3-32
Algorithms and Parameters
Lexicon
RVB TIME (continued)
Low Slope and Mid Slope
These parameters are only available in the Inverse algorithm. Low
Slope determines the shape of the reverb envelope for low
frequencies. When set to 0, the level of low reverb remains
unchanged over its Duration, then cuts off abruptly (depending on
the amount of diffusion in use). Setting Low Slope above 0 causes
the level of low-frequency reverb to rise smoothly from soft to loud
until the sound is cut off. The greater the slope, the softer the
initial reverberation and the more pronounced its rise. With
negative values, the low frequency reverb drops from its initial level
to a quieter one before cutoff. The lower the slope, the more
pronounced the dropoff.
Mid Slope is similar to Low Slope, but applies to middle and high
frequencies. Frequencies affected are determined by Crossover.
Crossover
Crossover 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 Crossover 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.
Rt HC
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 reverb.
Pre Delay
Pre Delay adjusts an additional time delay between the input of
signal and the onset of reverberation. The maximum range is
930ms. This control is not intended to mimic the time delays in
natural spaces. In real rooms, the build-up of reverberation is
gradual, and the initial time gap is usually relatively short. Natural
spaces are best emulated by adjusting Spread for the desired
effective predelay.
Infinite
In the Infinite algorithm, this control is provided to turn the infinite
effect On or Off.
RefLvl L&R, RefDly L&R
These controls provide pre-echoes to the left and right channels.
The maximum range for Inverse effects is 800ms. In all other effects
it is 1.2 seconds. Press Load/✱ to cycle through the selections.
EkoFbk L&R,EkoDly L&R
Available in the Plate, Chamber and Infinite algorithms, these
controls provide a pre-echo of 1.2 seconds maximum to the left
and right channels, with feedback. Press Load/✱ to cycle through
the selections.
PstMix, PstGld
In the 4-Voice Algorithms, these controls adjust a pair of delays
after the reverb. Press Load/✱ to cycle through the selections:
PstMix, Pst Dly L&R, GldResp and GldRange.
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