PreSonus StudioLive 16.0.2 - Manual (Page 53)

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StudioLive™ 16.0.2 Owner’s Manual
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that, when subtracted from the user’s curve, will produce the flattest possible
response: 0 dB. The resulting response is then used to find coefficients for the
second shelving filter through the same optimization process. Coefficients
for all available shelving filters are found through a recursive process.
Unlike conventional designs, the frequency and bandwidth of the “bands”
depends on the curve entered by the user. This allows for much tighter matching
of that curve. Because of this innovative design, the accuracy of the StudioLive
EQ might feel “wrong” at first. The curve fitting process is capable of very steep
transitions and, unlike conventional analog graphic EQs, what you see is what
you get. With a carefully drawn, smooth curve the StudioLive EQ will have almost
no frequency ripple. The StudioLive EQ is also capable of very sharp notches.
To widen a notch or a bump on a particular band, just bring the adjacent
bands closer to that band‘s gain, and the bandwidth will change accordingly.
Making drastic adjustments too quickly may create an audio artifact as the
new curve is redrawn and crosses over an audio peak. If you are hearing audio
artifacts while setting up the graphic EQ, try creating a smoother curve.
5.3.1 The Graphic EQ Menu and Controls
To turn on and make changes to the graphic EQ, press the GEQ Encoder Mode
button.
The GEQ menu will open in the LCD. When the GEQ page is active, the
meters and encoders of the Fat Channel become the controls for the
graphic EQ.
As you touch a knob, you will notice that its band number, frequency, and gain
are displayed in the GEQ menu. The 31 bands range from 20 Hz to 20 kHz. The
frequency for each band is fixed. When the GEQ is first launched, bands 11
through 22 are controlled by encoders 1 through 15/16, respectively. When
Band 10 is selected in the Show Band field in the GEQ menu, the meters will flip,
and encoders 1 through 15/16 will control Bands 1 through 12, respectively.
When Band 23 is selected in the Show Band field in the GEQ menu, the meters
will also flip, and encoders 1 through 15/16 will control bands 23 through 31.
To exit the GEQ, press any of the other Encoder Mode or Master
Control buttons. Each Master Control button will open its respective
menu, and each Encode Mode button will launch the FX menu.
Power User Tip: Select the Show Band field in the GEQ menu and use the Value knob to
scroll through all the bands on the graphic EQ to get a quick overview of the entire curve.
You will notice that all meters have one LED illuminated to display the current
gain position for each band, and the meter for the selected band in the Show
Band field is inverted so that all LEDs are illuminated except for the LED that
displays the current gain position for that band. The band does not have to
be selected in the Show Band field for its encoder to be active. All encoders
are active, so you can make changes to 12 of the 31 bands at one time.