Define a simple player with the use of `emms-define-player'. name is used to construct the name of the function like emms-player-name. types is a list of track types understood by this player. regex must be a regexp that matches the filenames the player can play. command specifies the command line argument to call the player and args are the command line arguments.
For a discussion on how to define new players see See New Player.
Starts a process playing filename using the specified cmdname with the specified params.