+
+ pan_azimuth_control->Changed.connect_same_thread (*this, boost::bind (&Pannable::value_changed, this));
+ pan_elevation_control->Changed.connect_same_thread (*this, boost::bind (&Pannable::value_changed, this));
+ pan_width_control->Changed.connect_same_thread (*this, boost::bind (&Pannable::value_changed, this));
+ pan_frontback_control->Changed.connect_same_thread (*this, boost::bind (&Pannable::value_changed, this));
+ pan_lfe_control->Changed.connect_same_thread (*this, boost::bind (&Pannable::value_changed, this));