diff --git a/lib-src/portmixer/src/px_win_endpoint.c b/lib-src/portmixer/src/px_win_endpoint.c
index f4eb56cd8..34c7f3038 100644
--- a/lib-src/portmixer/src/px_win_endpoint.c
+++ b/lib-src/portmixer/src/px_win_endpoint.c
@@ -246,9 +246,6 @@ int open_ep_mixers_byid(px_mixer *Px, wchar_t *deviceIn, wchar_t *deviceOut)
    IMMDeviceEnumerator *denum = NULL;
    IMMDevice *device = NULL;
    HRESULT hr;
-   MMRESULT res;
-   LPWSTR idStr;
-   size_t idLen;
 
    if (!initialize(Px)) {
       goto fail;
diff --git a/src/AudacityLogger.cpp b/src/AudacityLogger.cpp
index 1a780f49f..56b71539f 100644
--- a/src/AudacityLogger.cpp
+++ b/src/AudacityLogger.cpp
@@ -68,6 +68,7 @@ void AudacityLogger::Flush()
    }
 }
 
+// ANSWER-ME: This is unused. Can it be deleted? If not, note that t param is unused.
 void AudacityLogger::DoLogString(const wxChar *str, time_t t)
 {
    if (!wxIsMainThread()) {
@@ -257,7 +258,7 @@ void AudacityLogger::Show(bool show)
    Flush();
 }
 
-void AudacityLogger::OnCloseWindow(wxCloseEvent & e)
+void AudacityLogger::OnCloseWindow(wxCloseEvent & WXUNUSED(e))
 {
 #if defined(__WXMAC__)
    // On the Mac, destroy the window rather than hiding it since the
@@ -269,13 +270,13 @@ void AudacityLogger::OnCloseWindow(wxCloseEvent & e)
 #endif
 }
 
-void AudacityLogger::OnClose(wxCommandEvent & e)
+void AudacityLogger::OnClose(wxCommandEvent & WXUNUSED(e))
 {
    wxCloseEvent dummy;
    OnCloseWindow(dummy);
 }
 
-void AudacityLogger::OnClear(wxCommandEvent & e)
+void AudacityLogger::OnClear(wxCommandEvent & WXUNUSED(e))
 {
    mBuffer = wxEmptyString;
 
@@ -284,7 +285,7 @@ void AudacityLogger::OnClear(wxCommandEvent & e)
    Flush();
 }
 
-void AudacityLogger::OnSave(wxCommandEvent & e)
+void AudacityLogger::OnSave(wxCommandEvent & WXUNUSED(e))
 {
    wxString fName = _("log.txt");
 
diff --git a/src/Sequence.cpp b/src/Sequence.cpp
index dad2b67ac..d576f8c45 100644
--- a/src/Sequence.cpp
+++ b/src/Sequence.cpp
@@ -506,7 +506,7 @@ bool Sequence::Paste(sampleCount s, const Sequence *src)
       return ConsistencyCheck(wxT("Paste branch one"));
    }
 
-   if (b >= 0 && b < numBlocks
+   if ((b >= 0 ) && (b < (int)numBlocks)
        && ((mBlock->Item(b)->f->GetLength() + addedLen) < mMaxSamples)) {
       // Special case: we can fit all of the new samples inside of
       // one block!
diff --git a/src/effects/lv2/LV2Effect.h b/src/effects/lv2/LV2Effect.h
index 83d036729..3a24428c3 100644
--- a/src/effects/lv2/LV2Effect.h
+++ b/src/effects/lv2/LV2Effect.h
@@ -4,7 +4,7 @@
 
   LV2Effect.h
 
-  Audacity(R) is copyright (c) 1999-2008 Audacity Team.
+  Audacity(R) is copyright (c) 1999-2013 Audacity Team.
   License: GPL v2.  See License.txt.
 
 *********************************************************************/
diff --git a/src/widgets/Grid.cpp b/src/widgets/Grid.cpp
index bd035862f..04b195e5a 100644
--- a/src/widgets/Grid.cpp
+++ b/src/widgets/Grid.cpp
@@ -301,7 +301,7 @@ bool ChoiceEditor::EndEdit(int row, int col,
    int sel = Choice()->GetSelection();
 
    // This can happen if the wxChoice control is displayed and the list of choices get changed
-   if (sel < 0 || sel >= mChoices.GetCount())
+   if ((sel < 0) || (sel >= (int)(mChoices.GetCount())))
    {
       return false;
    }
diff --git a/src/widgets/valnum.cpp b/src/widgets/valnum.cpp
index d9515b5d9..1c2abf47e 100644
--- a/src/widgets/valnum.cpp
+++ b/src/widgets/valnum.cpp
@@ -123,7 +123,6 @@ void wxNumValidatorBase::OnChar(wxKeyEvent& event)
         return;
 
 #if wxUSE_UNICODE
-    wxKeyEvent & e = event;
     const int ch = event.GetUnicodeKey();
     const int c = event.GetKeyCode();
     if ( c > WXK_START )