diff --git a/src/gb/gbSound.cpp b/src/gb/gbSound.cpp
index dc0cd5aa..1691d1e5 100644
--- a/src/gb/gbSound.cpp
+++ b/src/gb/gbSound.cpp
@@ -186,8 +186,8 @@ static void remake_stereo_buffer()
 
 void gbSoundReset()
 {
-	gb_effects_config.echo     = 0.20;
-	gb_effects_config.stereo   = 0.15;
+	gb_effects_config.echo     = 0.20f;
+	gb_effects_config.stereo   = 0.15f;
 	gb_effects_config.surround = false;
 	
 	SOUND_CLOCK_TICKS = 20000;
diff --git a/src/gb/gb_apu/Effects_Buffer.cpp b/src/gb/gb_apu/Effects_Buffer.cpp
index 65b68845..f3a7dcc0 100644
--- a/src/gb/gb_apu/Effects_Buffer.cpp
+++ b/src/gb/gb_apu/Effects_Buffer.cpp
@@ -19,7 +19,7 @@ Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */
 
 int const fixed_shift = 12;
 #define TO_FIXED( f )   fixed_t ((f) * ((fixed_t) 1 << fixed_shift))
-#define FROM_FIXED( f ) (f >> fixed_shift)
+#define FROM_FIXED( f ) ((f) >> fixed_shift)
 
 int const max_read = 2560; // determines minimum delay
 
@@ -505,7 +505,7 @@ void Effects_Buffer::mix_effects( blip_sample_t* out_, int pair_count )
 			int bufs_remain = bufs_size;
 			do
 			{
-				if ( buf->non_silent() && buf->echo == echo_phase )
+				if ( buf->non_silent() && ( buf->echo == (bool)echo_phase ) )
 				{
 					stereo_fixed_t* BLIP_RESTRICT out = (stereo_fixed_t*) &echo [echo_pos];
 					int const bass = BLIP_READER_BASS( *buf );
diff --git a/src/win32/SelectPlugin.cpp b/src/win32/SelectPlugin.cpp
index d2ed5e45..44cce033 100644
--- a/src/win32/SelectPlugin.cpp
+++ b/src/win32/SelectPlugin.cpp
@@ -54,7 +54,7 @@ void SelectPlugin::OnOK()
 	if (m_comboPlugin.GetCount() > 0)
 	{
 		int nSel = m_comboPlugin.GetCurSel();
-		if (nSel >= 0 && nSel < rpiPool.size())
+		if (nSel >= 0 && nSel < (int)rpiPool.size())
 			strcpy(theApp.pluginName, rpiPool[nSel].sFile);
 	}
 
@@ -77,10 +77,10 @@ BOOL SelectPlugin::OnInitDialog()
 	size_t nPluginCnt = EnumPlugins();
 	if (nPluginCnt > 0)
 	{
-		for (int i = 0; i < rpiPool.size(); i++)
+		for (size_t i = 0; i < rpiPool.size(); i++)
 			m_comboPlugin.AddString(rpiPool[i].sDesc);
 
-		for (int ii = 0; ii < rpiPool.size(); ii++)
+		for (size_t ii = 0; ii < rpiPool.size(); ii++)
 		{
 			if (_stricmp(theApp.pluginName, rpiPool[ii].sFile) == 0)
 			{