Set the media role for pulse audio

src/engines/gstengine.h

@@ -148,7 +148,6 @@ class GstEngine : public Engine::Base, public BufferConsumer {
 
   typedef QList<PluginDetails> PluginDetailsList;
 
-  static void SetEnv(const char* key, const QString& value);
   PluginDetailsList GetPluginList(const QString& classname) const;
 
   void StartFadeout();

src/main.cpp

@@ -202,6 +202,8 @@ void SetGstreamerEnvironment() {
   SetEnv("GIO_EXTRA_MODULES",
          QCoreApplication::applicationDirPath() + "/../PlugIns/gio-modules");
 #endif
+
+  SetEnv("PULSE_PROP_media.role", "music");
 }
 
 void ParseAProto() {