Solving it will require further investigation and some searching with more specific information.
The nature of the buzzing sound might give some insight - e.g. a low hum may be mains interference.
Other information may be key, for example, is there a pattern to when the noise starts ?
If it starts consistently at exactly the same time into a playback or game then it suggests something different to if it occurs more randomly.
To see your set up
Open a terminal (press three keys Ctrl Alt T together)
Then type or paste this command into the window.
inxi -FxxxrzThis will display information about your system which you can copy and paste back in this thread or use when searching the Internet for similar problems.
Doing some simple tests may help isolate the problem, for example with nothing else running, type or paste this command into a terminal window.
speaker-test -c 2 -t wav
You should hear speech alternating from left and right speakers and in the terminal window there should be a description of what is being output.
If you have more audio channels you can change the -c number.
Allow this to run until the problem starts.
You can stop the speaker-test by selecting the window and pressing Ctrl and C together.
If the buzzing doesn't happen in this simple test with nothing else running it adds a bit more diagnostic information.
To see a representation of what the audio system is doing.
Click Menu and begin typing 'Volume Control' into the text box
When you see the Volume Control option offered, click on it.
This will open a window showing an overview of your audio.
In the Playback tab, you should see a representation of possible sound sources.
Select 'All Streams' from the 'Show' pull down.
With no sound being generated, you should just see 'System Sounds' and a static bar
Try re-starting the speaker-test - this should add a more dynamic bar to the display.
You should be able to associate the moving graphic with the actual sound produced.
Add another sound, e.g. by playing an audio file, this should add a further graphic along with the speaker-test.
Allow this to run until the buzzing sound occurs.
If the buzzing is being originated by the system, you'd expect to see a change in the representation and be able to determine which applications produce it.
If the buzzing sound doesn't show up obviously on the 'Volume Control' playback window, it suggests it might be external.
Continue to experiment until you can reliably reproduce the problem with the minimum number of things running.
