@bababouy
There's a thread here that goes into depth on audio recording, with different opinions:
Too much IR
Here's a thread about the police asking for recorded footage, and the user was recording audio, and so members share opionions on audio legality and practicallity, using an actual "multiple shots fired" event...
The police want a copy of Dahua hard drive to investigate B&E
What are you covering yourself from? Lawsuit? You are the only one that knows that audio is being recorded and the only place or time that you may have a problem is if the video is used in court, which you would just not include audio in the video that you provide to the detective.
I was thinking along those lines when deciding on signs. I read a story where the neighbors weren't getting along. Up goes a camera. Neighbor sues. NVR owner served papers, along with requirement to turn over recordings.
At this point, scrubbing audio is in violation of the court order. Akin to tampering with evidence? (I'm not a lawyer, lol)
Audio recording: If provided voluntarily, that's one thing. If you're charged of improperly recording a conversation (neighbor, disgruntled neighbor), that's another kettle of fish....
Murky water....