I've just been shooting a pilot for a sitcom and I'm editing it now but I got a couple of audio files that don't sound great and I need to fix them, but I'm not too hot with audio editing software so I was hoping someone out there could talk me through some work arounds. I've attached the problem files. The first one has an annoying high pitch noise running all the way through it, I need to find a way of removing it, the other 2 just came out very quiet so I need to increase the volume a bit, which I can do but I then have the problem with a hiss in the background when I increase the volume which I need to remove. I have access to Adobe Soundbooth and Apple Soundtrack Pro. Thanks for any help.