Adobe AUDITION 3 User Manual page 168

ADOBE AUDITION 3.0 163
User Guide
Center Channel Extractor effect
The Stereo Imagery > Center Channel Extractor effect keeps or removes frequencies that are common to both the
left and right channels—in other words, sounds that are panned center. Often voice, bass, and lead instruments are
recorded this way. As a result, you can use this effect to bring up the volume of vocals, bass, or kick drum, or you can
remove any of them to create a karaoke mix.
See also
"Applying effects in Edit View" on page 106
"Applying effects in Multitrack View" on page 107
"Use effect presets" on page 104
"Add preroll and postroll to effects previews" on page 107
Center Channel Extractor options
Specifies the phase degree, pan percentage, and delay time for the audio you want to extract or
Extract Audio From
remove. Set this option to Center (0˚) to work with audio that is panned to the exact center. To extract surround
audio from a matrix mix, set this option to Surround (180˚) to work with audio that is exactly out of phase between
the left and right channels. Set this option to Custom to modify Phase Degree, Pan, and Delay. The former two
settings can range from -100% (hard left) to 100% (hard right). The latter setting ranges from -5 to +5 milliseconds.
Sets the range you want to extract or remove. Predefined ranges include Male Voice, Female Voice,
Frequency Range
Bass, and Full Spectrum. Set this option to Custom to define a frequency range.
Specifies how much of the selected signal you want to extract or remove. Move the slider to
Center Channel Level
the left (negative values) to remove center channel frequencies and to the right (positive values) to remove panned
stereo material.
Boosts center channel material if the Center Channel Level slider is set to a positive value and
Volume Boost Mode
boosts panned stereo material if the slider is set to a negative values. This option is especially useful for boosting
vocals.
Controls how much bleed through to allow. Move the slider to the left to increase audio bleed through
Crossover
and make it sound less artificial. Move the slider to the right to further separate center channel material from the mix.
In general, higher numbers work better for extracting the center channel, whereas lower
Phase Discrimination
values work better for removing the center channel. Lower values allow more bleed through and may not effectively
separate vocals from a mix, but they may be more effective at capturing all the center material. In general, a range
from 2 to 7 works well.
Sums the left and right channels, and creates a
Amplitude Discrimination and Amplitude Bandwidth
180˚-out-of-phase third channel that Audition uses to remove similar frequencies. If the volume at each frequency
is similar, audio in common between both channels is also considered. Lower values for Amplitude Discrimination
and Amplitude Bandwidth cut more material from the mix, but may also cut out vocals. Higher values make the
extraction depend more on the phase of the material and the less on the channel amplitude. Amplitude Discrimi-
nation settings between 0.5 and 10 and Amplitude Bandwidth settings between 1 and 20 work well.
Keep at 0% for faster processing and to take advantage of multiple CPU and hyperthreaded
Spectral Decay Rate
computers. Set the value between 80% and 98% to help smooth out background distortions.
Specifies the Fast Fourier Transform size, affecting processing speed and quality. In general, settings
FFT Size
between 4096 and 10,240 work best. Higher values (such as the default value of 8192) provide cleaner sounding
filters.