Adobe AUDITION 3 User Manual page 137

If you equalize extremely low frequencies, set Accuracy to between 500 and 5000 points.
Compensates for an overall volume level that is too soft or too loud after the EQ settings are adjusted.
Master Gain
The default value of 0 dB represents no master gain adjustment.
Notch Filter effect
The Filter And EQ > Notch Filter effect removes up to six user-defined frequency bands, in addition to standard
telephone DTMF tones. Use this effect to remove very narrow frequency bands, such as a 60 Hz hum, while leaving
all surrounding frequencies untouched.
To remove excessive sibilance (shrill "ess" sounds), use the De-Essing preset.
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
Notch Filter options
Determines if notches have equal or individual attenuation levels.
Fix Attenuations To
Specifies the center frequency for each notch.
Frequency
Specifies the amplitude reduction for each notch.
Attenuation
DTMF Lower Tones, DTMF Upper Tones
are useful if you prepare audio for radio.
Determines frequency range for all notches. The three options range from Narrow for a second order
Notch Width
filter, which removes some adjacent frequencies, to Super Narrow for a sixth order filter, which is very specific.
Use no more than 30 dB attenuations for a Narrow setting, no more than 60 dB for Very Narrow, and no more than
90 dB for Super Narrow. Greater attenuation can remove a wide range of neighboring frequencies.
Virtually eliminates noise and artifacts, but requires significant processing. This option is audible only
Ultra-Quiet
on state-of-the-art, professional monitoring systems.
Parametric Equalizer effect
The Filter And EQ > Parametric Equalizer effect provides maximum control over tonal equalization. Unlike the
Graphic Equalizer, which provides a fixed number of frequencies and Q bandwidths, the Parametric Equalizer gives
you total control over frequency, Q, and gain settings. For example, you can simultaneously reduce a small range of
frequencies centered around 1000 Hz, boost a broad low-frequency shelf centered around 80 Hz, and insert a 60 Hz
notch filter.
The Parametric Equalizer uses second-order IIR filters, which are very fast and provide very precise resolution, even
at lower frequencies. For example, you can precisely boost a range of 40 to 45 Hz.
Filters the standard lower and upper DTMF telephone tones. These options
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User Guide