Hey guys, So I'm in a lecture as I type this at university on my 15" 2.4GHz SR/4GB. I accidentally hit CMD+F5 on my Mac a few minutes ago while aiming for a Photoshop shortcut and activated OS X's voiceover feature. It continued to narrate very audibly even though I muted the speakers (voiceover would re-enable as soon as I did something). I had to plug in a pair of headphones to get into the preferences and disable voiceover and re-mute the sound. By this point the system has made more than a couple embarrassing sounds in a lecture hall of a couple hundred people, and my Adium/Growl then made another login sound a couple minutes later as apparently I had missed the 'mute' button'. So, while I know this has nothing to do with OS flaws, I'm looking for a way to disable the internal speakers in a way that requires specific user input to re-enable them. Just a piece of software (or a script/command line) that will 'hard disable', as it were, the speakers, just for that peace of mind that I can't accidentally un-mute at the press of the wrong key or key combination. If anybody has a solution in mind or knows of a piece of software that would accomplish this, I would appreciate your input. Thank you very much in advance!