Stereo Mixer Effect; Tone Effect (Pro Only) - Adobe AFTER EFFECTS 7.0 Manual

ADOBE AFTER EFFECTS 7.0
389
User Guide
See also
"Previewing audio" on page 136

Stereo Mixer effect

The Stereo Mixer effect mixes the left and right channels of an audio layer and pans the entire signal from one
channel to the other.
Adjust the following controls for the Stereo Mixer effect:
Specify the level of the left or right audio channel of an audio layer. A value of 2.00 is full level.
Left Level, Right Level
Shift the mixed stereo signal from one audio channel to the other. Values of –1.00 for Left pan
Left Pan, Right Pan
and +1.00 for Right pan produce an even balance.
Inverts the phase of both channels of the stereo signal. Use this control to prevent two sounds at the
Invert Phase
same frequency from canceling each other out.
See also
"Previewing audio" on page 136

Tone effect (Pro only)

The Tone effect synthesizes simple audio 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 the Tone 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.
Adjust the following controls for the Tone effect:
Specifies the type of waveform to use. Sine waves produce the purest tones. Square waves
Waveform Options
produce the most distorted tones. Triangle waves have elements of both sine waves and square waves but are closer
to sine waves. Saw waves have elements of both sine waves and square waves but are closer to square waves.
Specifies the frequency in Hz of the first through the fifth tones. To turn off a tone, set its frequency
Frequency 1...5
to 0.0.
Changes the amplitude of all tones. If you hear clicking when you preview or play the audio, you may have set
Level
the Level value too high. To produce a clean sound, use a percentage less than or equal to 100 divided by the number
of frequencies you use. For example, if you use all five frequencies, choose 20%.
To avoid clicks at the end of a tone, set a keyframe for the desired amplitude level at the frame just before the end of
the tone, and then set another keyframe for a level of 0.0 at the end of the tone. This technique works well for any
music that you end abruptly.
See also
"Previewing audio" on page 136
"Using keyframes" on page 192