Wheatstone Corporation DMX-16, Руководство пользователя

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To recall a previously-saved EQ Config file, select which channel you
want to apply the settings to using the lower EQ row channel select drop-
down list then click the Push EQ/Dyn settings to button. A file find dialog
box opens so a saved EQ Config file can be selected to apply to that
channel.
Note: The EQ and Dynamics settings assigned to faders 1 and 2
from the factory are saved in the EQ file: PRE_mic.dmx_eq.
EQ & Dynamics Screens
When any of the EQ controls are active, the next to last EQ & Dynamics
channel display (channel 7 or 15) has an audio frequency graph (Figure 4-
10, left and middle illustrations) which shows the current settings of the
various EQ controls. The EQ graphic shows frequency response from 20 Hz
(left side) to 20 kHz (right side). The center of the display is roughly 600
Hz since it uses a logarithmic scale. The middle horizontal line represents 0
dB of gain and each white horizontal line above or below it represents
about 5 dB of level.
Even though the EQ & Dynamics settings are made on a channel-basis,
rather than applied to a particular source, because these settings are
saved as part of the four console Events (along with the channel source
and other channel and monitor settings) with careful planning one can
apply different EQ & Dynamics, Mode, and Panning to specific audio
sources by using Events.
Note: Taking an Event overrides whatever EQ & Dynamics
settings—and mode and pan setting is currently assigned on each
channel.
Figure 4-10 EQ Out, EQ In, and Dynamics Graphic Screens
The four sets of parametric EQ controls are also color-coded. The filter
settings for the HPF and Low EQ settings are in red; the Low-Mid EQ is
shown in orange; the High-Mid EQ setting is shown in green; and the LPF
and High EQ settings are shown in blue.
When the EQ is not active (set Out) lines are shown across the display,
as shown in the left screen in Figure 4-10). When the EQ is active (set In)
then the audio pass band is represented in gray (the middle screen in
Figure 4-10).
When the Compression or Expansion control screens are active the
Dynamics display is shown (right screen in Figure 4-10). It’s a very
different type of display since it graphically shows the ratio between the
incoming audio and the dynamically processed output audio. When
Dynamics is set Out the response line is gray. When Dynamics is set In the
line is orange. The top half of the display reflects the Compressor’s
settings while the bottom half reflects the Expander’s settings.
High Pass & Low Pass Filters
The High Pass Filter (HPF) and Low Pass Filter (LPF) can be used
independently on any channel (each can be set In or Out) to narrow the
audio frequency range of that channel’s audio to less than 20 Hz – 20 kHz.
The frequency pass band is shown graphically as the controls are
adjusted: a red line represents the HPF or low frequency cutoff while a
blue line represents the LPF or high frequency cutoff.
Adjusting the channel encoder on the channel with the HPF display
(Figure 4-11) adjusts the frequency where the lower sounds begin to be
rolled off or attenuated. The control range is 16 Hz to 500 Hz. Audio below
the selected frequency is rolled off at 24 dB per octave. Audio above the
selected frequency is not affected. The HPF is commonly used to remove
low frequency rumble and sounds emitted by air conditioners, AC line
hum, nearby traffic, footsteps, cabinet noises being picked up by the mic
arms, etc.
Figure 4-11 High and Low Pass Filter Screens
Adjusting the channel encoder on the channel with the LPF display
adjusts where the higher frequency or brighter sounds are attenuated. The
control range is 20 kHz down to 1 kHz. This control can selectively remove
higher frequency sounds like hiss from an air conditioner, chair squeaks,
and other high frequency noises without affecting the voice sound—unless
the control is adjusted below about 5 kHz. Audio above the selected
frequency is rolled off at 24 dB per octave while audio below that
frequency is not affected.
The HPF and LPF can also be used together to create the classic phone
filter effect on a voice. To do this, adjust the HPF to about 300 Hz and the
LPF to about 3 kHz. If this setting is saved as an EQ file, it can be loaded
into any channel using the DMX Surface Setup app’s EQ controls.
Four-Band Parametric Equalization
The four parametric EQs (EQ Lo, EQ Lo Mid, EQ Hi Mid, and EQ Hi) are
all identical in operation and, in fact, have the same set of parameters and
control ranges.