After upgrading to 10.4 and High Sierra, the audio does odd things when importing from P2 cards. Short clips are fine and the audio channels remain discreet. But anything over 3-4 minutes causes problems.
If I don't record audio on CH1, no audio gets imported at all. There's nothing in the inspector. If there's audio on CH1, then all channels become mixed and that same mix appears on all four channels.
Right now, I'm importing on an old MBP running an old version of FCPX (10.1) and then loading that project onto my new MBP. Kind of a hassle. I do not have Perian on my machine.
Thanks for any light you can shed on this issue! TV