Buzzer-like sound at 3:20am in the cursed house

[Dennilson]

At 3:20am every night in the cursed house, a buzzer sound goes off. I tried clicking intercoms and phones but nothing happens. Seems to consistent for there not to be something to discover from it. Has anyone found what you need to do to trigger anything?

[GX7]

It's been a while since I've played OD2, but I think you might be referring to the de-activation of the secondary camera. I believe it stops working at about 03:30 and I am pretty sure there is a buzzing sound when this happens.

[Dennilson]

That'd probably explain it, thanks.