iMac speakers crackling after Mavericks update

[dizzy960]

Hello,
Since updating my early 2013 iMac 27" to OS X Mavericks whenever I play audio (especially music) through the speakers or headphone port there is a crackling distortion to the sound, this is most apparent on mid to low notes. I believe this to be a software problem rather than a hardware problem as I did not experience these issues in Mountain Lion before updating to Mavericks. Any help would be much appreciated thank you.

 

[boombox15]

My 21.5 inch iMac does that to, but it's barely noticeable. Looks like it should be fixed in a future software update. 10.9.1 or 10.9.2 should do that.

 

[bp1000]

Can i check that this happens just with music and not when the screen brightness is down low?

Mine crackles intermittently with low screen bright - the sound emanates from the bottom left, randomly.

 

[MikeChicago]

Interesting... I've had some sound crackle during gameplay on some games under Mountain Lion which were resolved with Mavericks... I guess I have the opposite outcome. Weird.