If you don’t hear any audio, you probably have your output set to FireWire, but don’t have any speakers plugged into your DV camcorder or deck.
When you’re sending video through FireWire to view on an external monitor, Final Cut Pro is also sending the audio through FireWire.
Plug some headphones or speakers into your DV camcorder or deck and you’ll hear sound.
If you want to just watch your computer screen and listen through your Mac output, set External Video to “Off” under the View Menu.
If you can’t hear any audio during logging- this is good- having audio playthrough while capturing can lead to out-of-sync and other problems. Just plug some headphones or speakers into your DV camcorder or deck and you’ll hear sound.