I noticed (on all versions) a bit of a blurb or blast of audio when hitting the mic button out of each camera. It was as if the sound was what was left in the cam's buffer, not a BI issue seemingly. I wish the "talk" feature was more supported within BI. You can't bind a key to talk. Only placing mouse cursor over and clicking, or hitting mic in the BI Mobile app work. No third party JSON, etc, interface to this function. I have a microphone and I want a button to do the talking (thru an arduino com port, etc). That's really out of reach.