That's right, you can't escape from the nasty man with the loud music. According to John Carmack, speaking at QuakeCon 2000, the man is interested in doing some ambient backing music for the Doom 3 action, presumably somewhat like the midi-style backing present in the original Dooms! Here's a snippet from AMD Zone's article on the very subject..
You may also enjoy...
Two years after its third instalment.
Buy things with globes on them
And other lovely Eurogamer merch in our official store!