According to www.analogplanet.com , the later versions of the Foz are self-calibrating.
Regarding setting azimuth by ear... some rooms are not symmetrical and there may be other room circumstances that would be beneficial to set azimuth by ear. It is more fun.
Regarding setting azimuth by ear... some rooms are not symmetrical and there may be other room circumstances that would be beneficial to set azimuth by ear. It is more fun.