    void setReturnSample(MixerOutput ret, float32_t sampleL, float32_t sampleR);
+    inline void setReturnLevel(MixerOutput ret, MixerOutput dest, float32_t lvl);
+    inline void setReturnSample(MixerOutput ret, float32_t sampleL, float32_t sampleR);
 
     // Get FX
-    FXElement* getFX(size_t fx);
-    FXUnit2<Tube>* getTube();
-    FXUnit2<Chorus>* getChorus();
-    FXUnit2<Flanger>* getFlanger();
-    FXUnit2<Orbitone>* getOrbitone();
-    FXUnit2<Phaser>* getPhaser();
-    FXUnit2<Delay>* getDelay();
-    FXUnit2<AudioEffectPlateReverb>* getPlateReverb();
-    FXUnit2<ShimmerReverb>* getShimmerReverb();
-    FXUnit2<Dry>* getDry();
+    inline FXElement* getFX(size_t fx);
+    inline FXUnit2<Tube>* getTube();
+    inline FXUnit2<Chorus>* getChorus();
+    inline FXUnit2<Flanger>* getFlanger();
+    inline FXUnit2<Orbitone>* getOrbitone();
+    inline FXUnit2<Phaser>* getPhaser();
+    inline FXUnit2<Delay>* getDelay();
+    inline FXUnit2<AudioEffectPlateReverb>* getPlateReverb();
+    inline FXUnit2<ShimmerReverb>* getShimmerReverb();
+    inline FXUnit2<Dry>* getDry();
 
     // Processing
-    void init();
-    void reset();
-    void processSample(float32_t& outL, float32_t& outR);
-    void prepare();
+    inline void init();
+    inline void reset();
+    inline void processSample(float32_t& outL, float32_t& outR);
     void process(float32_t* outL, float32_t* outR);
 
 protected:
-    void updatePan(size_t in);
-    void setLevel(size_t in, MixerOutput fx, float32_t lvl);
-    void setSample(size_t in, float32_t sampleL, float32_t sampleR);
+    inline void updatePan(size_t in);
+    inline void setLevel(size_t in, MixerOutput fx, float32_t lvl);
+    inline void setSample(size_t in, float32_t sampleL, float32_t sampleR);
 
 private:
     const size_t BufferSize;
@@ -105,7 +104,7 @@ private:
 #if defined(DEBUG)
 public:
     void dump(std::ostream& out, const std::string& key = "") const;
-    void inspect(ValueInpector inspector, bool checkInputBuffer = false) const;
+    size_t inspect(ValueInpector inspector, bool checkInputBuffer = false) const;
 #endif
 };
 
@@ -119,12 +118,10 @@ MixingConsole<nb_inputs>::MixingConsole(float32_t sampling_rate, size_t buffer_s
     {
         this->input_sample_buffer_[StereoChannels::Left ][i] = new float32_t[this->BufferSize];
         this->input_sample_buffer_[StereoChannels::Right][i] = new float32_t[this->BufferSize];
-        memset(this->input_sample_buffer_[StereoChannels::Left ][i], 0, this->BufferSize);
-        memset(this->input_sample_buffer_[StereoChannels::Right][i], 0, this->BufferSize);
+        memset(this->input_sample_buffer_[StereoChannels::Left ][i], 0, sizeof(float32_t) * this->BufferSize);
+        memset(this->input_sample_buffer_[StereoChannels::Right][i], 0, sizeof(float32_t) * this->BufferSize);
     }
 
-    memset(this->fx_, 0, MixerOutput::kFXCount * sizeof(FXElement*));
-
     this->fx_[MixerOutput::FX_Tube] = this->tube_ = new FXUnit2<Tube>(sampling_rate);
     this->fx_[MixerOutput::FX_Chorus] = this->chorus_ = new FXUnit2<Chorus>(sampling_rate);
     this->fx_[MixerOutput::FX_Flanger] = this->flanger_ = new FXUnit2<Flanger>(sampling_rate);
@@ -395,20 +392,9 @@ void MixingConsole<nb_inputs>::processSample(float32_t& outL, float32_t& outR)
     outR = fx_inputs_[MixerOutput::MainOutput][StereoChannels::Right];
 }
 
-template<size_t nb_inputs>
-void MixingConsole<nb_inputs>::prepare()
-{
-    for(size_t i = 0; i < MixerOutput::kFXCount; ++i)
-    {
-        this->fx_[i]->prepare();
-    }
-}
-
 template<size_t nb_inputs>
 void MixingConsole<nb_inputs>::process(float32_t* outL, float32_t* outR)
 {
-    this->prepare();
-
     for(size_t s = 0; s < this->BufferSize; ++s)
     {
         for(size_t in = 0; in < nb_inputs; ++in)
@@ -608,27 +594,29 @@ void MixingConsole<nb_inputs>::dump(std::ostream& out, const std::string& key) c
 #define DUMP2(mixer, out, tag) mixer->dump(cout, tag)
 
 template<size_t nb_inputs>
-void MixingConsole<nb_inputs>::inspect(ValueInpector inspector, bool checkInputBuffer) const
+size_t MixingConsole<nb_inputs>::inspect(ValueInpector inspector, bool checkInputBuffer) const
 {
+    size_t nb_errors = 0;
+
     for(size_t i = 0; i < nb_inputs; ++i)
     {
-        inspector("Level  ", i, this->channel_level_[i]);
-        inspector("Pan L  ", i, this->pan_[StereoChannels::Left][i]);
-        inspector("Pan R  ", i, this->pan_[StereoChannels::Right][i]);
-        inspector("Pan    ", i, this->pan_[StereoChannels::kNumChannels][i]);
+        nb_errors += inspector("Level  ", i, this->channel_level_[i]);
+        nb_errors += inspector("Pan L  ", i, this->pan_[StereoChannels::Left][i]);
+        nb_errors += inspector("Pan R  ", i, this->pan_[StereoChannels::Right][i]);
+        nb_errors += inspector("Pan    ", i, this->pan_[StereoChannels::kNumChannels][i]);
     }
 
     for(size_t i = 0; i < (nb_inputs + MixerOutput::kFXCount - 1); ++i)
     {
-        inspector("Input L", i, this->input_samples_[StereoChannels::Left ][i]);
-        inspector("Input R", i, this->input_samples_[StereoChannels::Right][i]);
+        nb_errors += inspector("Input L", i, this->input_samples_[StereoChannels::Left ][i]);
+        nb_errors += inspector("Input R", i, this->input_samples_[StereoChannels::Right][i]);
     }
 
     for(size_t c = 0; c < MixerOutput::kFXCount; ++c)
     {
         for(size_t i = 0; i < (nb_inputs + MixerOutput::kFXCount - 1); ++i)
         {
-            inspector("Levels ", c * 100 + i, this->levels_[c][i]);
+            nb_errors += inspector("Levels ", c * 100 + i, this->levels_[c][i]);
         }
     }
 
@@ -638,14 +626,16 @@ void MixingConsole<nb_inputs>::inspect(ValueInpector inspector, bool checkInputB
         {
             for(size_t k = 0; k < this->BufferSize; ++k)
             {
-                inspector("Buffer ", k * 100 + i, this->input_sample_buffer_[StereoChannels::Left ][i][k]);
-                inspector("Buffer ", k * 100 + i, this->input_sample_buffer_[StereoChannels::Right][i][k]);
+                nb_errors += inspector("Buffer ", k * 100 + i, this->input_sample_buffer_[StereoChannels::Left ][i][k]);
+                nb_errors += inspector("Buffer ", k * 100 + i, this->input_sample_buffer_[StereoChannels::Right][i][k]);
             }
         }
     }
+
+    return nb_errors;
 }
 
-#define INSPECT(mixer, inspector) mixer->inspect(inspector, true);
+#define INSPECT(mixer, inspector) mixer->inspect(inspector, true)
 
 #else
 
diff --git a/src/mixing_console_constants.h b/src/mixing_console_constants.h
index 0ee414b..bc771fe 100644
--- a/src/mixing_console_constants.h
+++ b/src/mixing_console_constants.h
@@ -6,13 +6,6 @@
 #include <cstring>
 #include <stdexcept>
 
-enum StereoChannels
-{
-    Left = 0,
-    Right,
-    kNumChannels
-};
-
 enum MixerOutput
 {
     OutputStart = 0,
diff --git a/src/test/test_fx_helper.h b/src/test/test_fx_helper.h
index d92a8a7..9a42bd0 100644
--- a/src/test/test_fx_helper.h
+++ b/src/test/test_fx_helper.h
@@ -7,7 +7,7 @@
 #include "../fx.h"
 #include "../mixing_console_constants.h"
 
-#define AUDIO_SOURCE_FILE "test.wav"
+#define AUDIO_SOURCE_FILE "test2.wav"
 
 #define SAMPLING_FREQUENCY 44100.0f
 
diff --git a/src/test/test_fx_rack.cpp b/src/test/test_fx_rack.cpp
index fcc6628..15a431a 100644
--- a/src/test/test_fx_rack.cpp
+++ b/src/test/test_fx_rack.cpp
@@ -12,67 +12,62 @@ using namespace std;
 #define MAX_SVF_SAMPLES 10000000
 #define MAX_NB_ERRORS 100
 
-void setupRack(FXRack* rack)
+void setupRack(FXRack* rack, int scenario)
 {
     rack->setWetLevel(1.0f);
 
+    rack->getTube()->setEnable(Active(scenario, FXSwitch::FX__Tube));
     rack->getTube()->setWetLevel(0.25f);
     rack->getTube()->setOverdrive(0.25f);
 
+    rack->getChorus()->setEnable(Active(scenario, FXSwitch::FX__Chorus));
     rack->getChorus()->setWetLevel(0.5f);
     rack->getChorus()->setRate(0.4f);
     rack->getChorus()->setDepth(0.5f);
     
-    rack->getPhaser()->setWetLevel(1.0f);
-    rack->getPhaser()->setRate(0.1f);
-    rack->getPhaser()->setDepth(1.0f);
-    rack->getPhaser()->setFeedback(0.5f);
-    rack->getPhaser()->setNbStages(12);
+    rack->getFlanger()->setEnable(Active(scenario, FXSwitch::FX__Flanger));
+    rack->getFlanger()->setWetLevel(0.5f);
+    rack->getFlanger()->setRate(0.03f);
+    rack->getFlanger()->setDepth(0.75f);
+    rack->getFlanger()->setFeedback(0.5f);
 
+    rack->getOrbitone()->setEnable(Active(scenario, FXSwitch::FX__Orbitone));
     rack->getOrbitone()->setWetLevel(0.8f);
     rack->getOrbitone()->setRate(0.4f);
     rack->getOrbitone()->setDepth(0.5f);
 
-    rack->getFlanger()->setWetLevel(0.5f);
-    rack->getFlanger()->setRate(0.03f);
-    rack->getFlanger()->setDepth(0.75f);
-    rack->getFlanger()->setFeedback(0.5f);
+    rack->getPhaser()->setEnable(Active(scenario, FXSwitch::FX__Phaser));
+    rack->getPhaser()->setWetLevel(1.0f);
+    rack->getPhaser()->setRate(0.1f);
+    rack->getPhaser()->setDepth(1.0f);
+    rack->getPhaser()->setFeedback(0.5f);
+    rack->getPhaser()->setNbStages(12);
 
+    rack->getDelay()->setEnable(Active(scenario, FXSwitch::FX__Delay));
     rack->getDelay()->setWetLevel(0.6f);
     rack->getDelay()->setLeftDelayTime(0.15f);
     rack->getDelay()->setLeftDelayTime(0.2f);
     rack->getDelay()->setFeedback(0.35f);
-    rack->getDelay()->setFlutterRate(0.15f);
-    rack->getDelay()->setFlutterAmount(0.75f);
+    rack->getDelay()->setFlutterRate(0.0f);
+    rack->getDelay()->setFlutterAmount(0.0f);
 
-    rack->getShimmerReverb()->setWetLevel(0.6f);
-    rack->getShimmerReverb()->setInputGain(0.55f);
+    rack->getShimmerReverb()->setEnable(Active(scenario, FXSwitch::FX__ShimmerReverb));
+    rack->getShimmerReverb()->setWetLevel(0.5f);
+    rack->getShimmerReverb()->setInputGain(0.35f);
     rack->getShimmerReverb()->setTime(0.89f);
     rack->getShimmerReverb()->setDiffusion(0.75f);
     rack->getShimmerReverb()->setLP(0.8f);
 }
 
-void activateRackFXUnitScenario(FXRack* rack, int scenario)
-{
-    rack->getTube()->setEnable(Active(scenario, FXSwitch::FX__Tube));
-    rack->getChorus()->setEnable(Active(scenario, FXSwitch::FX__Chorus));
-    rack->getPhaser()->setEnable(Active(scenario, FXSwitch::FX__Phaser));
-    rack->getOrbitone()->setEnable(Active(scenario, FXSwitch::FX__Orbitone));
-    rack->getFlanger()->setEnable(Active(scenario, FXSwitch::FX__Flanger));
-    rack->getDelay()->setEnable(Active(scenario, FXSwitch::FX__Delay));
-    rack->getShimmerReverb()->setEnable(Active(scenario, FXSwitch::FX__ShimmerReverb));
-}
-
 TEST_P(FXScenarioTest, FXRackResetAllScenarios)
 {
     FXRack *rack = new FXRack(SAMPLING_FREQUENCY);
-    rack->setEnable(true);
-    setupRack(rack);
-
-    int fxSwitch = GetParam();
-    activateRackFXUnitScenario(rack, fxSwitch);
 
+    int fxSwitch = this->GetParam();
+    rack->setEnable(true);
+    setupRack(rack, fxSwitch);
     rack->reset();
+
     delete rack;
 }
 
@@ -87,14 +82,11 @@ TEST_P(FXScenarioTest, ScenarioProcessing)
     memset(sampleOutR, 0, size * nbRepeats * sizeof(float32_t));
 
     FXRack *rack = new FXRack(SAMPLING_FREQUENCY);
-    rack->setEnable(true);
 
-    setupRack(rack);
-
-    rack->reset();
     int fxSwitch = this->GetParam();
-
-    activateRackFXUnitScenario(rack, fxSwitch);
+    rack->setEnable(true);
+    setupRack(rack, fxSwitch);
+    rack->reset();
 
     string name = getScenarioName(fxSwitch);
 
diff --git a/src/test/test_mixing_console.cpp b/src/test/test_mixing_console.cpp
index 2ba22bb..0befe27 100644
--- a/src/test/test_mixing_console.cpp
+++ b/src/test/test_mixing_console.cpp
@@ -6,16 +6,27 @@
 
 #include "../mixing_console.hpp"
 
-void normalizedValueInspector(const std::string& el, size_t idx, const float32_t value)
+size_t nanValueInspector(const std::string& el, size_t idx, const float32_t value)
 {
     if(std::isnan(value))
     {
-        std::cout << "NAN - " << el << " " << idx << " = " << value  << std::endl;
+        return 1u;
     }
-    else if(value != constrain(value, -1.0f, 1.0f))
+
+    return 0u;
+}
+
+size_t normalizedValueInspector(const std::string& el, size_t idx, const float32_t value)
+{
+    if(!std::isnan(value))
     {
-        std::cout << "OoB - " << el << " " << idx << " = " << value  << std::endl;
+        if(value != constrain(value, -1.0f, 1.0f))
+        {
+            return 1u;
+        }
     }
+
+    return 0u;
 }
 
 class MixingConsoleScenarioTest : public testing::TestWithParam<MixerOutput> {};
@@ -34,29 +45,36 @@ typedef MixingConsole<8> Mixer;
 
 void setupMixingConsoleFX(Mixer* mixer)
 {
+    mixer->getTube()->setMute(false);
     mixer->getTube()->setOverdrive(0.25f);
 
+    mixer->getChorus()->setMute(false);
     mixer->getChorus()->setRate(0.4f);
     mixer->getChorus()->setDepth(0.5f);
     
-    mixer->getPhaser()->setRate(0.1f);
-    mixer->getPhaser()->setDepth(1.0f);
-    mixer->getPhaser()->setFeedback(0.5f);
-    mixer->getPhaser()->setNbStages(12);
+    mixer->getFlanger()->setMute(false);
+    mixer->getFlanger()->setRate(0.03f);
+    mixer->getFlanger()->setDepth(0.75f);
+    mixer->getFlanger()->setFeedback(0.5f);
 
+    mixer->getOrbitone()->setMute(false);
     mixer->getOrbitone()->setRate(0.4f);
     mixer->getOrbitone()->setDepth(0.5f);
 
-    mixer->getFlanger()->setRate(0.03f);
-    mixer->getFlanger()->setDepth(0.75f);
-    mixer->getFlanger()->setFeedback(0.5f);
+    mixer->getPhaser()->setMute(false);
+    mixer->getPhaser()->setRate(0.1f);
+    mixer->getPhaser()->setDepth(1.0f);
+    mixer->getPhaser()->setFeedback(0.5f);
+    mixer->getPhaser()->setNbStages(12);
 
+    mixer->getDelay()->setMute(false);
     mixer->getDelay()->setLeftDelayTime(0.5f);
     mixer->getDelay()->setLeftDelayTime(0.7f);
     mixer->getDelay()->setFeedback(0.7f);
     mixer->getDelay()->setFlutterRate(0.7f);
     mixer->getDelay()->setFlutterAmount(0.7f);
 
+    mixer->getPlateReverb()->setMute(false);
     mixer->getPlateReverb()->set_bypass(false);
     mixer->getPlateReverb()->size(0.7f);
     mixer->getPlateReverb()->hidamp(0.5f);
@@ -65,6 +83,7 @@ void setupMixingConsoleFX(Mixer* mixer)
     mixer->getPlateReverb()->diffusion(0.65f);
     mixer->getPlateReverb()->level(1.0f);
 
+    mixer->getShimmerReverb()->setMute(false);
     mixer->getShimmerReverb()->setInputGain(0.65f);
     mixer->getShimmerReverb()->setTime(0.89f);
     mixer->getShimmerReverb()->setDiffusion(0.75f);
@@ -96,20 +115,23 @@ TEST(MixingConsole, DryProcessing)
     mixer->setChannelLevel(0, 1.0f);
     mixer->setPan(0, 0.5f);
     mixer->setSendLevel(0, MixerOutput::MainOutput, 1.0f);
-    DUMP2(mixer, std::cout, "Post setup");
+    EXPECT_EQ(0, INSPECT(mixer, nanValueInspector));
+    EXPECT_EQ(0, INSPECT(mixer, normalizedValueInspector));
 
     float32_t in[length] = {0.1, 0.2};
     float32_t out[StereoChannels::kNumChannels][length];
     for(size_t i = 0; i < StereoChannels::kNumChannels; ++i) memset(out[i], 0, length * sizeof(float32_t));
 
     mixer->setInputSampleBuffer(0, in);
-    DUMP2(mixer, std::cout, "Post input injection");
+    EXPECT_EQ(0, INSPECT(mixer, nanValueInspector));
+    EXPECT_EQ(0, INSPECT(mixer, normalizedValueInspector));
 
     mixer->process(
         out[StereoChannels::Left ],
         out[StereoChannels::Right]
     );
-    DUMP2(mixer, std::cout, "Post processing");
+    EXPECT_EQ(0, INSPECT(mixer, nanValueInspector));
+    EXPECT_EQ(0, INSPECT(mixer, normalizedValueInspector));
 
     EXPECT_EQ(out[StereoChannels::Left ][0], out[StereoChannels::Right][0]);
     EXPECT_EQ(out[StereoChannels::Left ][1], out[StereoChannels::Right][1]);
@@ -132,27 +154,40 @@ TEST(MixingConsole, ShimmerProcessing)
     mixer->setReturnLevel(MixerOutput::FX_ShimmerReverb, MixerOutput::MainOutput, 1.0f);
     mixer->setChannelLevel(0, 1.0f);
     mixer->setPan(0, 0.5f);
+    EXPECT_EQ(0, INSPECT(mixer, nanValueInspector));
+    EXPECT_EQ(0, INSPECT(mixer, normalizedValueInspector));
+
 
     float32_t in[length] = {0.1, 0.2};
     float32_t out1[StereoChannels::kNumChannels][length];
     for(size_t i = 0; i < StereoChannels::kNumChannels; ++i) memset(out1[i], 0, length * sizeof(float32_t));
 
     mixer->setInputSampleBuffer(0, in);
+    EXPECT_EQ(0, INSPECT(mixer, nanValueInspector));
+    EXPECT_EQ(0, INSPECT(mixer, normalizedValueInspector));
 
     mixer->process(
         out1[StereoChannels::Left ],
         out1[StereoChannels::Right]
     );
+    EXPECT_EQ(0, INSPECT(mixer, nanValueInspector));
+    EXPECT_EQ(0, INSPECT(mixer, normalizedValueInspector));
 
     mixer->reset();
+    EXPECT_EQ(0, INSPECT(mixer, nanValueInspector));
+    EXPECT_EQ(0, INSPECT(mixer, normalizedValueInspector));
 
     float32_t out2[StereoChannels::kNumChannels][length];
     mixer->setInputSampleBuffer(0, in);
+    EXPECT_EQ(0, INSPECT(mixer, nanValueInspector));
+    EXPECT_EQ(0, INSPECT(mixer, normalizedValueInspector));
 
     mixer->process(
         out2[StereoChannels::Left ],
         out2[StereoChannels::Right]
     );
+    EXPECT_EQ(0, INSPECT(mixer, nanValueInspector));
+    EXPECT_EQ(0, INSPECT(mixer, normalizedValueInspector));
 
     EXPECT_EQ(out1[StereoChannels::Left ][0], out2[StereoChannels::Left ][0]);
     EXPECT_EQ(out1[StereoChannels::Right][0], out2[StereoChannels::Right][0]);
@@ -174,7 +209,8 @@ TEST(MixingConsole, ShimmerNoiseProcessing)
     mixer->setReturnLevel(MixerOutput::FX_ShimmerReverb, MixerOutput::MainOutput, 1.0f);
     mixer->setChannelLevel(0, 1.0f);
     mixer->setPan(0, 0.5f);
-    INSPECT(mixer, normalizedValueInspector);
+    EXPECT_EQ(0, INSPECT(mixer, nanValueInspector));
+    EXPECT_EQ(0, INSPECT(mixer, normalizedValueInspector));
 
     float32_t in[length];
     for(size_t i = 0; i < length; ++i) in[i] = getRandomValue();
@@ -183,20 +219,22 @@ TEST(MixingConsole, ShimmerNoiseProcessing)
     for(size_t i = 0; i < StereoChannels::kNumChannels; ++i) memset(out[i], 0, length * sizeof(float32_t));
 
     mixer->setInputSampleBuffer(0, in);
-    INSPECT(mixer, normalizedValueInspector);
+    EXPECT_EQ(0, INSPECT(mixer, nanValueInspector));
+    EXPECT_EQ(0, INSPECT(mixer, normalizedValueInspector));
 
     mixer->process(
         out[StereoChannels::Left ],
         out[StereoChannels::Right]
     );
-    INSPECT(mixer, normalizedValueInspector);
+    EXPECT_EQ(0, INSPECT(mixer, nanValueInspector));
+    EXPECT_EQ(0, INSPECT(mixer, normalizedValueInspector));
 
     delete mixer;
 }
 
 TEST(MixingConsole, SimpleProcessing)
 {
-    const unsigned nbRepeats = 4;
+    const unsigned nbRepeats = 2;
     unsigned size;
     float32_t** samples = readWaveFile(AUDIO_SOURCE_FILE, size);
     float32_t* sampleOutL = new float32_t[size * nbRepeats];
@@ -228,6 +266,8 @@ TEST(MixingConsole, SimpleProcessing)
     {
         mixer->setInputSampleBuffer(0, samples[0], samples[1]);
         mixer->process(sampleOutL + j * size, sampleOutR + j * size);
+        EXPECT_EQ(0, INSPECT(mixer, nanValueInspector));
+        EXPECT_EQ(0, INSPECT(mixer, normalizedValueInspector));
     }
     saveWaveFile(getResultFile("result-mixing-console.wav"), sampleOutL, sampleOutR, nbRepeats * size, static_cast<unsigned>(SAMPLING_FREQUENCY), 16);