List Selector:

       A player recognizes  and plays the  module. Some  feeds  the
               hardware directly, some passes the data to a noteplayer.

               When a player is selected (and if it uses a noteplayer), you
               can  press  the  "?"  button in the top right of the window.
               This  will  open  a  window  with  a list containing all the
               NotePlayers  which can be used by the player. Hereby you can
               select  the  NotePlayer  you  prefer should be used with the
               player.  If, for some reason, the NotePlayer isn't available
               when  the  player  tries to use it, it will scan through the
               NotePlayers until it finds a usable one.

   The noteplayer  recieves the sound data from  the player and
               makes your computer play the sound. Some of the  noteplayers
               has  the ability to mix several channels into the four audio
               channels of the amiga.

        Agents are programs which can be  initiated  when  the  user
               performs a certain action.

  You can cycle trough the items with the keys < and >.

  Some (Note)Players are built  into the  main program  while  the rest  of
  them are stored as files in "LIBS:APlayer" or "LIBS:APlayer/NotePlayers".
  When APlayer has loaded a file, it has to  check which type of module  it
  is. With  this  window  you can decide which (Note)Players that should be
  used, and in which order they should be used (prioritized list).

  When  a (Note)Player  is chosen, the  version number  is displayed  in  a
  little box in the top left of the right part of the window.