diff --git a/src/AudioIO.cpp b/src/AudioIO.cpp
index 26e13eec1..0d798a7cf 100644
--- a/src/AudioIO.cpp
+++ b/src/AudioIO.cpp
@@ -515,7 +515,7 @@ struct AudioIO::ScrubQueue
          // There is work in the queue, but if Producer is outrunning us, discard some,
          // which may make a skip yet keep playback better synchronized with user gestures.
          const auto interval = (now - mLastTransformerTimeMillis).ToDouble() / 1000.0;
-         const Entry &previous = mEntries[(mMiddleIdx + Size - 1) % Size];
+         //const Entry &previous = mEntries[(mMiddleIdx + Size - 1) % Size];
          const auto deficit =
             static_cast<long>(interval * mRate) - // Samples needed in the last time interval
             mCredit;                              // Samples done in the last time interval
diff --git a/src/Dependencies.cpp b/src/Dependencies.cpp
index a11850009..53d79a533 100644
--- a/src/Dependencies.cpp
+++ b/src/Dependencies.cpp
@@ -84,7 +84,7 @@ static void GetAllSeqBlocks(AudacityProject *project,
 static void ReplaceBlockFiles(AudacityProject *project,
                               ReplacedBlockFileHash &hash)
 {
-   const auto &dirManager = project->GetDirManager();
+   //const auto &dirManager = project->GetDirManager();
    BlockPtrArray blocks;
    GetAllSeqBlocks(project, &blocks);
 
diff --git a/src/Snap.cpp b/src/Snap.cpp
index ecfd2625f..94bf68b93 100644
--- a/src/Snap.cpp
+++ b/src/Snap.cpp
@@ -289,7 +289,10 @@ bool SnapManager::SnapToPoints(Track *currentTrack,
       return true;
    }
 
-   size_t indexInThisTrack = -1;
+   // indexInThisTrack is ONLY used if count > 0
+   // and is initialised then, so we can 'initialise' it
+   // to anything to keep compiler quiet.
+   size_t indexInThisTrack = left;
    size_t countInThisTrack = 0;
    for (i = left; i <= right; ++i)
    {
diff --git a/src/effects/Paulstretch.cpp b/src/effects/Paulstretch.cpp
index df6abae81..006a0715e 100644
--- a/src/effects/Paulstretch.cpp
+++ b/src/effects/Paulstretch.cpp
@@ -399,7 +399,7 @@ bool EffectPaulstretch::ProcessOne(WaveTrack *track,double t0,double t1,int coun
 /*************************************************************/
 
 
-PaulStretch::PaulStretch(float rap_, size_t in_bufsize_, float samplerate_)
+PaulStretch::PaulStretch(float rap_, size_t in_bufsize_, float /*samplerate_*/)
    : samplerate { samplerate }
    , rap { std::max(1.0f, rap_) }
    , in_bufsize { in_bufsize_ }
diff --git a/src/toolbars/ToolBar.cpp b/src/toolbars/ToolBar.cpp
index 1787260a5..b1a80af79 100644
--- a/src/toolbars/ToolBar.cpp
+++ b/src/toolbars/ToolBar.cpp
@@ -186,7 +186,7 @@ void ToolBarResizer::OnLeftUp( wxMouseEvent & event )
    }
 }
 
-void ToolBarResizer::OnEnter( wxMouseEvent & event )
+void ToolBarResizer::OnEnter( wxMouseEvent & /*event*/ )
 {
    // Bug 1201:  On Mac, unsetting and re-setting the tooltip may be needed
    // to make it pop up when we want it.
@@ -197,7 +197,7 @@ void ToolBarResizer::OnEnter( wxMouseEvent & event )
       mOrigFocus = FindFocus();
 }
 
-void ToolBarResizer::OnLeave( wxMouseEvent & event )
+void ToolBarResizer::OnLeave( wxMouseEvent & /*event*/ )
 {
    if (!GetCapture())
       mOrigFocus = nullptr;
diff --git a/src/widgets/Meter.cpp b/src/widgets/Meter.cpp
index 2e80ea842..e9f5d6648 100644
--- a/src/widgets/Meter.cpp
+++ b/src/widgets/Meter.cpp
@@ -868,10 +868,12 @@ static float floatMax(float a, float b)
    return a>b? a: b;
 }
 
+/* Unused as yet.
 static int intmin(int a, int b)
 {
    return a<b? a: b;
 }
+*/
 
 static int intmax(int a, int b)
 {