No, this is not "what do you listen to while you map". This is "What music should be played WHILE playing a certain map".
Music in games is all about setting the atmosphere in a level, you cant have an up beat tune in a dark and evil map, it just wouldn't be right, wheras something gritty, un-settling and generally evil would intensify the mood of the map you have made.
So, how much can music affect custom maps? How should it be used? Is it a shame that in some games custom music cannot be used. Thoughts and ideas please...