When setting up audio for a large outdoor festival venue, it is not uncommon to have a second set of "assist" speakers about half way back into the crowd. The assist stack crispens up the audio for those folks in the back rows. These speakers are driven with time delayed audio so that the main audio from the stage stack is coincident with the audio from the assist stack. The distance between the two is usually in the 100 meter range, and the delay is in milliseconds. Obviously, the farther away from the stage you are, the larger the lip sync delay on the large screen monitors will be. After just having watched a Fourth of July fireworks display from a very close vantage point, the very long delay between the time of seeing the starburst and hearing the booming report of the shell explosion reminded me all over again just how slow sound really is! John ----- Original Message ----- From: "John Willkie" <johnwillkie@xxxxxxxxxx> To: <opendtv@xxxxxxxxxxxxx> Sent: Monday, July 05, 2004 1:11 AM Subject: [opendtv] Re: Digital, So Slow > Kent; > > Sounds pretty bad, but before one can think about the video delay, you have > to talk about 1) how far away you were from the stage, 2) describe the > speaker set up (were they all on the stage) and 3) how many feet you were > away from the nearest set of speakers. > > You were, after all, at a festival. ---------------------------------------------------------------------- You can UNSUBSCRIBE from the OpenDTV list in two ways: - Using the UNSUBSCRIBE command in your user configuration settings at FreeLists.org - By sending a message to: opendtv-request@xxxxxxxxxxxxx with the word unsubscribe in the subject line.