I can't seem to find anything on this, so I will ask. A client sent us a company produced interactive pdf and wants us to use the audio from a video clip that is in the pdf. We asked for the audio clip but they don't know who to get it from and just keep saying it is in the pdf. While others try to explain that a pdf and an mp3 are not the same thing. I get to look into a fall back position of trying to extract the audio (or video). There is no copyright issue here. Client peon just can't/won't get the proper file.
Maybe some one can help or point me to info that says it is not possible.
There is software available to capture anything that would play through your speakers by capturing the output before it hits the speakers. On the Mac, I have used Audio Hijack and WireTap Studio. I am sure there are similar programs for Windows.
WireTap Studio did the trick. I downloaded a free Trial version and bob's yer uncle.