Here is my issue. I have a project with footage shot on a Sony A7Sii at 23.986fps and footage shot on a Panasonic GH4 at 24fps. I am encountering audio sync drift between the two shots. Master audio is on the 23.986 footage but I have tried using project settings that match the Sony and I have tried project settings that match the Panasonic and the audio still drifts either way I try it, even though FCPX is supposed to do an automatic rate conform from one frame rate to the other. Has anyone else encountered this? A google search only yields results for 24P vs. 30P etc.
Do I need to select something else under rate conform, or run the 24P material through compressor first? If so, what settings do I make to make sure it does the conversion correctly.