On Mon, Jun 03, 2013 at 08:10:29PM +0530, umashankar manthravadi wrote: > I am a little confused by this discussion.
No surprise, a lot of issues got mixed up in this thread: 1) Can a 2D (horizontal-only) playback system generate plane waves (that do not attenuate with distance) ? 2) Will using some filters help to achieve this ? 3) Is there a fundamental difference between B-format signals produced by a tetra mic and A/B processing and 'native' B-format obtained directly from capsules ? 4) Given W,X,Y,Z, and when using a horizontal decode, is it possible to replace W by something that would match the vertical pattern of X and Y ? The answers are no, no, no, and no. (4) can be approximated by using higher order signals. > isn't even a single microphone (of whatever pattern) picking up > z axis signal as well the direction intended? isn't there some z > signal even in standard m/s or x/y recordings? Depends on what exactly you mean by 'z axis signal'. 1) A signal from a source not in the horizontal plane. All mics will pick up such signals. 2) The signal corresponding to a fig-8 pointing up. Only a fig-8 mic pointing up will produce that. 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
