brilliant thankyou Jörn, so with two capsules pointing in opposite directions Im kind of faking a figure of 8 with 1 capsules by artificially phase inverting one channel - which would happen naturally with a one capsule figure of 8, I have more questions - but I think ill give you guys a break for a bit and do some more reading before I come back to mither - but thanks again for all the info (=;
> we cannot hear absolute phase, so if you are listening to a figure of > eight microphone, there is no way to tell whether the sound you're > hearing was coming into the (positive) frontal lobe or the (inverted) > rear lobe. hence, the only information we can get from a lonely fig8 is > "it's obviously not coming from the side". > > now if you add an omni to the equation, all of a sudden you have the > possibilty to discern between the two lobes of the fig8: one is in-phase > with the omni, the other isn't. > > thus, the 0th order component helps you resolve the ambiguities of all > the 1st order signals. > > btw, if you move to second order, the situation is the same: with a > cloverleaf directivity, you only know "it's either coming from > front-or-back, or from left-or-right". only with the first-order > information, the ambiguity can be resolved. > > W also has a subtle role in distance coding, but its main job is really > to help us make sense of the fig8s. > > > to wrap up, three real fig8s won't ever give you ambisonics. but if you > obtain the fig8s by subtracting two back-to-back cardioids, you can also > add them, which then gives you a nice omnidirectional component. note > that you will have to attenuate the resulting omni signal according to > the number of capsules you used. > > > best, > > > jörn > > > > -- > Jörn Nettingsmeier > Lortzingstr. 11, 45128 Essen, Tel. +49 177 7937487 > > Meister für Veranstaltungstechnik (Bühne/Studio) > Tonmeister VDT > > http://stackingdwarves.net > > _______________________________________________ > Sursound mailing list > [email protected] > https://mail.music.vt.edu/mailman/listinfo/sursound > _______________________________________________ Sursound mailing list [email protected] https://mail.music.vt.edu/mailman/listinfo/sursound
