Lexicon MPX 550 - Manual (Page 76)

Program Descriptions
Lexicon
4-32
DYNAMICS
Note:
A few seconds after the Dynamics preset is loaded,
the Dynamics name will flash briefly on the front
panel display. This does not affect audio input or
output.
Dynamics is intended for use in the studio, when
dynamic processing of stereo signals is required. Because
of its long delay, this preset is not recommended for use
in a live performance or as a mix insert. It includes effects
that perform peak expansion, compression, and tape
saturation in that order.
Dynamics includes nine parameters that are divided into
three Edit Pages. Peak expansion settings are controlled
on the first page, compression settings are controlled on
the second page, and tape saturation settings are
controlled on the third page. The first page also features
a switch that selects between gain reduction and input
metering.
PEAK EXPANSION
Peak expansion is used to raise the overall level of sound
sources that rise above the adjustable peak expansion
threshold. In performances with a wide dynamic range,
peak expansion can increase the level of low-level sound
sources. For example, for a relatively quiet instrument
that swells in volume without the desired impact, peak
expansion can raise the instrument level during the swell.
ExpThrsh (-31 to 0dB)
Controls the threshold above which expansion is
applied. Lower settings enable low-level sound sources
to expand. Higher settings enable only very high-level
peaks to expand.
ExpLvl (0.0dB to 5.89dB)
Controls the amount of expansion that is applied to
sound sources that rise above the expansion threshold.
The parameter setting defines the maximum increase in
signal level due to expansion. Higher settings increase
the level of expansion applied. Maximum expansion is
applied to signals that rise well above the expansion
threshold for longer than 50ms.