30 seconds after sound ends, I hear snap or pop in the headphones

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hello,

mbp 2010 15", 30 seconds after sound ends while using headphones (either of 2 pairs), hear pop or snap in headphones. happens after playing youtube, or after using mplayer in terminal. haven't used itunes extensively can't whether happens app.

not happen under windows 7 @ all, have installed in boot camp partition.

did little google searching , seems people occurs because os turns off sound card save power, in ungraceful way. person reported had no problem under windows xp did see problem on multiple mac laptops.

1 person in 2008 said found utility tricks os thinking sound card playing audio, power-off , therefore pop or snap sound no longer occur, utility seems ppc-only binary & anyway hate running unofficial utilities.

here know if there way fix problem?

suppose write bash script plays all-zeroes wave file every 25 seconds, kludge.

thanks.
 

have u tried different headphoens see samething happens?
 


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