Theory: you have a cron job running at :29 and :59. It's doing some sort of activity that generates RFI. The old speakers, or perhaps the wires to the speakers, act as antennae and pick up the signal. You never noticed it before because traffic noise was always louder. Now that everyone is staying home, there's no traffic noise. So now you hear it.
--Seth On Tue, Mar 24, 2020 at 10:23 PM Michael Barnes <barnmich...@gmail.com> wrote: > Not really Linux related, but very strange. I have a real nice set of Altec > Lansing computer speakers hooked up to one of my Linux Mint machines. This > is a three piece set with two desktop speakers and a large subwoofer on the > floor. I've had these speakers for at least ten years and they have always > worked and sounded good. I hooked them up to this computer about a month > ago. After a couple weeks, they started making a very loud low frequency > beep/buzz every thirty minutes. It is about a one second burst. I turned > them off with the on/off switch on the volume control, and the beep > persisted. At exactly :29 and :59. I unplugged the audio input from the > computer speaker jack and the beep continued. There is no kind of logic > circuitry in this thing. Just an audio amplifier and related electronics. > The only way to stop it is to unplug it. When plugged in it is like > clockwork at exactly :29 and :59, regardless of whether it is connected to > the computer or not. I hooked up another set of speakers to the computer > and they do not do this. Sad, because these are a great sounding set of > speakers. > > Anyone run into something weird like this? > > Michael > _______________________________________________ > PLUG mailing list > PLUG@pdxlinux.org > http://lists.pdxlinux.org/mailman/listinfo/plug > _______________________________________________ PLUG mailing list PLUG@pdxlinux.org http://lists.pdxlinux.org/mailman/listinfo/plug
