On Sat, Jun 15, 2013 at 09:36:04AM -0700, Eric Carmichel wrote: > If IRs were taken off-axis (maybe they already are for the TetraMic?), > what might be the *best* polar coordinates be for obtaining a response > needed to minimize inherent or potential problems?
The calibration procedures used for the TetraMic (both the one for the Windows/OSX plugin, based on work by Richard Lee, and the one for the Linux processor which I developed) aim to get a flat frequency response of the B-format signals in the cardinal directions (i.e along the X,Y,Z axis). This is a pragmatic approach based on experience. The two procedures are different in some details but very similar, and are both based on the same IR measurements which are off-axis. The actual on-axis response of the capsules is the sum of a zero and first order component. These are separated by the A/B process, and they generally won't have the same FR. Partly because of the A/B process and the finite dimensions of the array, but this is true even for a single capsule. The actual on-axis response (as long as it's decent) is therefore not really relevant to the calibration. 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 [email protected] https://mail.music.vt.edu/mailman/listinfo/sursound
