I need to add a pre-produced 24fps video in with a 30fps video...

And when I do, the 24fbs video audio is pitched up. Any tips? Using Final Cut Pro X. That's what I have available to me, so please don't say "Use Premiere." THANKS! via /r/videoproduction https://www.reddit.com/r/videoproduction/comments/5t3i92/i_need_to_add_a_preproduced_24fps_video_in_with_a/?utm_source=ifttt