MBP 15" Late 2011 Lion audio noise Today I noticed something unusual on my MBP's audio.

When I played some music on youtube today, I noticed that something was different. The sound is noisy, like when in a car, you put the volume very high, it starts distorting. But, on low volume on my Mac, it creates the same effect.

Anyone with the same problem? Anyone knows how to fix it? It didn't do it earlier... Maybe some SO update messed up the audio drivers/codecs?


  Update:
  I performed a PRAM and NVRAM reset and a SMC reset and it didn't solve anything.
  
  Also, deleted the *.plist files in ~/Library/Preferences/Audio as suggested here and again, it didn't solve anything.
  
  I'm getting desperate...
  
  Update2:
  Got in recovery mode, started Disk Utility and used the options Fix disk and Fix disk permissions and once again, it didn't solve anything.
If all sound from your machine is distorted there may be a hardware problem with your Mac's speakers.

To test, I would reinstall Lion from your recovery partition and see if it is the same. If you still have problems with the sound you should take your Mac to an Apple Authorised Service Provider.