Applied accessibility patch from David that I missed.

From David's message:

   "solution to the problem of getting jaws to read the updated
   name after choosing start/stop monitoring on the menu"

src/widgets/Meter.cpp

@@ -233,7 +233,8 @@ Meter::Meter(AudacityProject *project,
    mNumBars(0),
    mLayoutValid(false),
    mBitmap(NULL),
-   mIcon(NULL)
+   mIcon(NULL),
+   mAccSilent(false)
 {
    mStyle = mDesiredStyle;
 
@@ -1913,8 +1914,22 @@ void Meter::ShowMenu(const wxPoint & pos)
 
    menu->Append(OnPreferencesID, _("Preferences..."));
 
+   mAccSilent = true;      // temporarily make screen readers say (close to) nothing on focus events
+
    PopupMenu(menu, pos);
 
+   /* if stop/start monitoring was chosen in the menu, then by this point
+   OnMonitoring has been called and variables which affect the accessibility
+   name have been updated so it's now ok for screen readers to read the name of
+   the button */
+   mAccSilent = false;
+#if wxUSE_ACCESSIBILITY
+   GetAccessible()->NotifyEvent(wxACC_EVENT_OBJECT_FOCUS,
+                                this,
+                                wxOBJID_CLIENT,
+                                wxACC_SELF);
+#endif
+
    delete menu;
 }
 
@@ -2195,6 +2210,13 @@ wxAccStatus MeterAx::GetName(int WXUNUSED(childId), wxString* name)
 {
    Meter *m = wxDynamicCast(GetWindow(), Meter);
 
+   if (m->mAccSilent)
+   {
+      *name = wxT("");     // Jaws reads nothing, and nvda reads "unknown"
+   }
+   else
+   {
+
       *name = m->GetName();
       if (name->IsEmpty())
       {
@@ -2234,6 +2256,7 @@ wxAccStatus MeterAx::GetName(int WXUNUSED(childId), wxString* name)
       {
          *name += wxString::Format(_(" Clipped "));
       }
+   }
 
    return wxACC_OK;
 }
@@ -2241,6 +2264,11 @@ wxAccStatus MeterAx::GetName(int WXUNUSED(childId), wxString* name)
 // Returns a role constant.
 wxAccStatus MeterAx::GetRole(int WXUNUSED(childId), wxAccRole* role)
 {
+   Meter *m = wxDynamicCast(GetWindow(), Meter);
+
+   if (m->mAccSilent)
+      *role = wxROLE_NONE;    // Jaws and nvda both read nothing
+   else
       *role = wxROLE_SYSTEM_BUTTONDROPDOWN;
 
    return wxACC_OK;

src/widgets/Meter.h

@@ -274,6 +274,8 @@ class Meter : public wxPanel
    bool mHadKeyDown;
 #endif
 
+   bool mAccSilent;
+
    friend class MeterAx;
 
    DECLARE_EVENT_TABLE()