Apple Final Cut Pro 6 - Manual (Page 645)

312 Part II Rough Editing
7 Render the Room Tone sequence, then edit the sequence into the gap in your program,
just as you would a clip.
To replace an unwanted section of an audio clip with room tone:
1 Make the tracks that contain the unwanted audio the audio destination tracks, then
disconnect the video destination track.
2 Play your clip using the J, K, and L keys, and set In and Out points right before and after
the section of audio you want to replace.
3 Move the Canvas or Timeline playhead to the In point.
4 Drag your Room Tone sequence into the Viewer, and move the Viewer playhead to the
start of the section of room tone you want to use.
5 Set an In point in the Viewer.
Edit the Room Tone
sequence into your existing
sequence to fill the gap.
In and Out points are set to
mark the section you want to
replace with room tone.