Apple Final Cut Pro HD (4.5): New Features - Manual (Page 36)

36 Preface New Features in Final Cut Pro HD
Keyframe thinning
A new Audio Keyframe Thinning pop-up menu in the General tab of the User
Preferences window allows you to control how detailed keyframe automation is when
recorded using the Audio Mixer or audio filter controls. There are three choices.
• All: Records the maximum number of keyframes possible while you move a track
strip’s fader or panning slider. The end result is a precise re-creation of the levels you
set using the Audio Mixer. The drawback to this option is that you might end up with
an extremely dense cluster of keyframes in the audio level overlays of the affected
clips that can be difficult to edit later.
• Reduced: Reduces the number of recorded keyframes that are created when you
move a track strip’s fader or panning slider. The resulting level or panning overlay in
the Timeline or Viewer is an accurate reproduction of the levels you set, but is easier
to edit using the Selection or Pen tool.
• Peaks Only: Records only the minimum number of keyframes necessary to
approximate the levels you recorded when moving a track strip’s fader or panning
slider. Keyframes recorded using the Peaks Only option reflect only the highest and
lowest levels that were recorded. This is primarily useful when you want to record a
minimum number of keyframes to edit later in the Timeline or Viewer.
Support for multichannel output and Mac OS X–compatible audio interfaces
New support is available for specifying Mac OS X–compatible audio interfaces for
capture and output in the Audio/Video Settings window. New settings in the Audio
Outputs tab of the Sequence Settings window allow you to define the number of audio
output channels that are available to assign to audio tracks from your sequence, using
whichever external audio interface or third-party video capture card is connected to
your computer. By default, a stereo preset is enabled, and will work with the audio
output built in to your computer, as well as with most DV camcorders and third-party
video capture interfaces. If you have a more sophisticated audio interface specified in
the Audio/Video Settings window that supports more than two channels of audio
output, you can create a new preset to define these additional audio output channels.
Export multiple audio outputs to AIFF files
The Export Audio to AIFF(s) command in the File > Export submenu gives you the
opportunity to export every audio output channel that’s defined in the Audio Outputs
tab of your sequence’s settings as a separate AIFF file. You also have the option of
saving each exported AIFF file at 24-bit resolution, which is useful because Final Cut Pro
mixes the audio in your program at 32-bit internal resolution, even if your source audio
is 16 bit. Since all audio calculations are made with higher precision to maximize the
quality of your program’s audio, using this command to export your audio preserves
this quality.
UP01022.Book Page 36 Tuesday, March 23, 2004 7:32 PM