Line Output Channels; Loudness (Loud) - Extron electronics DMP 64 User Manual

Line Output Channels

There are four mono Line Output channels. Controls and processing blocks, identical for
each output channel, are described in the following sections.

Loudness (LOUD)

The loudness processor compensates for changes in human perception to varying volume
levels by applying a filter compensation curve to the signal in an inverse relationship to
the gain control setting—the higher the gain setting, the less compensation is applied.
Generally, as volume is lowered, perception of certain frequencies is progressively
diminished, returning to a more flat response as volume is increased. Loudness will boost
those diminished frequencies to the highest degree at low volume levels, decreasing the
boost as volume increases.
Bypass must be disengaged for the loudness processor to function. The bypass button is
red when engaged (loudness control defeated), gray when disengaged (loudness control
active).
When bypassed, the graph displays the current filter curve as a dotted line. When bypass
is disengaged, the current filter curve is displayed as a solid line.
Figure 34.
The Loudness dialog window contains the following elements:
1.
2.
Loudness Dialog Window
Graph — displays the compensation curve being applied to the signal. These curves
are read-only, and are not adjustable from the graph.
Compensation Adjustment slider — from a center zero-point, the user can slide
to the left for less loudness compensation (filter curve is reduced), or to the right
for more (filter curve is increased). The slider position is translated into a dB value,
displayed in the compensation readout box contained in the Advanced Calibration
section. The slider has a 48 dB (+24 dB) range.
DMP 64 • Operation 45