diff --git a/libraries/adlmidi/adlmidi_midiplay.cpp b/libraries/adlmidi/adlmidi_midiplay.cpp
index 657f82564..f77ce81f6 100644
--- a/libraries/adlmidi/adlmidi_midiplay.cpp
+++ b/libraries/adlmidi/adlmidi_midiplay.cpp
@@ -1714,7 +1714,7 @@ size_t MIDIplay::chooseDevice(const std::string &name)
     size_t n = m_midiDevices.size() * 16;
     m_midiDevices.insert(std::make_pair(name, n));
     m_midiChannels.resize(n + 16);
-    resetMIDIDefaults(n);
+    resetMIDIDefaults(static_cast<int>(n));
     return n;
 }
 
diff --git a/libraries/adlmidi/adlmidi_opl3.cpp b/libraries/adlmidi/adlmidi_opl3.cpp
index 9fbb8bb37..a3ec71b63 100644
--- a/libraries/adlmidi/adlmidi_opl3.cpp
+++ b/libraries/adlmidi/adlmidi_opl3.cpp
@@ -394,7 +394,7 @@ static inline double s_dmxFreq(double tone)
 {
     uint_fast32_t noteI = (uint_fast32_t)(tone);
     int_fast32_t bendI = 0;
-    int_fast32_t outHz = 0.0;
+    int_fast32_t outHz = 0;
     double bendDec = tone - (int)tone;
 
     bendI = (int_fast32_t)((bendDec * 128.0) / 2.0) + 128;
@@ -470,7 +470,7 @@ static inline double s_apogeeFreq(double tone)
 {
     uint_fast32_t noteI = (uint_fast32_t)(tone);
     int_fast32_t bendI = 0;
-    int_fast32_t outHz = 0.0;
+    int_fast32_t outHz = 0;
     double bendDec = tone - (int)tone;
     int_fast32_t octave;
     int_fast32_t scaleNote;
diff --git a/libraries/opnmidi/opnmidi_midiplay.cpp b/libraries/opnmidi/opnmidi_midiplay.cpp
index f3e4f4985..f2a76ab7d 100644
--- a/libraries/opnmidi/opnmidi_midiplay.cpp
+++ b/libraries/opnmidi/opnmidi_midiplay.cpp
@@ -1606,7 +1606,7 @@ size_t OPNMIDIplay::chooseDevice(const std::string &name)
     size_t n = m_midiDevices.size() * 16;
     m_midiDevices.insert(std::make_pair(name, n));
     m_midiChannels.resize(n + 16);
-    resetMIDIDefaults(n);
+    resetMIDIDefaults(static_cast<int>(n));
     return n;
 }
 
diff --git a/libraries/opnmidi/opnmidi_opn2.cpp b/libraries/opnmidi/opnmidi_opn2.cpp
index 26ef352f2..a58945c9e 100644
--- a/libraries/opnmidi/opnmidi_opn2.cpp
+++ b/libraries/opnmidi/opnmidi_opn2.cpp
@@ -400,7 +400,7 @@ void OPN2::touchNote(size_t c,
         if(volume > minVolume)
         {
             double lv = std::log(static_cast<double>(volume));
-            volume = static_cast<uint_fast32_t>(lv * c1 - c2) * 2.0;
+            volume = static_cast<uint_fast32_t>(lv * c1 - c2) * 2;
         }
         else
             volume = 0;