ITU made a recommendation (in around 1992-94) for surround speaker layouts. It is called "ITU-R BS.775-3"
http://www.itu.int/rec/R-REC-BS.775-3-201208-I I am not aware of any specific _standard_ for the placement of surround sound speakers. Many have followed the ITU recommendation, for example the EBU. Their recommendation is "EBU Tech. 3276-E". The BS775 describes different tolerances for different uses. In the basic form it just says that the center front speaker should be directly in front of the wiewer/listener, at 0 degrees. L and R speakers should be placed at +/- 30 degrees from the Center speaker. Ls and Rs speakers should be at +/- 100...120 degrees The speakers should be at the height of 1,2 meters. - - - The mathematicians indicate the directions counter clockwise from Center Front, 0 degrees. Directions have also been indicated in various different ways. The mess in this thread happened to start, because I used the degree figures that I read from a panning plug-in. They happen to turn clockwise. Sorry about the confusion. Eero _______________________________________________ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
