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Author Topic: Surround delay time calculation Daveston Ahimaz Film Handler Posts: 3 From: 46000, PJ, Selangor, Malaysia Registered: May 2011 posted 06-05-2011 02:20 AM                        How to calculate the time delay for the surround speakers in a dolby EX theatre?  |  IP: Logged Dominic Espinosa Phenomenal Film Handler Posts: 1172 From: California, U.S.A. Registered: Jan 2004 posted 06-14-2011 05:29 PM                     Sit in the middle of the room and see how poorly out of synch it is with a test reel/loop/dcp. Or else RTFM?  |  IP: Logged Richard Hamilton Phenomenal Film Handler Posts: 1341 From: Evansville, Indiana Registered: Jan 2000 posted 06-14-2011 07:28 PM                     what processor?  |  IP: Logged Harold Hallikainen Jedi Master Film Handler Posts: 906 From: Denver, CO, USA Registered: Aug 2009 posted 06-16-2011 10:46 PM                        Since there has not been a whole lot of response, I'll give an opinion. Since surround speakers in a 5.1 system typically extend partway along the back wall (an L shaped array), it seems that the delay for rear wall surround speakers will be about the same as for the surround speakers. The distance from the screen speakers is not significantly different. The formula I have for surround delays (from the USL JSD-100 manual at http://www.uslinc.com/images/products/download/Jsd100Manual0111.pdf ) is: The surround delay is set based on the length and width of the auditorium. Formulas to determine the surround delay with auditorium Length and Width in meters and feet are provided. Surround Delay Using Meters. With Length and Width of the auditorium in meters, the surround delay, in ms, should be (L/3)‐(W/6)+20. Surround Delay Using Feet. With Length and Width of the auditorium in feet, the surround delay, in ms, should be set to L‐(W/2)+20. I look forward to hearing any other opinions. Thanks! Harold  |  IP: Logged Daveston Ahimaz Film Handler Posts: 3 From: 46000, PJ, Selangor, Malaysia Registered: May 2011 posted 07-15-2011 11:23 PM                        Thank you Harold. I will try what you have suggested. Richard i am using the Sound web London BLU-160 4 units linked with the blu link.  |  IP: Logged

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