<node>
  <interface name="org.gnome.Shell.AudioDeviceSelection">
    <method name="Open">
      <arg name="devices" direction="in" type="as"/>
    </method>
    <method name="Close">
    </method>
    <signal name="DeviceSelected">
      <arg name="device" type="s"/>
    </signal>
  </interface>
</node>
