[FIX]Note 2 crackling sound in earphones randomly
I faced this annoying problem where earphones made crackling sound randomly while playing music only while screen was off.
I saw another thread where people faced same problem in S III, but no definite solution.
You need to be rooted.
Just change your CPU governer to "On Demand".
Mine was set to 'pegasusq'. I believe it forces CPU into low power mode while the screen is off and CPU frequency becomes so low that read speed of music files reduced.
Above FIX resolved my issue. I wanted to share so that anyone suffering from same issue can be benifited.
I am not responsible for any damage caused to your device. This post is just a workaround if you are rooted user. If you don't know anything about rooting, please explore the forum first.