Extron electronic MPX Plus 866 A manual Output signal, pre mic mixer, controls D

PRELIMINARY

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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 the left and right faders. Ganged faders move together at 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, the appearance of the Post Gain control changes to Mono Sum,

as shown at right.

NSumming increases the overall level by 6 dB.

NThe 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 Loudness dialog. You can fine-tune the loudness compensation; 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)”.

NSelecting “Bass /Treble Filter” inserts two separate filters.

NIf you select different filters for this block, the name of the block changes to “Filt”, as shown at right.

5-12 MPX Plus 866 A Media Presentation Matrix Switcher • Switcher Software