Help,,PC Audio

recently my pc was fine,but it started making this weird sound,

it sound like this,RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR every time i put some music or video and i dunno what to do,tryd updating the driver but nothing.

the speakers are altec lansing,and it uses crystal soundfusion tm sound driver.

any help/ideas?

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