Forum:KB:TIE fighter sounds in Massacre

I was watching "Massacre" on the Star Wars official site and when the tri-fighters and vulture droids flew across Dathomir and the tri's shot their blasters, the sound was a TIE fighter blast. Any explaination? For a referance, it happens a little after 7 minutes, 15 seconds on the Star Wars site in which I watched it on. Thanks The Awesome X!