On Tue, Sep 20, 2011 at 12:26:54AM +0300, Sampo Syreeni wrote: > Though perhaps more surround than most would think. Come with me, here: > if you take a look at the compensation circuitry which turns A-format > into B-format within the conventional SoundField microphone, isn't it > pretty much *exactly* a 3D Blumlein shuffler?
It's not the same. The shuffler is designed to process signals that have no significant level differences in the frequency range it handles, just the phase differences. It is normally used with omni mics, or directional ones pointing in the same direction. The capsules in an A-format mic are directional, also at those frequencies where phase difference become significant, and the basic A-B processing is based on that directionality while the phase differences are just a nuisance. OTOH, the shuffler algorithm is exactly the one used to extract the Ambisonic X,Y,Z signals by mics using omni capsules on a rigid spere. Ciao, -- FA _______________________________________________ Sursound mailing list [email protected] https://mail.music.vt.edu/mailman/listinfo/sursound
