diff --git a/shared/DSPFilters/include/DspFilters/Elliptic.h b/shared/DSPFilters/include/DspFilters/Elliptic.h
index 341f0a63..0e6ecf4a 100644
--- a/shared/DSPFilters/include/DspFilters/Elliptic.h
+++ b/shared/DSPFilters/include/DspFilters/Elliptic.h
@@ -92,8 +92,6 @@ class AnalogLowPass : public LayoutBase
 #else
 #endif
 
-  double m_p0;
-  double m_q;
   double m_K;
   double m_Kprime;
   double m_e;
@@ -108,7 +106,6 @@ class AnalogLowPass : public LayoutBase
   double m_d1[100];
   double m_q1[100];
   double m_z1[100];
-  double m_f1[100];
   double m_s1[100];
   double m_p [100];
   double m_zw1[100];
diff --git a/shared/DSPFilters/include/DspFilters/RootFinder.h b/shared/DSPFilters/include/DspFilters/RootFinder.h
index 35af6e84..b3da0c1b 100644
--- a/shared/DSPFilters/include/DspFilters/RootFinder.h
+++ b/shared/DSPFilters/include/DspFilters/RootFinder.h
@@ -51,7 +51,7 @@ class RootFinderBase
 public:
   struct Array
   {
-    Array (int max, complex_t* values)
+    Array (int /*max*/, complex_t* /*values*/)
      // : m_max (max)
      // , m_values (values)
     {
diff --git a/shared/DSPFilters/include/DspFilters/State.h b/shared/DSPFilters/include/DspFilters/State.h
index 3bca2012..10110560 100644
--- a/shared/DSPFilters/include/DspFilters/State.h
+++ b/shared/DSPFilters/include/DspFilters/State.h
@@ -178,7 +178,7 @@ class TransposedDirectFormI
   template <typename Sample>
   inline Sample process1 (const Sample in,
                           const BiquadBase& s,
-                          const double vsa)
+                          const double /*vsa*/)
   {
     double out;
 
@@ -262,7 +262,7 @@ class ChannelsState
   {
   }
 
-  const int getNumChannels() const
+  int getNumChannels() const
   {
     return Channels;
   }
@@ -297,7 +297,7 @@ template <class StateType>
 class ChannelsState <0, StateType>
 {
 public:
-  const int getNumChannels() const
+  int getNumChannels() const
   {
     return 0;
   }
@@ -308,9 +308,9 @@ class ChannelsState <0, StateType>
   }
 
   template <class FilterDesign, typename Sample>
-  void process (int numSamples,
-                Sample* const* arrayOfChannels,
-                FilterDesign& filter)
+  void process (int /*numSamples*/,
+                Sample* const* /*arrayOfChannels*/,
+                FilterDesign& /*filter*/)
   {
     throw std::logic_error ("attempt to process empty ChannelState");
   }
diff --git a/shared/DSPFilters/source/Documentation.cpp b/shared/DSPFilters/source/Documentation.cpp
index 1380da6c..bd520316 100644
--- a/shared/DSPFilters/source/Documentation.cpp
+++ b/shared/DSPFilters/source/Documentation.cpp
@@ -297,7 +297,7 @@ Filter family namespaces
 #include <iomanip>
 
 namespace {
-
+#if 0
 void UsageExamples ()
 {
   // create a two channel audio buffer
@@ -452,5 +452,5 @@ void UsageExamples ()
     std::cout << os.str();
   }
 }
-
+#endif
 }
diff --git a/shared/DSPFilters/source/PoleFilter.cpp b/shared/DSPFilters/source/PoleFilter.cpp
index 6c2bc1c1..ad4ff049 100644
--- a/shared/DSPFilters/source/PoleFilter.cpp
+++ b/shared/DSPFilters/source/PoleFilter.cpp
@@ -181,7 +181,7 @@ BandPassTransform::BandPassTransform (double fc,
     //
 #ifndef NDEBUG
     ComplexPair p2 = transform (pair.poles.second);
-    ComplexPair z2 = transform (pair.zeros.second);
+    transform (pair.zeros.second);
     assert (p2.first == std::conj (p1.first));
     assert (p2.second == std::conj (p1.second));
 #endif