You can use software like within Compressor or CinemaTools to confirm the timing to 23.976. There is a app by Red Giant, Grinder that can also do it. Doing it with the software does it the same as what the HVX is doing.
You have to use a program like Cinema Tools (which comes with Final Cut Studio).
- Right click and open the clip using Cinema Tools
- Bottom right hand part of the screen in Cinema Tools, there's a button that says "Conform." Click it and choose 24fps or 30fps and then you're done.
The clips automatically change after you click the conform button, even in final cut.