Apple Final Cut Express HD - Manual (Page 505)

Chapter 34 Trimming Clips Using the Trim Edit Window 505
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Listening to Audio While Trimming
When you play back the outgoing or incoming clip in the Trim Edit window (using the
J, K, and L keys), you can choose which audio tracks you hear.
The following options are available in the Editing tab of the User Preferences window:
 Trim with Sequence Audio: With this option selected, you hear the entire audio mix
when you play back the clip on either side of the Trim Edit window. This helps you
set a new In or Out point based on audio cues in tracks where edit points aren’t
selected. This option is selected by default.
 Trim with Edit Selection Audio (Mute Others): Any audio tracks with selected edits are
played back. All others are muted.
If both options are deselected, you will hear any tracks with selected edits, but clip item
linking is also taken into account. For example, if you select an edit point on V1, and the
clip item is linked to audio clip items on A1 and A2, you hear tracks A1 and A2. However,
if clip items on A1 and A2 are not linked to a clip item on V1, you won’t hear them.
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Tip: In most situations, you will want to keep the Trim with Sequence Audio checkbox
selected. If you want to hear only specific audio tracks while trimming, select Trim with
Edit Selection Audio (Mute Others).
When you use the J, K, and L keys to play the outgoing or incoming clip, you may want
to hear all of the audio tracks in your sequence, such as music, sound effects, and
voiceover. This can be useful if you are listening for a particular audio cue to determine
when to make a cut.