C O N T R O L P A N E L
page 3 – 16
D-9 / Oct 2003
Low-Pass Filter
This is a 24dB/octave variable low-pass filter with Butterworth char-
acteristics, tunable between 1KHz and 20.2KHz. This filter is used to
remove unwanted high frequency artifacts (noise, squeaks, etc.) with
minimal effect on the required program.
Equalizer
This consists of four bands of parametric control used for modifying
the sonic qualities of a signal. Each band has +/-14dB of BOOST/CUT
capabilities (+/- knob), sweepable center frequency over the range of
16.1Hz to 20.2kHz, and with a filter “Q” or sharpness [BW (Band Width)
knob] sweepable between 0.3 and 5.0 octaves. The LOW and HIGH bands
also have a shelving function. The composite effect of any EQ adjust-
ments, as well as text describing the equalizer settings, are shown on the
LCD screen.
Phase
A pair of switches, one for left and one for right, are provided to cause
the reversal of absolute phase of the signal path.
Function Lock
It is a necessity under some circumstances that non-technical personnel
be prevented from adjusting a control surface’s signal processing; even
with qualified personnel at the helm, locking out the controls can prevent
an inadvertent mid-show disaster.
This is achieved by the FUNCTION LOCK switch on the upper right
corner of the EFS panel. The control surface operator can lock out
functions that may be undesirable to accidentally activate. To lock out a
function, first press the FUNCTION LOCK button. This causes the
EQ OUT
EQ IN
Settings
Composite
Curve
D-9 / Aug 2004
D-9 / Jan 2006
Summary of Contents for D-9
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