Parameters Used In The 960L Algorithms - Lexicon 960L Owner's Manual

960L

PARAMETERS USED IN THE 960L ALGORITHMS

Parameter Description
AmbPreD Ambience PreDelay (Ambience only) controls the time of a predelay that precedes the early reflec-
tion (ambience) component of Stereo Ambience. In the same algorithm, RvbDly controls the pre-
delay that precedes the reverberation component.
AmbSize Ambience Size scales all the delay elements of the early reflection and early energy components
of Ambience and Ambient Chamber algorithms. To keep the early reflection energy within the
15ms-50ms window, this control should be set no higher than about 6 or 7.
Amb Lvl Ambience Level sets the overall level of the early reflection and early energy components of
Ambience and Ambient Chamber algorithms.
BassMult Bass Multiply controls the low frequency reverberation time relative to MidRT. If, for example, Bass
Multiply is set to 2X and MidRT is set to 2 seconds, the effective low frequency RT is 4 seconds. For
natural sounding results, use settings of 1.5X or less. Note that values less than 1.0X produce a low
frequency RT that is shorter than MidRT.
BassXOV Bass Crossover sets the frequency at which the transition between MidRT and Bass Multiply takes
place. Except for special effects, there is seldom a need for this parameter to exceed 500 Hz.
Contour Contour controls the profile of the energy decay in the reverberation tail. At a value of zero, this
decay will be smooth and featureless. Large positive and negative values will add noticeable
bumpiness of the decay. Use non-zero values with great caution.
CtrRvb Center Reverb Level controls the reverberation level of the Center output in surround algorithms. This
allows the Center Reverb Level to be set relative to both early reflection levels and the Front and
Rear Reverb Levels. We recommend that the Center Reverb Level be set about 4.5dB lower than
the Front Reverb Level and the Rear Reverb Level. RvbLvl is a master control for CtrRvb, FrRvb and
RearRvb.
Definition Definition is found only in the Chamber and Reverse algorithms. It models the irregularity of reflect-
ing surfaces in the space.
In Chamber, turning Definition up makes reflections more discrete, making the reflecting surfaces
seem less diffuse. Except for special effects, it is recommended that this be set to zero.
In Reverse, Definition controls density buildup; lower values produce more density.
Diffus Diffusion models the effect of irregular wall surfaces in a room by changing echo density. Very low
values produce sharp, discrete early reflections. Higher values produce groups of reflections that
are smoother but less articulated. Except for special effects, it is recommended that this control be
set to a high value.
Early or Reflection Delays. In many real spaces, distinct reflections and echoes are an important
dL>L, dLS>RF,
dR>R, dLS>RS, part of the sound, so many of the 960L's reverbs have reflection delay and echo paths with appro-
dL>R, dRF>LF,
priate controls.
dR>L, dRF>LS,
dLF>LF, dRF>RF,
The Early or Reflection Delays set the delay time. For example, dLF>RS is the delay time in a path
dLF>LS, dRF>RS,
from the Left Front Input, through the diffusor, through a delay of dLF>RS duration, and finally to the
dLF>RF, dRS>LF,
Right Surround Output.
dLF>RS, dRS>LS,
dLS>LF, dRS>RF,
Each of these delay paths has its own level control. The level of the example delay path is set by
dLS>LS, dRS>RS
the related control LvLF>RS.
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