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Holy Crap, Hal is in my Computer

January 25, 2009 By: Nick Keenan Category: Teachable Moments

After disconnecting my speakers from my macbook, I noticed that my built-in speakers were suddenly not working. On further inspection, I was very surprised to see a red light coming out of my headphone jack.

While it is technically a hardware failure, I was kind of amazed to see it. Apparently, the headphone jack can alternate as an optical sound output using an adapter like this one. I feel like a rube for not knowing about this beforehand. The best part? The digital signal this spits out is Surround-Sound Ready and it looks fairly pro-grade. I’m trying to find how many digital outputs this is capable of spitting out … I’ve seen some reports that it can handle 6.1 Surround, which is 7 discrete channels of audio. Not too shabby for not having an audio interface.

If you work for Apple or Applecare, this is all your fault. Now stop reading. Okay, everyone else: this red light issue might happen to you by accident if you’re as rough with your headphone jack as I am. If your macbook volume is suddenly not working, check for the red light. Never fear if the light does show up, just insert a mini cable or gently insert a toothpick into the port and wiggle around a bit, you should be able to relatch the output into place so that the digital output shuts off and the standard analog headphone jack (and your built in speakers) starts functioning again.

Just don’t be *too* rough. 1/4″ and 1/8″ headphone jacks, while ubiquitous, are also a very flawed design. It’s very easy to bend an internal connection in these ports, rendering the jack useless. If you want to use the jack… yup, it’s pretty much new logic board time. Having done that a couple times during tech weeks, trust me: Avoid at all costs. So be gentle to your lappy. Maybe someday they’ll start making mini-XLR or Neutrik jacks for headphones, and we won’t have to worry so much. But they probably won’t be awesome enough to have an optional digital output.

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