! 
   ! Attention: You need read access to /dev/io to get in/out-port
   !            privileges. So xtuner is intended to run as root only!
   !

   Xtuner was developed to enable Linux and FreeBSD users to control
   Reveal's RA300 PC Radio Card and the AIMS Lab RadioTrack FM tuner
   card under the X Window System. It implements most all the features
   found with the software included from the manufacturer including
   presets, volume control, fine tuning, and timed auto on/off as well
   as tone control for bass and treble.

WWW: http://www.ndscs.nodak.edu/~tinnes/xtuner.html