diff --git a/src/engine/config.h b/src/engine/config.h
index 9d736550..c5fd5277 100644
--- a/src/engine/config.h
+++ b/src/engine/config.h
@@ -17,7 +17,7 @@
 #define AUDIO_CHANNELS 1
 
 // Samplerate must be 8 / 16 / 24 / 32 / 48 KHz
-#define AUDIO_SAMPLERATE 8000
+#define AUDIO_SAMPLERATE 48000
 #define AUDIO_MIC_BUFFER_COUNT 16
 #define AUDIO_MIC_BUFFER_LENGTH 10
 #define AUDIO_MIC_BUFFER_SIZE  (AUDIO_MIC_BUFFER_LENGTH * AUDIO_SAMPLERATE / 1000 * 2 * AUDIO_CHANNELS)
diff --git a/src/engine/media/MT_AudioCodec.cpp b/src/engine/media/MT_AudioCodec.cpp
index 7b45f7af..bb1ba00a 100644
--- a/src/engine/media/MT_AudioCodec.cpp
+++ b/src/engine/media/MT_AudioCodec.cpp
@@ -535,7 +535,7 @@ int OpusCodec::plc(int lostFrames, void* output, int outputCapacity)
 #define ILBC_CODEC_NAME "ILBC"
 
 IlbcCodec::IlbcCodec(int packetTime)
-:mPacketTime(packetTime)
+:mPacketTime(packetTime), mEncoderCtx(nullptr), mDecoderCtx(nullptr)
 {
   WebRtcIlbcfix_EncoderCreate(&mEncoderCtx);
   WebRtcIlbcfix_DecoderCreate(&mDecoderCtx);