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

ADOBE AFTER EFFECTS 7.0
User Guide
389
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:
Left Level, Right Level Specify the level of the left or right audio channel of an audio layer. A value of 2.00 is full level.
Left Pan, Right Pan Shift the mixed stereo signal from one audio channel to the other. Values of –1.00 for Left pan
and +1.00 for Right pan produce an even balance.
Invert Phase Inverts the phase of both channels of the stereo signal. Use this control to prevent two sounds at the
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.
YoucanalsoapplytheToneeffecttoalayerthathasnoaudio,suchasanAdobeIllustratorobject,tosynthesizeaudio.
When you render the movie, make sure that you select an output format that supports audio.
Adjust the following controls for the Tone effect:
Waveform Options Specifies the type of waveform to use. Sine waves produce the purest tones. Square waves
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.
Frequency 1...5 Specifies the frequency in Hz of the first through the fifth tones. To turn off a tone, set its frequency
to 0.0.
Level Changes the amplitude of all tones. If you hear clicking when you preview or play the audio, you may have set
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