Hi, does anybody else have a slight raffle/ muffled sound coming from their internal speakers when playing audio at about 80% volume? It also happens with the clicking noise when adjusting the volume level and in other programs but doesnt happen with headphones/ speakers so its not a software problem. Its only the left speaker of my MBP, which came on quite suddenly. Its very annoying and quite worrying since its predominantly a music production/ DJ'ing laptop. Any ideas what could be causing it? Any solutions? Thanks.