The attack noise for the Guardian mob used to play frequently as background noise before i loaded the pre-release, but once I loaded it, it plays non-stop. The world im playing in has an ocean monument not too far away, but definitely far enough to not play the sounds at all. I tried going into creative mode and flying up really high, and looked at my Fn+3 menu, and saw that it was playing 2-3/247 possible sounds. I tried turning off each individual sound type and this resulted in just 1/247 sounds, still playing the noise.