Whelp, I can now be counted amongst those who have been driven nuts by the MA 1 software. I finally had an opportunity to run through the process before starting work. I got everything set up and configured, carefully measured and adjusted the mic for each position (which is quite tedious to do properly), and arrived at measurement 6 of 7. A loud car drove by while the test tones were running, so I figured, no problem, I'll just repeat the last position. Nope! The software panicked, said "too much background noise!" and took it all the way back to position 1. Ugh! There goes what was probably my only opportunity to have a quiet house this week. And I will apparently need to implement a police barricade on my street for the next attempt.