What these commands do? At first, I have had to set the right output.
The "pin 5" is the one that works on my Lenovo x60. The volume was
obviously set to 40%. And the last command played the file.
A more elaborate GUI player called "zuke" exists. It can use playlists
and it is controlled by keys and mouse clicks. Is can be used as:
"audio/mkplist music_directory |audio/zuke"