On Sun, Jul 10, 2011 at 10:10:49AM +0100, dw wrote: > Any microphone capable of separating two sound sources MUST be large in > terms of wavelengths (similar to the diffraction limit for telescopes) > The soundfield microphone cannot separate two or more sound sources at > _any_ frequency for this reason.
First this is not true, second it is irrelevant. You don't need to 'separate' sources (i.e. procude signals that each contain one source) in order to reproduce them. > This does not seem to worry the 'fanboys'. Indeed it does not. The problem with higher order mics at LF is of a different nature: they require very high gains on difference signals if the mic is small compared to wavelength. OTOH, high order at low F is not essential for reproduction. You can produce 3rd order AMB with the Eigenmike. But the problem is that the frequency range gets limited at both ends as order goes up. A normal AMB decoder expects full range signals at all orders, so it will produce a poor result. It is possible to create a decoder adapted to the available frequency ranges, i.e. one that changes order in function of frequency and would be full high order only for medium frequencies. Problem with this is that there is no standard way - the decoder depends on the mic. Ciao, -- FA _______________________________________________ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound