Ensure GStreamer is using pulseaudio

[Florian Lindner]

Hello!

On my Arch / KDE system I want to use pulseaudio. The Arch Wiki 
https://wiki.archlinux.org/index.php/Pulseaudio#GStreamer says it's sufficient 
to install gstreamer0.10-good-plugins which I have.

According to pavucontrol my KDE with GStreamer backend still uses ALSA 
directly. How can I test if gstreamer uses pulseaudio or if some plugin is 
missing?

Thanks!
Florian