Wouldn't his technique require the listener to be sitting still and have his ears in exact specified locations? Not very practical then if that's the case. I gu

Wouldn't his technique require the listener to be sitting still and have his ears in exact specified locations? Not very practical then if that's the case. I guess the system can include some sort of (visual) ear recognition and tracking logic and adjust the cross-talk filter respectively, but (a) that's pretty far off (b) still won't work for more than one listener. Moreover... > The filter is designed to work with loudspeakers - not headphones Because regular stereo in headphones already has no cross-talk, so it is naturally 3D. And this leads to the trivial 3D stereo solution (if one really wants it) - just put the headphones on.