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MPX Plus 866 A Media Presentation Matrix Switcher • Switcher Software
5-12
PRELIMINARY
Output signal, pre mic mixer, controls (
d
)
The output signal processor chain, pre mic mixer, makes adjustments to program
audio material, after it is tied to a specific output but before it is mixed with
microphone audio.
Post Gain control — The always-present post gain control provides separate left
and right channel (or separate summed mono channel) faders for fine adjustment
of the program material before the mic material is mixed in, with a gain range of
-100 dB to +12 dB in 0.1 dB increments. The default setting is unity gain (0.0 dB).
The Mute button, accessible in the dialog box,
let you silence the mic/line input.
The Gang button, accessible in the dialog box, lets you couple
theleftandrightfaders.Gangedfadersmovetogetherat
relative levels to the top or bottom of their travel. If one fader
reaches the limit of its travel first, it retains that position while the other fader
continues to travel. When the ganged faders travel in the reverse direction, the
fader that was at its limit reverts to its position relative to the other fader.
The Enable Mono Summing checkbox, accessible in the
dialog box, provides the control to insert a stereo-to-
mono summing amplifier if desired. The summing amp creates dual mono audio
paths whose levels can be controlled individually. When a summing amp is
inserted,theappearanceofthePostGaincontrolchangestoMonoSum,
as shown at right.
N
Summing increases the overall level by 6 dB.
N
The summing amplifer function occurs before the Post Gain control; any
adjustments made in the control to summed audio are made to both mono audio
paths.
Loudness block —
The loudness processor block, when
inserted, applies a filter compensation curve to the signal in
an inverse relationship to the the post gain control setting
and output volume control setting; the higher the post-gain or output volume
setting, the less compensation is applied. For the relationship to the Post-gain
control, the left and right trims are represented by separate curves in the
Loudnessdialog.Youcanne-tunetheloudnesscompensation;see“Optimizing
the Audio“, later in this chapter.
Bass and treble block —
The bass/treble processor
block, when first inserted, applies separate bass and
treble filters. If you open the associated Bass/Treble
dialog box, you can then replace these filters. The bass and treble filters (and the
other available filters) and selecting different filters are identical to as described
on the program audio input in the filter processor block (except that only two
filters total can be selected for this block). See “Program audio input signal
controls (
a
)”.
N
Selecting “Bass /Treble Filter” inserts two separate filters.
N
If you select different filters for this block, the name of the block changes
to “Filt”, as shown at right.
, accessible in
the dialog
box,