Have listen to the sound clip he linked to, you’ll understand what happened - very high SPL.
yes, high SPL, w/ no pre-amp gain control, through the Apogee Ambisonics app. I used the low level "concert" setting, & it's still way too hot...
I took them to another show, indoors, at an old theatre, & it was even worse. Luckily I recorded w/ the ZoomH2n & got some sound...
All it needs is a gain control, that really should not be too much to ask for, but apparently is... I wonder if Apple has these companies hamstringed, because I downloaded another app, supposedly made by the same dev that makes Audacity, & same thing, no input control. It would be best though, to have an inline gain attenuator, to lower the gain going in to the Apple pre-amp...