I am trying to pull the audio out of a video file
Be more specific.
Ripping the Audio from a muxed AV file is easy. I use Adobe Audition, but Soundbooth will do the same thing. Also, if one has neither, then the free Audacity can do just that. Once ripped, Save_As PCM/WAV @ 48KHz 16-bit, and you then Import that WAV file.