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Bass & treble effect, Delay effect, Flange & chorus effect – Adobe After Effects CS3 User Manual

Page 377

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AFTER EFFECTS CS3

User Guide

372

See also

“Preview video and audio” on page 120

Bass & Treble effect

The Bass & Treble effect boosts (increases) or cuts (decreases) the low frequencies (bass) or the high frequencies
(treble) of the audio. For greater control, use the Parametric EQ effect.

See also

“Preview video and audio” on page 120

Delay effect

The Delay effect repeats audio after a specified amount of time. This effect simulates sound bouncing off a surface,
such as a wall.

To simulate the acoustic ambience of a room, use the Reverb effect.

Delay Time

Time between the original sound and its echo, in milliseconds.

Delay Amount

Volume of the first delayed audio, as a fraction of the original.

Feedback

Amount of the echo that is fed back into the delay line to create subsequent echoes.

Dry Out, Wet Out

The amounts of the original (dry) sound and delayed (wet) sound in the final output. Values of

50% are commonly used.

See also

“Preview video and audio” on page 120

Flange & Chorus effect

Flange is an audio effect caused by mixing the original audio with a copy that is delayed by a varying amount that
cycles over time. The frequency of the copy is also offset by an amount related to the delay. Chorus uses a larger delay,
to make one voice or instrument sound like many.

The default settings for the Flange & Chorus effect are for flange. To create a chorus result, use values something like
the following: 40 for Voice Separation Time (or higher for a greater chorus result), 4 for Voices, 0.1 for Modulation
Rate, 50% for Modulation Depth, and 90 for Voice Phase Change, with Stereo Voices selected.

Voice Separation Time

The time in milliseconds that separates each voice. Each voice is a delayed version of the

original sound. Use values of 6 or lower for flange, and higher values for chorus.

Voices

The number of voices in the processed (wet) audio.

Modulation Rate

The rate in Hz at which the modulation cycles.

Modulation Depth

The amount of modulation.

Voice Phase Change

The modulation phase difference in degrees between each subsequent voice. Divide 360 by the

number of voices to find the optimum value.

Invert Phase

Inverts the phase of the processed (wet) audio, emphasizing more of the high frequencies; not inverting

the phase emphasizes more of the low frequencies.