[KyleGoetz]

I hear て, not た. But then again, who cares? You know 〜たあります is grammatically impossible, so your brain should immediately fill in with the correct sound. Your brain already does this with your native language. Just imagine every time you've talked on a cell phone with a bad connection.

Work hard and this will happen with Japanese, too. When I hear that audio, my brain understands instinctively they're talking about a てある construction even if I don't hear anything but かいtあります