Looking for hrtfs? Try http://interface.cipic.ucdavis.edu/CIL_html/CIL_HRTF_database.htm
João
anyway, i'm working on implementing HRTF convolution in Pd. i'm
not a VERY experienced programmer but i have some skills, and i have a lot of people in the spatial audio field helping me out. i actually wrote my own convolution patch but it was brute-force, and in the end it took too many CPU cycles. it just plain old didn't work, so now i'm using FFTs to do it and hopefully the CPU can handle multiple sources. how many HRTFs do you have? i'd like to eventually modify the external so that it would be very easy for anybody to use with however many HRTFs with however many taps.