Audio Behaviors

Audio behaviors can be applied either to audio tracks from movie clips with sound or standalone audio tracks. There are several ways to apply an audio behavior:

For more information about applying behaviors, see Applying and Removing Behaviors.

There are two useful behaviors to control audio tracks in Motion:

Audio Auto Pan

Automates commonly used panning effects in an audio track.

Parameters in the Inspector
  • Pan Position: Sets the position of the pan. If the Pan Position slider is set to 0, the sound is equally balanced between the left and right channels. With larger negative values of Pan Position, the sound increases in volume in the left channel and decreases in the right channel. With larger positive values of Pan Position, the sound increases in volume in the right channel and decreases in the left channel.
  • Depth: Sets how far the automatic pan occurs in the left and right channels. Values range from 0 to 100.
  • Gain: Sets the target gain used for volume. Values range from –96 dB to +6 dB.
  • Loops: Sets the number of times the auto pan effect repeats. Values range from 1 to 30.
  • Start Offset: Sets the number of frames from the beginning of the audio after which the audio effect starts.
  • End Offset: Sets the number of frames from the end of the audio before which the audio effect stops.
HUD Controls

The HUD contains the same controls as the Inspector, with the exception of the Start Offset and End Offset controls.

Audio Fade In/Fade Out

Automates fading in and out an audio track.

Parameters in the Inspector
  • Fade In Time: Sets the number of frames over which the audio fades in from –96 dB to 0 dB from the first frame of the audio track. A duration of 0 frames leaves the beginning of the audio track unmodified.
  • Fade Out Time: Sets the number of frames over which the audio fades out from 0 dB to –96 dB. A duration of 0 frames leaves the end of the audio track unmodified.
  • Start Offset: Sets the number of frames from the beginning of the audio track after which the volume animation starts. Adjust this parameter to make the behavior start after the beginning of the audio track.
  • End Offset: Sets the number of frames from the end of the audio before which the animation stops. Adjust this parameter to make the behavior end before the end of the audio track.
HUD Controls

The Audio Fade In/Fade Out behavior has a custom control, shown below.

Figure. HUD showing Audio Fade In/Fade Out behavior controls.

Note: The Audio Fade In/Fade Out HUD control is identical to the Fade In/Fade Out Basic Motion behavior.