oh dear, to get anything realistic at all would be extremely involved. There is a system here (University of Southampton) that people have developed over years that uses two loudspeakers placed VERY close to each other and works well for a few people sitting in the sweet spot. Thing is it uses a supercomputer to do realtime convolution of many individual sounds with very long FIR filters...
The method is basically three stage: -use a kemar (dummy head) and the exact loudspeaker setup to measure the transfer functions from loudspeaker to the listeners ears -use a kemar to measure the head-related transfer functions (HRTF's) for a whole bunch of directions of arrival -use these frequency responses to (a) invert the louspeaker->ear response and (b) mimic the HRTF response, so that sounds when they finally arrive at your ear are as though they coming from the desired direction.
The reason the speakers are placed so close together is that it allows you to more easily control the sound an INDIVIDUAL ear hears, ie. it cancels the crosstalk for a larger region of space around the ear. Just some info to demonstrate the HUGENESS of the problem! good luck,
Matt
-=-=-=-=-=-=-=-=-=-=-=- http://www.loopit.org -=-=-=-=-=-=-=-=-=-=-=- ----- Original Message ----- From: "pun chik" punchik@fastmail.fm To: pd-list@iem.at Sent: Wednesday, January 05, 2005 9:27 PM Subject: [PD] 3d sound with 2 speaker
hi, do anybody have tried creating doppler effects with pd? i was wondering if there is any external or abstraction, etc to create a surrounding effect within a stereo field. id like to create a patch using 2 speakers where a sound (an insect) flyes around you. any hint????
bye
punchik
pun chik punchik@fastmail.fm
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