As best I can tell from their videos and website, this SW 30 Cal file is intended for use with their Software only. The instructions say use the 30 degree file, while pointing the Mic Horizontal, 0 Degrees, Straight ahead. They do provide a regular 0 degree Cal File for use with other software. Afaik, they do not include a 90 file which diminishes the XREF mic somewhat in my eyes. A further caveat, SW seem happy to recommend handheld measurements. Without further information as to why, I suggest it always better to use a mic stand to avoid movement and proximity of the human body.