The audio output of my MacBookPro4 with Snow Leopard is very noisy. Right after I start some sound player software, a loud white noise starts on the standard audio output (the jack for the headphones) and it can be heard during the whole audio playback, and some time after the audio stops (I guess until the audio player software switches off the audio device).
I can confirm that not my sound files neither my headphones are noisy (I played the same files with the same headphones on an other computer and it's ok) but the noise comes from somewhere the OS / hardware.
Did somebody experienced similar thing? Can something be down from software? I would prefer to identify to source of the noise and eliminate it instead of installing some noise filter software. Or if it is a hw problem, could you suggest me some solution?