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Adobe After Effects Help
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Parametric EQ (PB only)
This effect either emphasizes or attenuates specific frequency ranges. It is useful for
enhancing music—for example, boosting low frequencies to bring up bass. Use this effect
to enhance up to three different bands of the audio footage. As you specify controls, a
Frequency Response graph indicates the combined equalization curve you create. On the
Frequency Response graph, Band 1 is red, Band 2 is green, and Band 3 is blue. You may find
it easier to specify controls if you determine in advance the frequency-response curve you
want.
For more information, see the After Effects product section on Adobe's Web site.
Reverb (PB only)
This effect simulates a spacious or acoustically live interior by simulating random reflec-
tions of a sound off of a surface. Using the Reverb Time option, specify the average time in
milliseconds between the original audio and the reverberated audio. Use Diffusion to
specify how much the effect scatters the original audio. More diffusion can make the
audio sound further from the microphone. Set Decay to specify the amount of time it
takes for the effect to subside. A longer decay simulates a larger space.
For more information, see the After Effects product section on Adobe's Web site.
Stereo Mixer
Use this effect to mix the left and right channels of an audio layer and pan the entire signal
from one channel to the other. Use the Invert Phase option to invert the phase of one
channel of the stereo signal and prevent two sounds at the same frequency from
cancelling each other out.
For more information, see the After Effects product section on Adobe's Web site.
Tone (PB only)
This effect synthesizes simple tones to create effects such as the low rumble of a
submarine, a telephone ringing in the background, sirens, or a laser blast. You can add up
to five tones for each effect to create a chord, for example, in a composition. When you
apply this effect to audio footage, the dry (unprocessed) audio is ignored, and only the
tone plays.
You can also apply this effect to a layer that has no audio, such as an Adobe Illustrator
object, to synthesize audio. When you render the movie, make sure that you select an
output format that supports audio—for example, QuickTime or Video for Windows.
For more information, see the After Effects product section on Adobe's Web site.
Blur and sharpen effects
Use these effects to soften or sharpen an image.
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Applying Effects
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