Anybody know if there's a central thread or FAQ link to discuss calibration disc issues like Avia, Sound&Vision, and VE? My searches bring up lots of either very general information about the value of calibration discs or else very disbursed micro-level issues. In short, is anyone aware of a thread on this forum or elswhere where users can get into the details of using some of the tests? I'm somewhat surprised that Ovation or Sound&Vision doesn't have something like this on their site but maybe I've missed it. Any pointers or links appreciated.