On Mon, Jan 17, 2011 at 07:51:54PM +0000, d...@york.ac.uk wrote: > I'm wondering if the phase anomalies could be employed in a > positive fashion. Since, in this case, on the 6 pole designs at > higher sample rates the problems are worst (or can be made to be > worst) at the low end, maybe this could be used, for instance, to > ameliorate the problems caused when cutting vinyl if there is heavy > bass components in the rear. And, yes, this is a real, current > problem - just been involved in just such a project!
You could probably modify the encoding to reduce the phase difference for back signals (normally 115 degrees) to some lower value. Meanwhile I've recomputed the effect of small quadrature errors on the stereo signal. A phase error of +/- 4 degrees will result in: * an error of +/- 0.35 dB in the relative levels of L and R, * an error of +/- 0.6 degrees in their relative phases, for most of the front region. Both are slightly worse in the the back region, but still no cause for concern. Unless of course your speakers are matched to this kind of precision over the full frequency range, AND your head is exactly on the center line and clamped in a vice. Ciao, -- FA There are three of them, and Alleline. _______________________________________________ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound
