hey, i have been using both fcp for a long time, and also the zoom h4n a fairly recent addition. the previous post was absolutely right. fcp defaults to 48K so better to use the 48K option for the zoom h4n recordings. just a word about the h4n….. make sure to use the windscreen if outdoors, always….. and set yourself up w some decent isolating earphones to always monitor what is happening on the h4n. those mic’s (the built-in’s) are really good but are very sensitive to air pressure so if interviewing a subject keep the mic about a foot away from the speaker or even with the windscreen you may have to intuit some placement distance that works for the subjects delivery. on the other hand if you are using the recorder to pick-up ambient sound, room sound, etc….. it’s great with the built in mics.
good luck.