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He was probably outside in a van with a 900 mhz video transmitter. I have a friend who built a little battery powered one and transmitted video as he walked around town. There's pretty good range. Mark Tom Ritchford wrote: > > A few months ago in Berkeley, California (at the Starry Plough Pub) I > saw a > > guy play guitar. Next to him was a video monitor of his brother in > New York > > playing drums. They were both in perfect sync as if they were in the >same > > room. > > > [snip] > > > How is this possible? Even if it were a direct satellite TV broadcast > > connection there would still be a noticeable delay - right? > > The speed of light is about 186,282 miles per second, > so it takes at absolute minimum about 50ms to go from > New York to LA. > > If there's a satellite, there's perhaps a few milliseconds > more time spent switching. > > 50ms is quite noticeable. You can play a single note > almost that fast (drum rolls are faster than that!) > > Now, if it's the Internet, there's a LOT more delay than that. > Plus, the delays are variable so you need to pick the > longest possible delay to avoid cutoffs. > > 200ms is not unlikely. Even Internet II won't > slave much off that. That's one-fifth of a second! > > If the drummer didn't try to listen to the guitarist, > it'd work really well, from where you sat and > watched the guitarist. > > /t > > -- > > I am the wombat.