

Jimmy says: "It allows you to generate a playlist of music, out of 773 tracks from various games and megawads (including all of my own and Forty-Two's original material), and will then play it throughout the entirety of any megawad desired. Plays well with classic, modern, or Oblige-generated megawads."
More information - including a list of features - can be found at the official development thread over at ZDoom.org.