diff --git a/libs/evoral/evoral/Curve.hpp b/libs/evoral/evoral/Curve.hpp
index 6aeeb039d7..bf2de520a0 100644
--- a/libs/evoral/evoral/Curve.hpp
+++ b/libs/evoral/evoral/Curve.hpp
@@ -41,7 +41,6 @@ public:
 	void mark_dirty() const { _dirty = true; }
 
 private:
-	double unlocked_eval (double where);
 	double multipoint_eval (double x);
 
 	void _get_vector (double x0, double x1, float *arg, int32_t veclen);
@@ -52,9 +51,5 @@ private:
 
 } // namespace Evoral
 
-extern "C" {
-	LIBEVORAL_API void curve_get_vector_from_c (void *arg, double, double, float*, int32_t);
-}
-
 #endif // EVORAL_CURVE_HPP
 
diff --git a/libs/evoral/evoral/Note.hpp b/libs/evoral/evoral/Note.hpp
index 43db728b0c..88d4077af9 100644
--- a/libs/evoral/evoral/Note.hpp
+++ b/libs/evoral/evoral/Note.hpp
@@ -43,8 +43,6 @@ public:
 	Note(const Note<Time>& copy);
 	~Note();
 
-	const Note<Time>& operator=(const Note<Time>& copy);
-
 	inline bool operator==(const Note<Time>& other) {
 		return time() == other.time() &&
 			note() == other.note() &&
@@ -69,6 +67,8 @@ public:
 	}
 
 private:
+	const Note<Time>& operator=(const Note<Time>& copy);  // undefined (unsafe)
+
 	inline int clamp(int val, int low, int high) {
 		return std::min (std::max (val, low), high);
 	}
diff --git a/libs/evoral/evoral/Range.hpp b/libs/evoral/evoral/Range.hpp
index e2ac87e909..20020115ac 100644
--- a/libs/evoral/evoral/Range.hpp
+++ b/libs/evoral/evoral/Range.hpp
@@ -78,13 +78,11 @@ template<typename T>
 
 	if (sa > ea) {
 		// seems we are sometimes called with negative length ranges
-		std::cerr << "a - start after end: " << sa << ", " << ea << std::endl;
 		return OverlapNone;
 	}
 
 	if (sb > eb) {
 		// seems we are sometimes called with negative length ranges
-		std::cerr << "b - start after end: " << sb << ", " << eb << std::endl;
 		return OverlapNone;
 	}
 
diff --git a/libs/evoral/src/Control.cpp b/libs/evoral/src/Control.cpp
index a6cd374c54..56f5f70f2c 100644
--- a/libs/evoral/src/Control.cpp
+++ b/libs/evoral/src/Control.cpp
@@ -18,8 +18,6 @@
 
 #include <iostream>
 
-#include "pbd/stacktrace.h"
-
 #include "evoral/Control.hpp"
 #include "evoral/ControlList.hpp"
 #include "evoral/ParameterDescriptor.hpp"
diff --git a/libs/evoral/src/Curve.cpp b/libs/evoral/src/Curve.cpp
index 8a4aa470c1..a8605c6f1d 100644
--- a/libs/evoral/src/Curve.cpp
+++ b/libs/evoral/src/Curve.cpp
@@ -328,18 +328,6 @@ Curve::_get_vector (double x0, double x1, float *vec, int32_t veclen)
 	}
 }
 
-double
-Curve::unlocked_eval (double x)
-{
-	// I don't see the point of this...
-
-	if (_dirty) {
-		solve ();
-	}
-
-	return _list.unlocked_eval (x);
-}
-
 double
 Curve::multipoint_eval (double x)
 {
@@ -416,13 +404,3 @@ Curve::multipoint_eval (double x)
 }
 
 } // namespace Evoral
-
-extern "C" {
-
-void
-curve_get_vector_from_c (void *arg, double x0, double x1, float* vec, int32_t vecsize)
-{
-	static_cast<Evoral::Curve*>(arg)->get_vector (x0, x1, vec, vecsize);
-}
-
-}
diff --git a/libs/evoral/src/Note.cpp b/libs/evoral/src/Note.cpp
index 52a4d6335b..f2d369d825 100644
--- a/libs/evoral/src/Note.cpp
+++ b/libs/evoral/src/Note.cpp
@@ -92,24 +92,6 @@ Note<Time>::set_id (event_id_t id)
 	_off_event.set_id (id);
 }
 
-template<typename Time>
-const Note<Time>&
-Note<Time>::operator=(const Note<Time>& other)
-{
-	_on_event = other._on_event;
-	_off_event = other._off_event;
-
-	assert(time() == other.time());
-	assert(end_time() == other.end_time());
-	assert(length() == other.length());
-	assert(note() == other.note());
-	assert(velocity() == other.velocity());
-	assert(_on_event.channel() == _off_event.channel());
-	assert(channel() == other.channel());
-
-	return *this;
-}
-
 template class Note<Evoral::Beats>;
 
 } // namespace Evoral