Apple Motion 4 - Manual (Page 1355)

High Frequency: Sets the high frequency threshold of audio analysis. Only audio
frequencies below this value will be analyzed. Values range from 1 Hz to 22,050 Hz.
Floor: Sets the minimum value of audio input, below which results are ignored. Values
range from 0 to 1.
Ceiling: Sets the maximum value of audio input, above which results are ignored. Values
range from 0 to 1.
Smoothness: Sets the window size to smooth the result curve. Any value other than 0
triggers a keyframe reduction with an error tolerance of 1%. Values range from 0 to 10.
This parameter is only available if Respond To is set to Amplitude.
Note: Depending on your audio file, Smoothness values greater than 7 may result in
audio playing out of sync.
Sensitivity: Sets the sensitivity of the transient detection. Values range from 0% to 100%.
This parameter is only available if Respond To is set to Transients.
Channel: Sets the audio channel to analyze. Value can be set to Mix/Mono, Left, or Right.
Note: With a multichannel audio file used as a source, Mix/Mono must be selected in
order for audio analysis to be performed properly.
Peaks: Sets the way the key points are linked when drawing the peak curves generated
by the audio analysis. Value can be set to Sharp, Smooth, Square, or Continuous.
The different peak types are described in the list below.
Note: The examples below are for reference only. Because the audio behavior does not
generate keyframes, you won’t see actual keyframes in the Keyframe Editor.
• Sharp: Each peak of the animation curve is described by three keyframes with a straight
line drawn between them. A selected keyframe has no tangent handles.
• Smooth: Each peak of the animation curve is drawn by a single keyframe with a Bezier
curve. A selected keyframe has a tangent handle to change the shape of the curve.
1355 Chapter 20 Working with Audio