Here is a different portal, this one in the UK and made from rubber: http://www.jay-harris.co.uk/tag/ambisonics/
Maybe two sound portals so close together was a fluke, or maybe this the the killer app for Ambisonics. Regards, Martin -- Martin J Leese E-mail: martin.leese stanfordalumni.org Web: http://members.tripod.com/martin_leese/ _______________________________________________ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound