Music stutters/crackles/pops/pauses/lags problem. On my NEO with 20140112 cm10.2 build.
Here is my solution, works for the past 30 minutes.
1. change read_ahead_kb back to 128. (minor, maybe placebo at the first place)
2. change cpu min freq to 368mhz or up. (I am using interactive, 1600mhz to 368 mhz)
3. change the IO scheduler to ROW. (may be the key)
4. quit some background app (e.g. setxperia in my case)
I am playing some music with apollo w/o dsp. No stutter or anything for the past 30 mins, screen on/off, VS it stuttered 1-2 times every few songs before the changes.