The macosxhints Forums - buzz if sound out idle

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- Hardware and Peripherals (http://hintsforums.macworld.com/forumdisplay.php?f=21)

- - buzz if sound out idle (http://hintsforums.macworld.com/showthread.php?t=82478)

I have an identical problem to the original poster. It comes from the power supply or battery charger. When I disconnect the power from the wall, there's no more buzz.

Running WinXP on the MBP also gives a buzzing sound until it's logged in and the sound drivers activated, at which stage the buzzing stops.

Quote:

Originally Posted by fiddling_kid (Post 503421)

I have an identical problem to the original poster. It comes from the power supply or battery charger. When I disconnect the power from the wall, there's no more buzz.

You probably have a "ground loop", in other words more than one route to ground. What peripherals do you have exactly? Tell us, in detail, everything that is plugged in to the MacBook Pro, especially including any external speakers and how they are connected and powered.

Quote:

Originally Posted by fiddling_kid

Running WinXP on the MBP also gives a buzzing sound until it's logged in and the sound drivers activated, at which stage the buzzing stops.

That's very odd. You're running Windows using Boot Camp?

Trevor