Oh, I see. You have the files on your iPhone and are recompressing them to transfer them to PC. Is there no way of transferring them without recompressing them? I’ve no experience with iPhones, so I can’t suggest a method, but I’d imagine that there’s a way of copying them onto some sort of drive and from there to the PC.

Failing that, please provide a sample that’s not been through Vegas, because that’s adding another step to the process and another lossy recompression. It might be best if you upload an episode. 3GB isn’t that big.