On Tue, Jan 29, 2013 at 06:45:16PM +1100, Ross Bencina wrote: > On 29/01/2013 6:32 PM, Sven Thebert wrote: > > the delay should be within 0.5ms. > > Fons no doubt has more to add, but one way to think about delay is this: > > speed of sound at sea level = 340.29 m / s > > therefore a 1ms delay is equivalent to moving the source ~34 cm. > 0.5ms would be equivalent to 17 cm. > > Different panning/decode methods will have different tolerances to > misaligned speakers.
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. For a large installation this frequency would be set lower, so you could tolerate a bit more. But you'd also need higher order in that case to ensure that most of the energy for any source comes from the right direction. This is absolutely not the case for first order, not even with an in-phase decode, reason why it won't work well for a large setup. Ciao, -- FA A world of exhaustive, reliable metadata would be an utopia. It's also a pipe-dream, founded on self-delusion, nerd hubris and hysterically inflated market opportunities. (Cory Doctorow) _______________________________________________ Sursound mailing list [email protected] https://mail.music.vt.edu/mailman/listinfo/sursound
