Sorry I forgot to include this but yes, I record the audio with all of the cameras with the included microphone for reference in editing. I do not use this recording given the amount of ambient noise that is captured. My problem is not with syncing but with the fact that the audio that is recorded from the individual microphones of each speaker, seems to be slower, given that i sync it correctly in the first couple of minutes but it gets out of sync by itself by the end of the reocrding.
The files i give him are .wav and he gets them through a normal external HDD.