Exporting an audio mix, Mixdown options – Apple Shake 4 User Manual
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Chapter 9
Using the Audio Panel
For example, if in peak mode, and the peak audio value over an interval is 0.5
(approximately -6 dBFS), the value entered with logarithmic mode off would be 0.5.
With logarithmic mode on, it would be ( -6 + 90 ) / 90 = 0.9333.
Create separate left/right curves
Either one curve is created, or left and right channels are sampled and two curves are
created.
Lowpass Filter
Activates the LPF, as described below.
You can use the lowpass filter to restrict the frequency range that Shake analyzes to
create the resulting curve data. For example, you can filter out the majority of the high-
frequency content of a song, allowing the bass (such as drums) to become the primary
source of curve data.
Lowpass Filter Freq (Hz)
This control determines the cutoff frequency for the lowpass filter. All frequencies at or
above this frequency are cut off completely when the filter is activated. This setting is
useful for analyzing strictly low-frequency content, such as bass drums, rumble,
earthquakes, and other subwoofer-shaking phenomena. When the filter is active, its
effect may be heard during playback. (Use “Preview Audio” to hear the effect of sliding
the filter freq in real time.) The lowpass filter setting does not affect mixdown files or
QuickTime renders.
Exporting an Audio Mix
If necessary, you can export the audio mix you’ve created within your project as a
separate audio file. If you’ve created an audio mix that must accompany an image
sequence that you’re outputting, the audio mix must be output separately.
Note: Rendering a QuickTime file via a FileOut provides the option to export the audio
and video within a single media file.
Mixdown Options
The following parameters are available in the Mixdown Options subtree:
Update from Globals
Indicates if timing for the audio export should come from script globals or from the
Audio Panel. Clicking update now reads settings from the Globals tab.
Time Range
The number of frames to be exported.
Mixdown File Name
The output file name.