Aloha, last night (3:00 am) and I think at least once before, my computer made several loud beeping sounds (almost like a smoke detector) via the powered speaker (I think, because it was so loud, so not the sytem speaker) plugged into the audio jack. I sure didn't want it to do that (woke me up) and I am trying figure why this happened.

I've tryed reading many of the logs found under /var but none of them seem to contain the info I am looking for. Is there a log that tracks audio events? My guess is probably not. So if not, is there a way to create one ?

I realize that I can turn off the computer or the speaker before I go to sleep but those simple solutions won't work for me because I have a program (TWS, Trader Work Station, from Interactive brokers) that I do create alarms with that respond to price action in the financial markets. Last night that program was turned off and the markets were closed yet this loud beeping occurred so I really doubt that TWS has anything to do with it.

Welcome to LinuxQuestions.

My first guess is some sporadic EMI getting into the speaker and not generated by the computer. Like a car passing using a mobile radio.

OK, thanks michaelk. It hasn't happened again, so hopefully that's all it was.