Good Afternoon, Gents, I also have experienced this same issue with a different setup just a few days ago. I went old school miniDV into FCPX. Low and behold no audio upon import, no audio in timeline and finder too. Tried troubleshooting 101 and swapped the cable, no dice. Grabbed the footage and deleted from FCPX and said let’s try iMovie as a test. Exact same thing, video yes, audio no!. What the sugah! I launched Adobe Premiere and used the Capture feature. Boom! AV coming through like a bull in a chine shop…what gives? Any feedback or solution would be greatly appreciated for FCPX.