diff --git a/src/effect_base.cpp b/src/effect_base.cpp
index 0cb69d3..d034f88 100644
--- a/src/effect_base.cpp
+++ b/src/effect_base.cpp
@@ -41,7 +41,7 @@ void AudioEffect::setParameters(std::vector<unsigned> params)
 
 std::vector<unsigned> AudioEffect::getParameters()
 {
-    size_t len = getParametersSize();
+    size_t len = this->getParametersSize();
     std::vector<unsigned> params;
     for (size_t i = 0; i < len; i++)
     {
diff --git a/src/effect_bigmuff.h b/src/effect_bigmuff.h
index 747c8e1..6ebae9d 100644
--- a/src/effect_bigmuff.h
+++ b/src/effect_bigmuff.h
@@ -35,7 +35,7 @@ public:
 protected:
     virtual size_t getParametersSize()
     {
-        return sizeof(AudioEffectBigMuff::Param);
+        return AudioEffectBigMuff::Param::UNKNOWN;
     }
     virtual void doProcess(const float32_t* inblockL, const float32_t* inblockR, float32_t* outblockL, float32_t* outblockR, uint16_t len);
 private:
diff --git a/src/effect_chorus.h b/src/effect_chorus.h
index e29b9d8..c03a6ab 100644
--- a/src/effect_chorus.h
+++ b/src/effect_chorus.h
@@ -45,7 +45,7 @@ public:
 protected:
     virtual size_t getParametersSize()
     {
-        return sizeof(AudioEffectChorus::Param);
+        return AudioEffectChorus::Param::UNKNOWN;
     }
     virtual void doProcess(const float32_t* inblockL, const float32_t* inblockR, float32_t* outblockL, float32_t* outblockR, uint16_t len);
 
diff --git a/src/effect_delay.h b/src/effect_delay.h
index 63d3e5c..15b81b5 100644
--- a/src/effect_delay.h
+++ b/src/effect_delay.h
@@ -39,7 +39,7 @@ public:
 protected:
     virtual size_t getParametersSize()
     {
-        return sizeof(AudioEffectDelay::Param);
+        return AudioEffectDelay::Param::UNKNOWN;
     }
     virtual void doProcess(const float32_t* inblockL, const float32_t* inblockR, float32_t* outblockL, float32_t* outblockR, uint16_t len);
 private:
diff --git a/src/effect_ds1.h b/src/effect_ds1.h
index 3b38e86..173c767 100644
--- a/src/effect_ds1.h
+++ b/src/effect_ds1.h
@@ -35,7 +35,7 @@ public:
 protected:
     virtual size_t getParametersSize()
     {
-        return sizeof(AudioEffectDS1::Param);
+        return AudioEffectDS1::Param::UNKNOWN;
     }
     virtual void doProcess(const float32_t* inblockL, const float32_t* inblockR, float32_t* outblockL, float32_t* outblockR, uint16_t len);
 private:
diff --git a/src/effect_lpf.h b/src/effect_lpf.h
index ee6f1ec..984afd3 100644
--- a/src/effect_lpf.h
+++ b/src/effect_lpf.h
@@ -100,7 +100,7 @@ public:
 protected:
     virtual size_t getParametersSize()
     {
-        return sizeof(AudioEffectLPF::Param);
+        return AudioEffectLPF::Param::UNKNOWN;
     }
 
     virtual void doProcess(const float32_t* inblockL, const float32_t* inblockR, float32_t* outblockL, float32_t* outblockR, uint16_t len)
diff --git a/src/effect_platervbstereo.h b/src/effect_platervbstereo.h
index 489f9ad..feaf599 100644
--- a/src/effect_platervbstereo.h
+++ b/src/effect_platervbstereo.h
@@ -136,7 +136,7 @@ public:
 protected:
     virtual size_t getParametersSize()
     {
-        return sizeof(AudioEffectPlateReverb::Param);
+        return AudioEffectPlateReverb::Param::UNKNOWN;
     }
     virtual void doProcess(const float32_t* inblockL, const float32_t* inblockR, float32_t* outblockL, float32_t* outblockR, uint16_t len);
 
diff --git a/src/effect_talreverb3.h b/src/effect_talreverb3.h
index 1c81f2b..cd8eb11 100644
--- a/src/effect_talreverb3.h
+++ b/src/effect_talreverb3.h
@@ -44,7 +44,7 @@ public:
 protected:
     virtual size_t getParametersSize()
     {
-        return sizeof(AudioEffectTalReverb3::Param);
+        return AudioEffectTalReverb3::Param::UNKNOWN;
     }
     virtual void doProcess(const float32_t* inblockL, const float32_t* inblockR, float32_t* outblockL, float32_t* outblockR, uint16_t len);
 private: