Listening more, there's a very distinct high pitch ringing audible @ 28:40 - do you remember if this was in the room or do you think it's the mics?
Have you ruled out your playback system as the culprit?
Yep- I played it both with my work headset & just holding my iphone up to my ear after seeing this post, and can hear it from both sources- if both of you aren't hearing it, it might be one of those 'higher frequencies that only certain ears can hear' type of things. Note that it doesn't begin at 28:40, I was bouncing around the audio clip and it stuck out at me when I went there to listen to a lower volume song. Try clicking on 8:40, listening for a sec, and then going to 14:00? It's not audible at 8:40, and clearly audible at 14:02, and there's almost no other sound at both these times.
Anyway, I doubt it's the mics, since I would expect it to be consistent at the moments of dead air if it was the mics. Sorry for lil derail, and thx again for the clip. I'm in the market for some supers and am definitely eyeing these a lot