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MPX Plus 866 A Media Presentation Matrix Switcher • Switcher Software
5-38
PRELIMINARY
Finalizing the output gain structure
Adding a compressor generally reduces the signal level, while a filter may boost or
cut the overall signal level. Loudness boosts the overall signal level, but mostly at
lower volume settings (see “Calibrating loudness” for more information).
1
. Add any processors that you wish to use into the output signal chain.
After adding processors to the output signal chain, the output volume level
may clip when set to or near 100%.
2
. Set output volume to a level where clipping is eliminated.
T
Remember that the output volume control is essentially the same volume control that
is accessible to a front panel or Matrix Switchers Control Program operator. These
operators may unknowingly change the volume back to a level where clipping occurs.
You reduce the chance of this inadvertent clipping by using the post-matrix trim
control rather than the volume control (see “Adjusting the post-matrix trim”).
N
Mic levels also contribute to possible clipping at the outputs. They may need
to be lowered at the mic mix-points to maintain the balance between program
material (line inputs) and voice (mic).
Setting the mic input and mic mix-point levels
1. Double-click the mic mix-point to be set, opening the dialog box for that
mix-point.
2
. Unmute the mix-point (mixing in the mic signal). The default level is 0.0 dB,
or unity gain.
3
. Connect your chosen microphone to mixed mic/line input.
4. Open the mic input gain dialog box for the mixed mic.
5. If your mic requires phantom power, turn it on in the mic input dialog box.
6. Unmute the mic/line input.
7. While testing the mic, raise the mic gain fader until the mic is clearly audible.
The gain level and the mic gain meter level reading vary at this point, but as a
general guideline, the input gain level is approximately 40 dB to 50 dB and the
meter averages approximately -20 dBFS.
T
Youwanttooptimizeaudiohere,butvoicelevelsatmicrophoneinputscanvary
greatly. Having the meters average around -20 dBFS gives enough headroom to
accommodate sudden changes to voice levels. Further adjustment may be necessary.