X

Chapter 5 Equalizers 110
Linear Phase EQ Analyzer
The Analyzer uses 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 simplies the task of setting
EQ curves to raise or lower the levels of frequencies or frequency ranges.
The bands derived from FFT analysis are scaled logarithmically—there are more bands in higher
octaves than in lower octaves.
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 −40 dB. The
Analyzer display is always dB-linear.
Note: High Analyzer resolutions require signicantly 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 turn o the Analyzer or close the Channel EQ window after setting
EQ parameters.
Match EQ
Match EQ overview
Match EQ allows you to analyze and store the average frequency spectrum of an audio le as a
template. You can apply this template to another audio signal so that it matches the spectrum
of the original le. This is also known as a ngerprint EQ, where one sonic ngerprint is applied to
another signal.
Match EQ enables you to acoustically match the tonal quality or overall sound of dierent songs
you plan to include on an album, for example, or to impart the color of any source recording to
your own projects.
Match EQ is a learning equalizer that analyzes the frequency spectrum of an audio signal such as
an audio le, a channel strip input signal, or a template. The average frequency spectrum of the
source le (the template) and of the current material (this can be the entire project or individual
channel strips within it) is analyzed. These two spectra are then matched, creating a lter curve.
This lter curve adapts the frequency response of the current material to match that of the
template. Before applying the lter curve, you can modify it by boosting or cutting any number
of frequencies or by inverting the curve.
The Analyzer allows you to visually compare the frequency spectrum of the source le and
the resulting curve, making it easier to make manual corrections at specic points within
the spectrum.
Note: Although Match EQ acoustically matches the frequency curve of two audio signals, it does
not match any dynamic dierences between the two signals.