Ross Bencina wrote: > If you're outdoors then you can use GPS time for synchronization. In > which case you can just program everything to start at a certain time > and forget about communication.
Fons Adriaensen wrote: ... > You'd need to keep > the delay differences to within at least 0.5 ms or so. This could be > quite a challenge. Fons Adriaensen wrote: > That 0.5 ms is just a rough estimate, based on the fact that you'd > want to preserve more or less correct phase up to a few hundred Hz, > where a decoder would crossover from systematic to max-rE or in- > phase. Because of upper-atmosphere propagation delay, the raw time in a GPS receiver is only good to 1 ms or less. This is one of the errors the WAAS system (or EGNOS/MSAS/GAGAN system) corrects, but WAAS is only used by the more expensive GPS receivers. Given the number of GPS receivers required (one for each speaker), and the need for better than cheap & cheerful, GPS would likely prove to be expensive. Regards, Martin -- Martin J Leese E-mail: martin.leese stanfordalumni.org Web: http://members.tripod.com/martin_leese/ _______________________________________________ Sursound mailing list [email protected] https://mail.music.vt.edu/mailman/listinfo/sursound
