Apple Final Cut Pro 7 - Manual (Page 310)

If you want the ability to recapture your audio again later, you need to capture from
media that has timecode using a deck that supports device control. One solution is to
dub your audio onto a tape format that has a timecode track, such as DV or Digital
Betacam. If you dub your audio to DV, make sure you use 16-bit (2-channel) audio mode
so you record at the highest possible quality. Once your audio is transferred, you can
capture your DV audio clips using FireWire and DV device control, the same way you
would capture DV video clips.
CD
Cassette
Media without timecode
DAT with
timecode
DV tape
Media with timecode
DAT without
timecode
Capturing Synchronized Audio Independently from Video
If you are editing material acquired via dual system recording, meaning that video and
audio are recorded simultaneously to different devices, you need to capture your audio
and video separately and then synchronize them together in Final Cut Pro. After capturing,
you can combine the corresponding video and audio clips into a merged clip. Merged
clips work in the same way as other clips in Final Cut Pro, but they refer to separate video
and audio media files (whereas most other clips, such as clips captured from DV tape,
refer only to a single media file that contains both video and audio). For more information
about merged clips, see
“Merging Clips from Dual System Video and Audio.”
310 Chapter 19 Capturing Audio from Tape