Operation Manual

ADOBE AUDITION 3.0
User Guide
135
If this option is selected, the entire selected range is equalized at the settings shown.
If this option is deselected, you can specify separate initial and final equalization settings, so that the selection can
smoothly glide from the initial equalization setting to the final setting over the selected range. Click the Initial
Settings and Final Settings tabs to specify initial and final settings.
Initial Settings tab Appears if Lock To These Settings Only is deselected. Click this tab to specify the initial EQ
settings.
Final Settings tab Appears if Lock To These Settings Only is deselected. Click this tab to specify the final EQ
settings.
Equalizer band sliders Increase or decrease the frequency specified beneath each slider. Amplitude appears above
each slider.
Master Gain sliders Adjust the equalizer’s overall level for both the left and right channels of stereo waveforms.
If you increase the EQ frequencies of a waveform, the waveform’s volume usually increases too, potentially leading
to clipping. Use the Master Gain sliders to reduce the level before applying the effect.
Lock L/R Lets you adjust channels together or separately. Select this option to adjust the channels together,
maintaining the same settings for each. Leave this option unselected to adjust each channel separately.
To produce a low-pass filter, set the higher frequency scroll bars to -30. Similarly, you can create a high-pass filter by
reducing the lower frequencies.
Scientific Filters effect (Edit View only)
The Filter And EQ > Scientific Filters effect provides high-order IIR (Infinite Impulse Response) filters for precise
band-pass, notch, or high- or low-pass filtering. The most common types of high-order filters are available: Bessel,
Butterworth, Chebychev 1, and Chebychev 2. Each type has different characteristics for filter attenuation and the
steepness of transition bands at cutoff points. Butterworth usually provides the best compromise between quality and
precision.
On the Scientific Filters graph, one line shows frequency response (measured in decibels), and the other line shows
either phase (measured in degrees) or group delay (measured in milliseconds), depending on whether the Phase or
Delay option is selected. Increase the graph’s display range by selecting Extended Range.
Scientific Filters graph for Butterworth filter (Remove Subsonic Rumble preset)
A. Group Delay (milliseconds) B. Frequency Response (dB)
A
B