diff --git a/Audjustable.xcodeproj/project.xcworkspace/xcuserdata/tum.xcuserdatad/UserInterfaceState.xcuserstate b/Audjustable.xcodeproj/project.xcworkspace/xcuserdata/tum.xcuserdatad/UserInterfaceState.xcuserstate
index 231e51e..acacb5e 100644
Binary files a/Audjustable.xcodeproj/project.xcworkspace/xcuserdata/tum.xcuserdatad/UserInterfaceState.xcuserstate and b/Audjustable.xcodeproj/project.xcworkspace/xcuserdata/tum.xcuserdatad/UserInterfaceState.xcuserstate differ
diff --git a/Audjustable/Classes/AudioPlayer/AudioPlayer.m b/Audjustable/Classes/AudioPlayer/AudioPlayer.m
index 5d2f87e..461a54a 100644
--- a/Audjustable/Classes/AudioPlayer/AudioPlayer.m
+++ b/Audjustable/Classes/AudioPlayer/AudioPlayer.m
@@ -1286,6 +1286,8 @@ static void AudioQueueIsRunningCallbackProc(void* userData, AudioQueueRef audioQ
     
     if (error)
     {
+        pthread_mutex_unlock(&queueBuffersMutex);
+        
         return;
     }