What is this bug.?
A crackling/hissing noise most noticeable in the left ear when using headphones. It isn't present until you actually play something.
How can i reproduce this bug?
Easy plug in some headphones and play some music. When music is playing the noise is most noticeable for me at LOWER volumes below the 50% mark. Easiest way to hear it is play the song even if it's just one second and then pause. For at least 5-10 seconds after pausing it the hissing will continue.
How can we fix it?
It is definitely a software not hardware issue as the noise was not present (or at least not as prominent) in Jellybean roms. I'm not holding my breath for a fix from LG at all so we need to all dig together. For a start if someone is still on Jellybean i would appreciate a copy of your build.prop and /system/etc just so i can have a compare of those between JB and KK. If it's more related to the audio libs then i'm out of my depth!
Update. It seems that the issue is a lot less common when using the LG Quadbeat headphones that came with the phone.
LG UK tweeted a reply to this issue stating that they will pass it on to their R+D department and they will look after us as customers.
Please try and tweet LG in your territory too but please don't spam them.