Look into the Haas effect and also changing phase along with delay time.  Roland had a technology called RSS that could do pretty wild things with the stereo image based on phase and delay.

On Fri, Nov 13, 2009 at 5:20 AM, Johannes <THIS_IS_POP@web.de> wrote:
thanks guys,

andrew, nice that you wrote about the logic imager. i was inspired by it to think about how the imager effect workes.
do you think there is no delay between the channels at all? is it just stereo filtering?

any other voices on how to build an imager in pd?

jo