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Using the Channel EQ Analyzer
The Analyzer, when active, makes uses of a mathematical process called a Fast Fourier
Transform (FFT) to provide a real-time curve of all frequency components in the incoming
signal. This is superimposed over any EQ curves you have set. The Analyzer curve uses
the same scale as the EQ curves, making it easy to recognize important frequencies in
the incoming audio. This also simplifies the task of setting EQ curves to raise or lower the
levels of frequencies/frequency ranges.
The bands derived from FFT analysis are divided in a logarithmic scale—there are more
bands in higher octaves than in lower ones.
As soon as the Analyzer is activated, you can change the scaling with the Analyzer Top
parameter, on the right side of the graphic display. The visible area represents a dynamic
range of 60 dB. Drag vertically to set the maximum value to anywhere between +20 dB
and −80 dB. The Analyzer display is always dB-linear.
Note: When choosing a resolution, be aware that higher resolutions require significantly
more processing power. High resolution is necessary when trying to obtain accurate
analysis of very low bass frequencies, for example. It is recommended that you disable
the Analyzer or close the Channel EQ window after setting the appropriate EQ parameters.
This will free up CPU resources for other tasks.
DJ EQ
The DJ EQ combines high and low shelving filters, each with a fixed frequency, and one
parametric EQ. You can adjust the Frequency, Gain, and Q-Factor of the latter. The DJ EQ
allows the filter gain to be reduced by as much as −30 dB.
• High Shelf slider and field: Sets the amount of gain for the high shelving filter.
• Frequency slider and field: Sets the center frequency of the parametric EQ.
• Q-Factor slider and field: Sets the range (bandwidth) of the parametric EQ.
• Gain slider and field: Sets the amount of gain for the parametric EQ.
91Chapter 5 Equalizers