Recording noise and flaws (tape hiss, bad mike, person
too far away from mike, old tape, micro tapes, etc)
Exterior noise ( trucks, restaurant/bar, music,
airplane, background conversations etc.)
Heavy accents (Foreign or English), speech impediments,
people consistently talking on top of each other in an unstructured meeting.
Skipping of audio that is not to be transcribed ( such
as lunch breaks during meetings) which we must spend time to sit through.