On Wed, 2007-04-25 at 11:33 +0200, Joern Nettingsmeier wrote: > Jens M Andreasen wrote:
> imagine you are standing off-center. all speakers start playing. two > problems: one, if the auditorium is large, the speakers close to you > might hit a lot earlier than those on the opposite side. if they are > more than about 30ms apart, the haas effect kicks in and you will > localize the sound as coming from the closer speakers. > two, if the levels of the far and close speakers differ by more than 6-8 > db, you will localize the sound at the louder source even without the > haas effect. not so much an issue, because such arrays carry a long way > and the level does not drop much. > > > > Is origo a special case that doesn't work? > > origo? Origo is the name of the center of a cartesian space where we have x = 0 and y = 0. The word "original" may ring a bell? This is where it all originates or is derived from. I am assuming a four quadrant system with negative as well as positive values to map our floor-space. > > > I would have thought it to be > > the simple base-case, even simpler than the "dropping the soap in a > > bathtub, but reversed" wawe propagation I suggested earlier. > > yes. reversed. i'm not an expert on this, but my guess is that when you > try such things, you have to take into account that it is *not* a > standing wave field. it travels, but in the wrong direction. that means > your ITD cues (interaural timing difference) will be wrong. Well, I am certainly no expert either but I know that we can sometimes be easily lured, not being able to tell the difference between a pre-delay and a post-delay. What is at play her is that there is a stronger signal present that we prefere to believe in. So it is acceptable with a weak pre-delay signal from certain speakers close to you, as long as you will immidiately after be overwhelmed by a stronger signal showing "the true origin" of the signal. /jens _______________________________________________ Linux-audio-dev mailing list [email protected] http://lists.linuxaudio.org/mailman/listinfo.cgi/linux-audio-dev
