Andrew, current edition of the german computer magazine "c't" has an article on virtual spatialization. They mention "Dolby headphone (tm)" and another effort by Creative (makers of the soundblaster stuff). What they say about results perfectly dampens any higher expectations. Reading the thing makes me doubt that simply convolving with a room response would do what you want. "Kunstkopf", a very old technique, might be worth googling for. And in the back of my mind there's a faint note about David R. Clark (davidrclark@xxxxxxxxxxxxx) knowing things about headphone spatialization. He used to be on LAU. Wolfgang