DTP CrossPoint 84 Series Matrix Switchers • Matrix Software 129
7. Release the bypass of the loudness processor to hear the compensation.
Alternate method:
NOTE: This method works if 90 dB is an acceptable amplifier or volume limit for the
room.
1. Set the Loudness Compensation fader in the loudness dialog box to its default (center)
position and the output channel volume fader to 0 dB (100% volume).
2. Adjust the amplifier until the SPL meter reads 90 dB. Loudness is now calibrated.
Setting loudness “by ear”
When setting loudness by ear, it is also essential that the system gain structure be set up
first.
1. Open the post-matrix loudness processor dialog box.
2. Bypass the loudness processor.
3.
Place the meter in an average listening location.
4.
Set the output volume fader to a r
elatively quiet listening level. Filter compensation
from the loudness processor is most prominent at low listening levels. Set to the levels
described earlier.
5.
Set the Loudness Compensation fader in the loudness dialog box to its default (center)
position.
6.
Release the bypass on the loudness pr
ocessor to hear the compensation.
NOTE: You should hear a moderate enhancement to the program material with
more accentuated bass frequencies (below 500 Hz) and more brightness in the
high frequencies that carry harmonic content (above 7 kHz). You can toggle the
loudness bypass on and off to compare the difference between loudness off and
on.
7. To experiment with less loudness compensation, move the Loudness Compensation
fader to the left, toward Less.
For more loudness compensation, move the fader to the right, toward More.
8. Any adjustment you make to the Loudness Compensation fader carries through to all
listening levels. Set the DSP Configurator output volume to a relatively loud listening
level.
9. Toggle the loudness bypass on and off to compare the difference between loudness off
and on. At a loud listening level, this difference should be minimal, or barely perceivable.
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