Greetings all, This is probably more for developers, but I don't subscribe to that list and don't intend to, hence... I have published some notes on the use of Green's functions in audio. I have used the techniques described to create accurate 3-D stereo images as well as to produce instruments. I hope to release software some day. Meanwhile, for those with some knowledge of mathematical physics, these notes may prove to be helpful. These notes are rough drafts, so please do contact me regarding errors; my email address should be easily recontructable from the URL below. http://home.earthlink.net/~davidrclark/linux_audio_users/index.html File: greens.tgz Contains five notes: greens_3d.pdf (Green's Function Method for Creating Accurate Stereo Sound Images) greens_3d_vol.pdf (Ibid: Volumetric Sources) greens_cyl.pdf (Ibid: Cylindrical Volumes) greens_1d.pdf (Ibid: Simple One-Dimensional Example) greens_plucked.pdf (Ibid: Simple Plucked String) For those who have not yet heard the old demo (January 2004), it's at: http://home.earthlink.net/~davidrclark/latest.mp3 with description at: http://home.earthlink.net/~davidrclark/latest_mp3.html Some time ago, people have suggested a plug-in. I've given that some more thought, but I don't think it'll be easy to do. I wish it were. Also, I just don't have the time to work it all out in detail. My methods work fine for me at this time. Dave.