Tumblr video audio not working?

When I play a tumblr video, there is absolutely no sound. The video plays fine, there are no black screens, it doesn't lag. The problem is that I can't hear anything, and it used to work fine. I use Chrome Version 33.0.1750.46 beta-m and I use the XKIT extension, just in case that may have something to do... show more When I play a tumblr video, there is absolutely no sound. The video plays fine, there are no black screens, it doesn't lag. The problem is that I can't hear anything, and it used to work fine. I use Chrome Version 33.0.1750.46 beta-m and I use the XKIT extension, just in case that may have something to do with it. I'd really appreciate the help.
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