Bass Boost - Lexicon MX300 User Manual

Effects Descriptions
MX300
Diffusion
Controls the initial echo density. High settings of Diffusion result in high initial
echo density, and low settings cause low initial density. In a real-world situation,
irregular walls cause high diffusion, while large flat walls cause low diffusion.
For drums and percussion, try using higher Diffusion settings.
Shape & Spread
In the Hall reverbs, Shape and Spread work together to control the overall
ambience of the reverberation. Shape determines the contour of the
reverberation envelope. With Shape all the way down, reverberation builds
explosively, and decays quickly. As Shape is advanced, reverberation builds up
more slowly and sustains for the time set by Spread. With Shape in the middle,
the build-up and sustain of the reverberation envelope emulates a large concert
hall (assuming that Spread is at least halfway up, and that Size is 30 meters
or larger). Low Spread settings result in a rapid onset of reverberation at the
beginning of the envelope, with little or no sustain. Higher settings spread out
both the buildup and sustain.
Size
Size sets the build-up rate of diffusion after the initial period (which is con-
trolled by Diffusion). The Size control changes reverb sound from very large to
very small. Generally, set this control to the approximate size of the acoustic
space being created, before adjusting anything else. The size in meters is
roughly equal to the longest dimension of the space. Audio is temporarily muted
when Size is changed.
RT High Cut
Rt HC sets the frequency above which a 6dB/octave low-pass filter attenuates the
reverberated signal. It does not attenuate the reflections. High frequencies are
often rolled off with this parameter, resulting in more natural-sounding rever-
beration. Setting a low frequency for this parameter can actually shorten the
reverb time, as it damps the audio as it recirculates.
Liveliness
Adjusts the amount of high frequency content in the reverberation tails. Higher
settings increase high frequency response, creating brighter reverbs; lower set-
tings create darker reverbs with more bass frequency emphasis.

Bass Boost

Bass Boost boosts or cuts frequencies below Crossover. The amount of boost or
cut required is highly dependent on the material being processed.
Bass Boost Frequency
Sets the frequency at which the transition from Mid Rt to Low Rt takes place.
This control should be set at least two octaves higher than the low frequency you
want to boost. For example, to boost a signal at 100Hz, set Bass Boost Frequency
to 400Hz. (This setting works well for classical music.) Crossover works best
around 400Hz for boosting low frequencies, and around 1.5 kHz for cutting low
frequencies.
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