If you aren't able to use an audio recording app on your iPad for whatever reason and need to resort to using the Camera app to record audio (long story), you will get a bunch of .MOV files.
So I wrote up a script that employs ffmpeg to extract just the audio from each file in a subdirectory, and then combine the separate audio files from that subdirectory into one audio file.
Script here: ExtractCombineMOVtoMP3.py