On Mon, Jun 17, 2013 at 10:24:58PM +0200, Jörn Nettingsmeier wrote: > that's the main problem with the eigenmike: the higher the order, > the narrower the bandwidth and the higher the lower boundary. which > means that an eigenmike signal set will not usually be > downwards-compatible - if you aim for a correct amplitude response > for the full 4th order set, it will sound duller and duller the more > orders you truncate. it is possible to generate a spectrally correct > output for each subset of orders, but that has to be computed from > the a-format, with a priori knowledge of the playback order.
For 4th order, the lower limit is around 1kHz, which is well above the range where you would use a 'max rV' or systematic decoder. And even that requires extremely accurate calibration. The problem is that extracting the higher order signals requires amplification of tiny differences between the capsule outputs, and even the smallest gain differences will result in the wanted signal being swamped by amplified errors. For third order the limit is around 400 Hz, again assuming very careful calibration (and stability). 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 Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
