diff --git a/src/audiomixerboard.cpp b/src/audiomixerboard.cpp
index c1ca9713..4bc949f6 100755
--- a/src/audiomixerboard.cpp
+++ b/src/audiomixerboard.cpp
@@ -713,13 +713,7 @@ void CAudioMixerBoard::SetServerName ( const QString& strNewServerName )
         // list was received, the connection was successful and the title is updated
         // with the correct server name. Make sure to choose a "try to connect" title
         // which is most striking (we use filled blocks and upper case letters).
-        QByteArray baBlock;
-        baBlock.append ( 0xE2 );
-        baBlock.append ( 0x96 );
-        baBlock.append ( 0x88 );
-        QString sBlocks = QString().fromUtf8 ( baBlock ).repeated ( 5 );
-
-        pGroupBox->setTitle ( sBlocks + "  T R Y I N G   T O   C O N N E C T  " + sBlocks );
+        pGroupBox->setTitle ( u8"\u2588\u2588\u2588\u2588\u2588  T R Y I N G   T O   C O N N E C T  \u2588\u2588\u2588\u2588\u2588" );
     }
 }
 
diff --git a/src/client.cpp b/src/client.cpp
index 515bc012..fd98749a 100755
--- a/src/client.cpp
+++ b/src/client.cpp
@@ -945,7 +945,7 @@ vecsMultChanAudioSndCrd = vecsStereoSndCrdTMP; // TEST just copy the stereo data
 
 void CClient::ProcessAudioDataIntern ( CVector<int16_t>& vecsStereoSndCrd )
 {
-    int            i, j;
+    int            i, j, iUnused;
     unsigned char* pCurCodedData;
 
 
@@ -1094,19 +1094,19 @@ void CClient::ProcessAudioDataIntern ( CVector<int16_t>& vecsStereoSndCrd )
         {
             if ( bMuteOutStream )
             {
-                opus_custom_encode ( CurOpusEncoder,
-                                     &vecZeros[i * iNumAudioChannels * iOPUSFrameSizeSamples],
-                                     iOPUSFrameSizeSamples,
-                                     &vecCeltData[0],
-                                     iCeltNumCodedBytes );
+                iUnused = opus_custom_encode ( CurOpusEncoder,
+                                               &vecZeros[i * iNumAudioChannels * iOPUSFrameSizeSamples],
+                                               iOPUSFrameSizeSamples,
+                                               &vecCeltData[0],
+                                               iCeltNumCodedBytes );
             }
             else
             {
-                opus_custom_encode ( CurOpusEncoder,
-                                     &vecsStereoSndCrd[i * iNumAudioChannels * iOPUSFrameSizeSamples],
-                                     iOPUSFrameSizeSamples,
-                                     &vecCeltData[0],
-                                     iCeltNumCodedBytes );
+                iUnused = opus_custom_encode ( CurOpusEncoder,
+                                               &vecsStereoSndCrd[i * iNumAudioChannels * iOPUSFrameSizeSamples],
+                                               iOPUSFrameSizeSamples,
+                                               &vecCeltData[0],
+                                               iCeltNumCodedBytes );
             }
         }
 
@@ -1150,11 +1150,11 @@ void CClient::ProcessAudioDataIntern ( CVector<int16_t>& vecsStereoSndCrd )
         // OPUS decoding
         if ( CurOpusDecoder != nullptr )
         {
-            opus_custom_decode ( CurOpusDecoder,
-                                 pCurCodedData,
-                                 iCeltNumCodedBytes,
-                                 &vecsStereoSndCrd[i * iNumAudioChannels * iOPUSFrameSizeSamples],
-                                 iOPUSFrameSizeSamples );
+            iUnused = opus_custom_decode ( CurOpusDecoder,
+                                           pCurCodedData,
+                                           iCeltNumCodedBytes,
+                                           &vecsStereoSndCrd[i * iNumAudioChannels * iOPUSFrameSizeSamples],
+                                           iOPUSFrameSizeSamples );
         }
     }
 
diff --git a/src/server.cpp b/src/server.cpp
index d3658c0c..36a3e3e0 100755
--- a/src/server.cpp
+++ b/src/server.cpp
@@ -942,7 +942,7 @@ void CServer::Stop()
 
 void CServer::OnTimer()
 {
-    int                i, j;
+    int                i, j, iUnused;
     int                iClientFrameSizeSamples;
     OpusCustomDecoder* CurOpusDecoder;
     OpusCustomEncoder* CurOpusEncoder;
@@ -1095,11 +1095,11 @@ JitterMeas.Measure();
                     // OPUS decode received data stream
                     if ( CurOpusDecoder != nullptr )
                     {
-                        opus_custom_decode ( CurOpusDecoder,
-                                             pCurCodedData,
-                                             iCeltNumCodedBytes,
-                                             &vecvecsData[i][iB * SYSTEM_FRAME_SIZE_SAMPLES * vecNumAudioChannels[i]],
-                                             iClientFrameSizeSamples );
+                        iUnused = opus_custom_decode ( CurOpusDecoder,
+                                                       pCurCodedData,
+                                                       iCeltNumCodedBytes,
+                                                       &vecvecsData[i][iB * SYSTEM_FRAME_SIZE_SAMPLES * vecNumAudioChannels[i]],
+                                                       iClientFrameSizeSamples );
                     }
                 }
 
@@ -1242,11 +1242,11 @@ JitterMeas.Measure();
 opus_custom_encoder_ctl ( CurOpusEncoder,
                           OPUS_SET_BITRATE ( CalcBitRateBitsPerSecFromCodedBytes ( iCeltNumCodedBytes, iClientFrameSizeSamples ) ) );
 
-                        opus_custom_encode ( CurOpusEncoder,
-                                             &vecsSendData[iB * SYSTEM_FRAME_SIZE_SAMPLES * vecNumAudioChannels[i]],
-                                             iClientFrameSizeSamples,
-                                             &vecbyCodedData[0],
-                                             iCeltNumCodedBytes );
+                        iUnused = opus_custom_encode ( CurOpusEncoder,
+                                                       &vecsSendData[iB * SYSTEM_FRAME_SIZE_SAMPLES * vecNumAudioChannels[i]],
+                                                       iClientFrameSizeSamples,
+                                                       &vecbyCodedData[0],
+                                                       iCeltNumCodedBytes );
                     }
 
                     // send separate mix to current clients