Beware of Mixing Different Sample Rates in FCP Sequences
It is strongly recommended against using mixed sample rates in Final Cut Pro projects. Mixed sample rates are the major reason for audio slowly drifting out of sync and drop-frames. Make sure you are grabbing audio at 16 bit in camera and that your sequences settings in Final Cut Pro match your footage. If you are planning to present your work as a DVD, then you need to be at 48k in the first place. If you are planning on using CDs or MP3s in your project, MP3s being the worst of the group due to extreme differences in sample rates, and CDs coming in at 44.1k, use iTunes to convert all of your files to 48k before using them in FCP.

