diff --git a/inc/BandPassFilter.h b/inc/BandPassFilter.h
deleted file mode 100644
index e2c0fd0..0000000
--- a/inc/BandPassFilter.h
+++ /dev/null
@@ -1,17 +0,0 @@
-#pragma once
-
-#include "Filter.h"
-
-class BandPassFilter : public Filter {
-  protected:
-    float GetSampleForFilterType() override;
-
-  public:
-    BandPassFilter();
-    BandPassFilter(Filter* filter);
-    BandPassFilter(float freq, float res, float q);
-    ~BandPassFilter();
-    bool IsSameFilterType(FilterType type) override { return type == BandPass; };
-};
-
-
diff --git a/inc/Filter.h b/inc/Filter.h
index 2307f1c..f87dac3 100644
--- a/inc/Filter.h
+++ b/inc/Filter.h
@@ -34,3 +34,39 @@ class Filter : public IEffect {
     float GetPeakGain() { return m_drive; }
     virtual bool IsSameFilterType(FilterType type) { return false; };
 };
+
+class BandPassFilter : public Filter {
+  protected:
+    float GetSampleForFilterType() override;
+
+  public:
+    BandPassFilter();
+    BandPassFilter(Filter* filter);
+    BandPassFilter(float freq, float res, float q);
+    ~BandPassFilter();
+    bool IsSameFilterType(FilterType type) override { return type == BandPass; };
+};
+
+class HighPassFilter : public Filter {
+  protected:
+    float GetSampleForFilterType() override;
+
+  public:
+    HighPassFilter();
+    HighPassFilter(Filter* filter);
+    HighPassFilter(float freq, float res, float q);
+    ~HighPassFilter();
+    bool IsSameFilterType(FilterType type) override { return type == HighPass; };
+};
+
+class LowPassFilter : public Filter {
+  protected:
+    float GetSampleForFilterType() override;
+
+  public:
+    LowPassFilter();
+    LowPassFilter(Filter* filter);
+    LowPassFilter(float freq, float res, float q);
+    ~LowPassFilter();
+    bool IsSameFilterType(FilterType type) override { return type == LowPass; };
+};
\ No newline at end of file
diff --git a/inc/FilterFactory.h b/inc/FilterFactory.h
index 1fe471c..0c8a3f6 100644
--- a/inc/FilterFactory.h
+++ b/inc/FilterFactory.h
@@ -1,8 +1,5 @@
 #pragma once
 #include "Filter.h"
-#include "LowPassFilter.h"
-#include "BandPassFilter.h"
-#include "HighPassFilter.h"
 
 struct FilterFactory {
     static Filter* CreateFilter(Filter* old_filter, FilterType new_type) {
diff --git a/inc/HighPassFilter.h b/inc/HighPassFilter.h
deleted file mode 100644
index fa430ce..0000000
--- a/inc/HighPassFilter.h
+++ /dev/null
@@ -1,14 +0,0 @@
-#pragma once
-#include "Filter.h"
-
-class HighPassFilter : public Filter {
-  protected:
-    float GetSampleForFilterType() override;
-
-  public:
-    HighPassFilter();
-    HighPassFilter(Filter* filter);
-    HighPassFilter(float freq, float res, float q);
-    ~HighPassFilter();
-    bool IsSameFilterType(FilterType type) override { return type == HighPass; };
-};
diff --git a/inc/LowPassFilter.h b/inc/LowPassFilter.h
deleted file mode 100644
index f447670..0000000
--- a/inc/LowPassFilter.h
+++ /dev/null
@@ -1,16 +0,0 @@
-#pragma once
-
-#include "Filter.h"
-
-class LowPassFilter : public Filter {
-  protected:
-    float GetSampleForFilterType() override;
-
-  public:
-    LowPassFilter();
-    LowPassFilter(Filter* filter);
-    LowPassFilter(float freq, float res, float q);
-    ~LowPassFilter();
-    bool IsSameFilterType(FilterType type) override { return type == LowPass; };
-};
-
diff --git a/src/BandPassFilter.cpp b/src/BandPassFilter.cpp
index 2f1ee52..8bc9eeb 100644
--- a/src/BandPassFilter.cpp
+++ b/src/BandPassFilter.cpp
@@ -1,4 +1,4 @@
-#include "BandPassFilter.h"
+#include "Filter.h"
 #include "Settings.h"
 
 BandPassFilter::BandPassFilter() {
diff --git a/src/HighPassFilter.cpp b/src/HighPassFilter.cpp
index 90879d0..cb87ba7 100644
--- a/src/HighPassFilter.cpp
+++ b/src/HighPassFilter.cpp
@@ -1,4 +1,4 @@
-#include "HighPassFilter.h"
+#include "Filter.h"
 #include "Settings.h"
 
 HighPassFilter::HighPassFilter() {
diff --git a/src/LowPassFilter.cpp b/src/LowPassFilter.cpp
index 73cd8dc..eae67de 100644
--- a/src/LowPassFilter.cpp
+++ b/src/LowPassFilter.cpp
@@ -1,4 +1,4 @@
-#include "LowPassFilter.h"
+#include "Filter.h"
 #include "Settings.h"
 
 LowPassFilter::LowPassFilter() {
diff --git a/src/Synth.cpp b/src/Synth.cpp
index 4165b8a..14a57de 100644
--- a/src/Synth.cpp
+++ b/src/Synth.cpp
@@ -4,7 +4,6 @@
 #include "Logger.h"
 #include "OscillatorType.h"
 #include "Settings.h"
-#include "LowPassFilter.h"
 
 Synth::Synth(/* args */) {
     m_lfo = new LFO();