At a federal prison in the mountains of southern West Virginia, hundreds of female inmates are taking part in a pilot program to bring the quality of entertainment behind bars into the 21st century.

This image provided by Advanced Technologies Group Inc. shows an MP3 music player that they produce in Des. Moines Iowa, Friday, Mar. 2, 2012. 405 inmates at the Federal Prison camp in Alderson, W.Va.

More than 400 inmates have spent about $70 apiece to buy an MP3 player from the commissary in the Federal Prison Camp at Alderson, then 80 cents to $1.55 per song to customize their playlists from a ...