Lexicon MPX 550 - Manual (Page 79)

Program Descriptions
MPX 550
4-35
2. Peak Expansion Meter
Indicates the level of peaks above the peak
expansion threshold. Low-level peaks are shown as
one or two graduated bars. Slightly higher peaks of
longer duration are shown as three graduated bars.
High-level peaks are shown as three solid bars.
Note:
Use the Meters parameter to select between gain
reduction and input level metering.
3. Gain Reduction Meter
When the Meters parameter is set to GR, indicates
the output level reduction due to compression. The
value shown indicates the maximum left or right
channel gain reduction, whichever is greater.
The meter moves from right to left. The tick marks
are placed in 3dB increments. The right-most tick
mark represents 0dB or no gain reduction. Each tick
mark proceeding from right to left indicates an
additional 3dB of gain reduction.
4. Input Meter
When the Meters parameter is set to In, indicates the
maximum left or right channel input levels,
whichever is greater. The associated tick marks are
placed in 3dB increments. The right-most tick mark
indicates 0dB or maximum input level.
TYPICAL MASTERING DYNAMICS CONTROL
ADJUSTMENT
The following is a common scenario for musical sources
that have not previously been compressed:
• For analog input sources, adjust the front panel
Input Trim knob so the input meters peak in the -6dB
range. The input meters should never exceed the
0dB level.
• Beginning at 0dB, reduce the setting of the ExpThrsh
parameter until peaks in the source material cause
the peak expansion level meter to show 1 to 3
graduated bars. High-level peaks in the sound source
. . . continued on page 4-36